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Merge 5.4.208 into android11-5.4-lts

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Changes in 5.4.208
	pinctrl: stm32: fix optional IRQ support to gpios
	riscv: add as-options for modules with assembly compontents
	mlxsw: spectrum_router: Fix IPv4 nexthop gateway indication
	lockdown: Fix kexec lockdown bypass with ima policy
	xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE
	PCI: hv: Fix multi-MSI to allow more than one MSI vector
	PCI: hv: Fix hv_arch_irq_unmask() for multi-MSI
	PCI: hv: Reuse existing IRTE allocation in compose_msi_msg()
	PCI: hv: Fix interrupt mapping for multi-MSI
	serial: mvebu-uart: correctly report configured baudrate value
	xfrm: xfrm_policy: fix a possible double xfrm_pols_put() in xfrm_bundle_lookup()
	power/reset: arm-versatile: Fix refcount leak in versatile_reboot_probe
	pinctrl: ralink: Check for null return of devm_kcalloc
	perf/core: Fix data race between perf_event_set_output() and perf_mmap_close()
	igc: Reinstate IGC_REMOVED logic and implement it properly
	ip: Fix data-races around sysctl_ip_no_pmtu_disc.
	ip: Fix data-races around sysctl_ip_fwd_use_pmtu.
	ip: Fix data-races around sysctl_ip_nonlocal_bind.
	ip: Fix a data-race around sysctl_fwmark_reflect.
	tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept.
	tcp: Fix data-races around sysctl_tcp_mtu_probing.
	tcp: Fix data-races around sysctl_tcp_base_mss.
	tcp: Fix data-races around sysctl_tcp_min_snd_mss.
	tcp: Fix a data-race around sysctl_tcp_mtu_probe_floor.
	tcp: Fix a data-race around sysctl_tcp_probe_threshold.
	tcp: Fix a data-race around sysctl_tcp_probe_interval.
	i2c: cadence: Change large transfer count reset logic to be unconditional
	net: stmmac: fix dma queue left shift overflow issue
	net/tls: Fix race in TLS device down flow
	igmp: Fix data-races around sysctl_igmp_llm_reports.
	igmp: Fix a data-race around sysctl_igmp_max_memberships.
	tcp: Fix data-races around sysctl_tcp_syncookies.
	tcp: Fix data-races around sysctl_tcp_reordering.
	tcp: Fix data-races around some timeout sysctl knobs.
	tcp: Fix a data-race around sysctl_tcp_notsent_lowat.
	tcp: Fix a data-race around sysctl_tcp_tw_reuse.
	tcp: Fix data-races around sysctl_max_syn_backlog.
	tcp: Fix data-races around sysctl_tcp_fastopen.
	iavf: Fix handling of dummy receive descriptors
	i40e: Fix erroneous adapter reinitialization during recovery process
	ixgbe: Add locking to prevent panic when setting sriov_numvfs to zero
	gpio: pca953x: only use single read/write for No AI mode
	be2net: Fix buffer overflow in be_get_module_eeprom
	ipv4: Fix a data-race around sysctl_fib_multipath_use_neigh.
	udp: Fix a data-race around sysctl_udp_l3mdev_accept.
	tcp: Fix data-races around sysctl knobs related to SYN option.
	tcp: Fix a data-race around sysctl_tcp_early_retrans.
	tcp: Fix data-races around sysctl_tcp_recovery.
	tcp: Fix a data-race around sysctl_tcp_thin_linear_timeouts.
	tcp: Fix data-races around sysctl_tcp_slow_start_after_idle.
	tcp: Fix a data-race around sysctl_tcp_retrans_collapse.
	tcp: Fix a data-race around sysctl_tcp_stdurg.
	tcp: Fix a data-race around sysctl_tcp_rfc1337.
	tcp: Fix data-races around sysctl_tcp_max_reordering.
	spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers
	mm/mempolicy: fix uninit-value in mpol_rebind_policy()
	bpf: Make sure mac_header was set before using it
	dlm: fix pending remove if msg allocation fails
	ima: remove the IMA_TEMPLATE Kconfig option
	locking/refcount: Define constants for saturation and max refcount values
	locking/refcount: Ensure integer operands are treated as signed
	locking/refcount: Remove unused refcount_*_checked() variants
	locking/refcount: Move the bulk of the REFCOUNT_FULL implementation into the <linux/refcount.h> header
	locking/refcount: Improve performance of generic REFCOUNT_FULL code
	locking/refcount: Move saturation warnings out of line
	locking/refcount: Consolidate REFCOUNT_{MAX,SATURATED} definitions
	locking/refcount: Consolidate implementations of refcount_t
	x86: get rid of small constant size cases in raw_copy_{to,from}_user()
	x86/uaccess: Implement macros for CMPXCHG on user addresses
	mmap locking API: initial implementation as rwsem wrappers
	x86/mce: Deduplicate exception handling
	bitfield.h: Fix "type of reg too small for mask" test
	ALSA: memalloc: Align buffer allocations in page size
	Bluetooth: Add bt_skb_sendmsg helper
	Bluetooth: Add bt_skb_sendmmsg helper
	Bluetooth: SCO: Replace use of memcpy_from_msg with bt_skb_sendmsg
	Bluetooth: RFCOMM: Replace use of memcpy_from_msg with bt_skb_sendmmsg
	Bluetooth: Fix passing NULL to PTR_ERR
	Bluetooth: SCO: Fix sco_send_frame returning skb->len
	Bluetooth: Fix bt_skb_sendmmsg not allocating partial chunks
	tty: drivers/tty/, stop using tty_schedule_flip()
	tty: the rest, stop using tty_schedule_flip()
	tty: drop tty_schedule_flip()
	tty: extract tty_flip_buffer_commit() from tty_flip_buffer_push()
	tty: use new tty_insert_flip_string_and_push_buffer() in pty_write()
	net: usb: ax88179_178a needs FLAG_SEND_ZLP
	x86: drop bogus "cc" clobber from __try_cmpxchg_user_asm()
	Linux 5.4.208

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ia53caf9bc847b0bb332a5b14972142d46ae5a740
This commit is contained in:
Greg Kroah-Hartman
2022-07-30 14:33:07 +02:00
parent 06f012f2c0 77ba2b9b46
commit b1e3be07f2
93 changed files with 1050 additions and 994 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

@@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
VERSION = 5
PATCHLEVEL = 4
SUBLEVEL = 207
SUBLEVEL = 208
EXTRAVERSION =
NAME = Kleptomaniac Octopus

21
arch/Kconfig
View File

@@ -1021,27 +1021,6 @@ config STRICT_MODULE_RWX
config ARCH_HAS_PHYS_TO_DMA
bool
config ARCH_HAS_REFCOUNT
bool
help
An architecture selects this when it has implemented refcount_t
using open coded assembly primitives that provide an optimized
refcount_t implementation, possibly at the expense of some full
refcount state checks of CONFIG_REFCOUNT_FULL=y.
The refcount overflow check behavior, however, must be retained.
Catching overflows is the primary security concern for protecting
against bugs in reference counts.
config REFCOUNT_FULL
bool "Perform full reference count validation at the expense of speed"
help
Enabling this switches the refcounting infrastructure from a fast
unchecked atomic_t implementation to a fully state checked
implementation, which can be (slightly) slower but provides protections
against various use-after-free conditions that can be used in
security flaw exploits.
config HAVE_ARCH_COMPILER_H
bool
help

2
arch/alpha/kernel/srmcons.c
View File

@@ -59,7 +59,7 @@ srmcons_do_receive_chars(struct tty_port *port)
} while((result.bits.status & 1) && (++loops < 10));
if (count)
tty_schedule_flip(port);
tty_flip_buffer_push(port);
return count;
}

1
arch/arm/Kconfig
View File

@@ -119,7 +119,6 @@ config ARM
select OLD_SIGSUSPEND3
select PCI_SYSCALL if PCI
select PERF_USE_VMALLOC
select REFCOUNT_FULL
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
# Above selects are sorted alphabetically; please add new ones

1
arch/arm64/Kconfig
View File

@@ -184,7 +184,6 @@ config ARM64
select PCI_SYSCALL if PCI
select POWER_RESET
select POWER_SUPPLY
select REFCOUNT_FULL
select SPARSE_IRQ
select SWIOTLB
select SYSCTL_EXCEPTION_TRACE

1
arch/riscv/Makefile
View File

@@ -74,6 +74,7 @@ ifeq ($(CONFIG_PERF_EVENTS),y)
endif
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
# GCC versions that support the "-mstrict-align" option default to allowing
# unaligned accesses. While unaligned accesses are explicitly allowed in the

1
arch/s390/configs/debug_defconfig
View File

@@ -62,7 +62,6 @@ CONFIG_OPROFILE=m
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
CONFIG_STATIC_KEYS_SELFTEST=y
CONFIG_REFCOUNT_FULL=y
CONFIG_LOCK_EVENT_COUNTS=y
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y

1
arch/x86/Kconfig
View File

@@ -73,7 +73,6 @@ config X86
select ARCH_HAS_PMEM_API if X86_64
select ARCH_HAS_PTE_DEVMAP if X86_64
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_REFCOUNT
select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64
select ARCH_HAS_UACCESS_MCSAFE if X86_64 && X86_MCE
select ARCH_HAS_SET_MEMORY

6
arch/x86/include/asm/asm.h
View File

@@ -141,9 +141,6 @@
# define _ASM_EXTABLE_EX(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
# define _ASM_EXTABLE_REFCOUNT(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
# define _ASM_NOKPROBE(entry) \
.pushsection "_kprobe_blacklist","aw" ; \
_ASM_ALIGN ; \
@@ -172,9 +169,6 @@
# define _ASM_EXTABLE_EX(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
# define _ASM_EXTABLE_REFCOUNT(from, to) \
_ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
/* For C file, we already have NOKPROBE_SYMBOL macro */
#endif

126
arch/x86/include/asm/refcount.h
View File

@@ -1,126 +0,0 @@
#ifndef __ASM_X86_REFCOUNT_H
#define __ASM_X86_REFCOUNT_H
/*
* x86-specific implementation of refcount_t. Based on PAX_REFCOUNT from
* PaX/grsecurity.
*/
#include <linux/refcount.h>
#include <asm/bug.h>
/*
* This is the first portion of the refcount error handling, which lives in
* .text.unlikely, and is jumped to from the CPU flag check (in the
* following macros). This saves the refcount value location into CX for
* the exception handler to use (in mm/extable.c), and then triggers the
* central refcount exception. The fixup address for the exception points
* back to the regular execution flow in .text.
*/
#define _REFCOUNT_EXCEPTION \
".pushsection .text..refcount\n" \
"111:\tlea %[var], %%" _ASM_CX "\n" \
"112:\t" ASM_UD2 "\n" \
ASM_UNREACHABLE \
".popsection\n" \
"113:\n" \
_ASM_EXTABLE_REFCOUNT(112b, 113b)
/* Trigger refcount exception if refcount result is negative. */
#define REFCOUNT_CHECK_LT_ZERO \
"js 111f\n\t" \
_REFCOUNT_EXCEPTION
/* Trigger refcount exception if refcount result is zero or negative. */
#define REFCOUNT_CHECK_LE_ZERO \
"jz 111f\n\t" \
REFCOUNT_CHECK_LT_ZERO
/* Trigger refcount exception unconditionally. */
#define REFCOUNT_ERROR \
"jmp 111f\n\t" \
_REFCOUNT_EXCEPTION
static __always_inline void refcount_add(unsigned int i, refcount_t *r)
{
asm volatile(LOCK_PREFIX "addl %1,%0\n\t"
REFCOUNT_CHECK_LT_ZERO
: [var] "+m" (r->refs.counter)
: "ir" (i)
: "cc", "cx");
}
static __always_inline void refcount_inc(refcount_t *r)
{
asm volatile(LOCK_PREFIX "incl %0\n\t"
REFCOUNT_CHECK_LT_ZERO
: [var] "+m" (r->refs.counter)
: : "cc", "cx");
}
static __always_inline void refcount_dec(refcount_t *r)
{
asm volatile(LOCK_PREFIX "decl %0\n\t"
REFCOUNT_CHECK_LE_ZERO
: [var] "+m" (r->refs.counter)
: : "cc", "cx");
}
static __always_inline __must_check
bool refcount_sub_and_test(unsigned int i, refcount_t *r)
{
bool ret = GEN_BINARY_SUFFIXED_RMWcc(LOCK_PREFIX "subl",
REFCOUNT_CHECK_LT_ZERO,
r->refs.counter, e, "er", i, "cx");
if (ret) {
smp_acquire__after_ctrl_dep();
return true;
}
return false;
}
static __always_inline __must_check bool refcount_dec_and_test(refcount_t *r)
{
bool ret = GEN_UNARY_SUFFIXED_RMWcc(LOCK_PREFIX "decl",
REFCOUNT_CHECK_LT_ZERO,
r->refs.counter, e, "cx");
if (ret) {
smp_acquire__after_ctrl_dep();
return true;
}
return false;
}
static __always_inline __must_check
bool refcount_add_not_zero(unsigned int i, refcount_t *r)
{
int c, result;
c = atomic_read(&(r->refs));
do {
if (unlikely(c == 0))
return false;
result = c + i;
/* Did we try to increment from/to an undesirable state? */
if (unlikely(c < 0 || c == INT_MAX || result < c)) {
asm volatile(REFCOUNT_ERROR
: : [var] "m" (r->refs.counter)
: "cc", "cx");
break;
}
} while (!atomic_try_cmpxchg(&(r->refs), &c, result));
return c != 0;
}
static __always_inline __must_check bool refcount_inc_not_zero(refcount_t *r)
{
return refcount_add_not_zero(1, r);
}
#endif

154
arch/x86/include/asm/uaccess.h
View File

@@ -378,18 +378,6 @@ do { \
: "=r" (err), ltype(x) \
: "m" (__m(addr)), "i" (errret), "0" (err))
#define __get_user_asm_nozero(x, addr, err, itype, rtype, ltype, errret) \
asm volatile("\n" \
"1: mov"itype" %2,%"rtype"1\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3: mov %3,%0\n" \
" jmp 2b\n" \
".previous\n" \
_ASM_EXTABLE_UA(1b, 3b) \
: "=r" (err), ltype(x) \
: "m" (__m(addr)), "i" (errret), "0" (err))
/*
* This doesn't do __uaccess_begin/end - the exception handling
* around it must do that.
@@ -453,6 +441,103 @@ __pu_label: \
__builtin_expect(__gu_err, 0); \
})
#ifdef CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT
#define __try_cmpxchg_user_asm(itype, ltype, _ptr, _pold, _new, label) ({ \
bool success; \
__typeof__(_ptr) _old = (__typeof__(_ptr))(_pold); \
__typeof__(*(_ptr)) __old = *_old; \
__typeof__(*(_ptr)) __new = (_new); \
asm_volatile_goto("\n" \
"1: " LOCK_PREFIX "cmpxchg"itype" %[new], %[ptr]\n"\
_ASM_EXTABLE_UA(1b, %l[label]) \
: CC_OUT(z) (success), \
[ptr] "+m" (*_ptr), \
[old] "+a" (__old) \
: [new] ltype (__new) \
: "memory" \
: label); \
if (unlikely(!success)) \
*_old = __old; \
likely(success); })
#ifdef CONFIG_X86_32
#define __try_cmpxchg64_user_asm(_ptr, _pold, _new, label) ({ \
bool success; \
__typeof__(_ptr) _old = (__typeof__(_ptr))(_pold); \
__typeof__(*(_ptr)) __old = *_old; \
__typeof__(*(_ptr)) __new = (_new); \
asm_volatile_goto("\n" \
"1: " LOCK_PREFIX "cmpxchg8b %[ptr]\n" \
_ASM_EXTABLE_UA(1b, %l[label]) \
: CC_OUT(z) (success), \
"+A" (__old), \
[ptr] "+m" (*_ptr) \
: "b" ((u32)__new), \
"c" ((u32)((u64)__new >> 32)) \
: "memory" \
: label); \
if (unlikely(!success)) \
*_old = __old; \
likely(success); })
#endif // CONFIG_X86_32
#else // !CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT
#define __try_cmpxchg_user_asm(itype, ltype, _ptr, _pold, _new, label) ({ \
int __err = 0; \
bool success; \
__typeof__(_ptr) _old = (__typeof__(_ptr))(_pold); \
__typeof__(*(_ptr)) __old = *_old; \
__typeof__(*(_ptr)) __new = (_new); \
asm volatile("\n" \
"1: " LOCK_PREFIX "cmpxchg"itype" %[new], %[ptr]\n"\
CC_SET(z) \
"2:\n" \
_ASM_EXTABLE_TYPE_REG(1b, 2b, EX_TYPE_EFAULT_REG, \
%[errout]) \
: CC_OUT(z) (success), \
[errout] "+r" (__err), \
[ptr] "+m" (*_ptr), \
[old] "+a" (__old) \
: [new] ltype (__new) \
: "memory"); \
if (unlikely(__err)) \
goto label; \
if (unlikely(!success)) \
*_old = __old; \
likely(success); })
#ifdef CONFIG_X86_32
/*
* Unlike the normal CMPXCHG, hardcode ECX for both success/fail and error.
* There are only six GPRs available and four (EAX, EBX, ECX, and EDX) are
* hardcoded by CMPXCHG8B, leaving only ESI and EDI. If the compiler uses
* both ESI and EDI for the memory operand, compilation will fail if the error
* is an input+output as there will be no register available for input.
*/
#define __try_cmpxchg64_user_asm(_ptr, _pold, _new, label) ({ \
int __result; \
__typeof__(_ptr) _old = (__typeof__(_ptr))(_pold); \
__typeof__(*(_ptr)) __old = *_old; \
__typeof__(*(_ptr)) __new = (_new); \
asm volatile("\n" \
"1: " LOCK_PREFIX "cmpxchg8b %[ptr]\n" \
"mov $0, %%ecx\n\t" \
"setz %%cl\n" \
"2:\n" \
_ASM_EXTABLE_TYPE_REG(1b, 2b, EX_TYPE_EFAULT_REG, %%ecx) \
: [result]"=c" (__result), \
"+A" (__old), \
[ptr] "+m" (*_ptr) \
: "b" ((u32)__new), \
"c" ((u32)((u64)__new >> 32)) \
: "memory", "cc"); \
if (unlikely(__result < 0)) \
goto label; \
if (unlikely(!__result)) \
*_old = __old; \
likely(__result); })
#endif // CONFIG_X86_32
#endif // CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT
/* FIXME: this hack is definitely wrong -AK */
struct __large_struct { unsigned long buf[100]; };
#define __m(x) (*(struct __large_struct __user *)(x))
@@ -734,6 +819,51 @@ do { \
if (unlikely(__gu_err)) goto err_label; \
} while (0)
extern void __try_cmpxchg_user_wrong_size(void);
#ifndef CONFIG_X86_32
#define __try_cmpxchg64_user_asm(_ptr, _oldp, _nval, _label) \
__try_cmpxchg_user_asm("q", "r", (_ptr), (_oldp), (_nval), _label)
#endif
/*
* Force the pointer to u<size> to match the size expected by the asm helper.
* clang/LLVM compiles all cases and only discards the unused paths after
* processing errors, which breaks i386 if the pointer is an 8-byte value.
*/
#define unsafe_try_cmpxchg_user(_ptr, _oldp, _nval, _label) ({ \
bool __ret; \
__chk_user_ptr(_ptr); \
switch (sizeof(*(_ptr))) { \
case 1: __ret = __try_cmpxchg_user_asm("b", "q", \
(__force u8 *)(_ptr), (_oldp), \
(_nval), _label); \
break; \
case 2: __ret = __try_cmpxchg_user_asm("w", "r", \
(__force u16 *)(_ptr), (_oldp), \
(_nval), _label); \
break; \
case 4: __ret = __try_cmpxchg_user_asm("l", "r", \
(__force u32 *)(_ptr), (_oldp), \
(_nval), _label); \
break; \
case 8: __ret = __try_cmpxchg64_user_asm((__force u64 *)(_ptr), (_oldp),\
(_nval), _label); \
break; \
default: __try_cmpxchg_user_wrong_size(); \
} \
__ret; })
/* "Returns" 0 on success, 1 on failure, -EFAULT if the access faults. */
#define __try_cmpxchg_user(_ptr, _oldp, _nval, _label) ({ \
int __ret = -EFAULT; \
__uaccess_begin_nospec(); \
__ret = !unsafe_try_cmpxchg_user(_ptr, _oldp, _nval, _label); \
_label: \
__uaccess_end(); \
__ret; \
})
/*
* We want the unsafe accessors to always be inlined and use
* the error labels - thus the macro games.

27
arch/x86/include/asm/uaccess_32.h
View File

@@ -23,33 +23,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
static __always_inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (__builtin_constant_p(n)) {
unsigned long ret;
switch (n) {
case 1:
ret = 0;
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u8 *)to, from, ret,
"b", "b", "=q", 1);
__uaccess_end();
return ret;
case 2:
ret = 0;
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u16 *)to, from, ret,
"w", "w", "=r", 2);
__uaccess_end();
return ret;
case 4:
ret = 0;
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u32 *)to, from, ret,
"l", "k", "=r", 4);
__uaccess_end();
return ret;
}
}
return __copy_user_ll(to, (__force const void *)from, n);
}

108
arch/x86/include/asm/uaccess_64.h
View File

@@ -65,117 +65,13 @@ copy_to_user_mcsafe(void *to, const void *from, unsigned len)
static __always_inline __must_check unsigned long
raw_copy_from_user(void *dst, const void __user *src, unsigned long size)
{
int ret = 0;
if (!__builtin_constant_p(size))
return copy_user_generic(dst, (__force void *)src, size);
switch (size) {
case 1:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u8 *)dst, (u8 __user *)src,
ret, "b", "b", "=q", 1);
__uaccess_end();
return ret;
case 2:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u16 *)dst, (u16 __user *)src,
ret, "w", "w", "=r", 2);
__uaccess_end();
return ret;
case 4:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u32 *)dst, (u32 __user *)src,
ret, "l", "k", "=r", 4);
__uaccess_end();
return ret;
case 8:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 8);
__uaccess_end();
return ret;
case 10:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 10);
if (likely(!ret))
__get_user_asm_nozero(*(u16 *)(8 + (char *)dst),
(u16 __user *)(8 + (char __user *)src),
ret, "w", "w", "=r", 2);
__uaccess_end();
return ret;
case 16:
__uaccess_begin_nospec();
__get_user_asm_nozero(*(u64 *)dst, (u64 __user *)src,
ret, "q", "", "=r", 16);
if (likely(!ret))
__get_user_asm_nozero(*(u64 *)(8 + (char *)dst),
(u64 __user *)(8 + (char __user *)src),
ret, "q", "", "=r", 8);
__uaccess_end();
return ret;
default:
return copy_user_generic(dst, (__force void *)src, size);
}
return copy_user_generic(dst, (__force void *)src, size);
}
static __always_inline __must_check unsigned long
raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
{
int ret = 0;
if (!__builtin_constant_p(size))
return copy_user_generic((__force void *)dst, src, size);
switch (size) {
case 1:
__uaccess_begin();
__put_user_asm(*(u8 *)src, (u8 __user *)dst,
ret, "b", "b", "iq", 1);
__uaccess_end();
return ret;
case 2:
__uaccess_begin();
__put_user_asm(*(u16 *)src, (u16 __user *)dst,
ret, "w", "w", "ir", 2);
__uaccess_end();
return ret;
case 4:
__uaccess_begin();
__put_user_asm(*(u32 *)src, (u32 __user *)dst,
ret, "l", "k", "ir", 4);
__uaccess_end();
return ret;
case 8:
__uaccess_begin();
__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "er", 8);
__uaccess_end();
return ret;
case 10:
__uaccess_begin();
__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "er", 10);
if (likely(!ret)) {
asm("":::"memory");
__put_user_asm(4[(u16 *)src], 4 + (u16 __user *)dst,
ret, "w", "w", "ir", 2);
}
__uaccess_end();
return ret;
case 16:
__uaccess_begin();
__put_user_asm(*(u64 *)src, (u64 __user *)dst,
ret, "q", "", "er", 16);
if (likely(!ret)) {
asm("":::"memory");
__put_user_asm(1[(u64 *)src], 1 + (u64 __user *)dst,
ret, "q", "", "er", 8);
}
__uaccess_end();
return ret;
default:
return copy_user_generic((__force void *)dst, src, size);
}
return copy_user_generic((__force void *)dst, src, size);
}
static __always_inline __must_check

34
arch/x86/kernel/cpu/mce/core.c
View File

@@ -397,13 +397,16 @@ static int msr_to_offset(u32 msr)
return -1;
}
__visible bool ex_handler_rdmsr_fault(const struct exception_table_entry *fixup,
struct pt_regs *regs, int trapnr,
unsigned long error_code,
unsigned long fault_addr)
static void ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr)
{
pr_emerg("MSR access error: RDMSR from 0x%x at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, regs->ip, (void *)regs->ip);
if (wrmsr) {
pr_emerg("MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x) at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, (unsigned int)regs->dx, (unsigned int)regs->ax,
regs->ip, (void *)regs->ip);
} else {
pr_emerg("MSR access error: RDMSR from 0x%x at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, regs->ip, (void *)regs->ip);
}
show_stack_regs(regs);
@@ -411,7 +414,14 @@ __visible bool ex_handler_rdmsr_fault(const struct exception_table_entry *fixup,
while (true)
cpu_relax();
}
__visible bool ex_handler_rdmsr_fault(const struct exception_table_entry *fixup,
struct pt_regs *regs, int trapnr,
unsigned long error_code,
unsigned long fault_addr)
{
ex_handler_msr_mce(regs, false);
return true;
}
@@ -447,17 +457,7 @@ __visible bool ex_handler_wrmsr_fault(const struct exception_table_entry *fixup,
unsigned long error_code,
unsigned long fault_addr)
{
pr_emerg("MSR access error: WRMSR to 0x%x (tried to write 0x%08x%08x) at rIP: 0x%lx (%pS)\n",
(unsigned int)regs->cx, (unsigned int)regs->dx, (unsigned int)regs->ax,
regs->ip, (void *)regs->ip);
show_stack_regs(regs);
panic("MCA architectural violation!\n");
while (true)
cpu_relax();
ex_handler_msr_mce(regs, true);
return true;
}

49
arch/x86/mm/extable.c
View File

@@ -44,55 +44,6 @@ __visible bool ex_handler_fault(const struct exception_table_entry *fixup,
}
EXPORT_SYMBOL_GPL(ex_handler_fault);
/*
* Handler for UD0 exception following a failed test against the
* result of a refcount inc/dec/add/sub.
*/
__visible bool ex_handler_refcount(const struct exception_table_entry *fixup,
struct pt_regs *regs, int trapnr,
unsigned long error_code,
unsigned long fault_addr)
{
/* First unconditionally saturate the refcount. */
*(int *)regs->cx = INT_MIN / 2;
/*
* Strictly speaking, this reports the fixup destination, not
* the fault location, and not the actually overflowing
* instruction, which is the instruction before the "js", but
* since that instruction could be a variety of lengths, just
* report the location after the overflow, which should be close
* enough for finding the overflow, as it's at least back in
* the function, having returned from .text.unlikely.
*/
regs->ip = ex_fixup_addr(fixup);
/*
* This function has been called because either a negative refcount
* value was seen by any of the refcount functions, or a zero
* refcount value was seen by refcount_dec().
*
* If we crossed from INT_MAX to INT_MIN, OF (Overflow Flag: result
* wrapped around) will be set. Additionally, seeing the refcount
* reach 0 will set ZF (Zero Flag: result was zero). In each of
* these cases we want a report, since it's a boundary condition.
* The SF case is not reported since it indicates post-boundary
* manipulations below zero or above INT_MAX. And if none of the
* flags are set, something has gone very wrong, so report it.
*/
if (regs->flags & (X86_EFLAGS_OF | X86_EFLAGS_ZF)) {
bool zero = regs->flags & X86_EFLAGS_ZF;
refcount_error_report(regs, zero ? "hit zero" : "overflow");
} else if ((regs->flags & X86_EFLAGS_SF) == 0) {
/* Report if none of OF, ZF, nor SF are set. */
refcount_error_report(regs, "unexpected saturation");
}
return true;
}
EXPORT_SYMBOL(ex_handler_refcount);
/*
* Handler for when we fail to restore a task's FPU state. We should never get
* here because the FPU state of a task using the FPU (task->thread.fpu.state)

6
drivers/crypto/chelsio/chtls/chtls_cm.c
View File

@@ -1103,8 +1103,8 @@ static struct sock *chtls_recv_sock(struct sock *lsk,
csk->sndbuf = newsk->sk_sndbuf;
csk->smac_idx = ((struct port_info *)netdev_priv(ndev))->smt_idx;
RCV_WSCALE(tp) = select_rcv_wscale(tcp_full_space(newsk),
sock_net(newsk)->
ipv4.sysctl_tcp_window_scaling,
READ_ONCE(sock_net(newsk)->
ipv4.sysctl_tcp_window_scaling),
tp->window_clamp);
neigh_release(n);
inet_inherit_port(&tcp_hashinfo, lsk, newsk);
@@ -1235,7 +1235,7 @@ static void chtls_pass_accept_request(struct sock *sk,
chtls_set_req_addr(oreq, iph->daddr, iph->saddr);
ip_dsfield = ipv4_get_dsfield(iph);
if (req->tcpopt.wsf <= 14 &&
sock_net(sk)->ipv4.sysctl_tcp_window_scaling) {
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_window_scaling)) {
inet_rsk(oreq)->wscale_ok = 1;
inet_rsk(oreq)->snd_wscale = req->tcpopt.wsf;
}

3
drivers/gpio/gpio-pca953x.c
View File

@@ -379,6 +379,9 @@ static const struct regmap_config pca953x_i2c_regmap = {
.reg_bits = 8,
.val_bits = 8,
.use_single_read = true,
.use_single_write = true,
.readable_reg = pca953x_readable_register,
.writeable_reg = pca953x_writeable_register,
.volatile_reg = pca953x_volatile_register,

1
drivers/gpu/drm/i915/Kconfig.debug
View File

@@ -21,7 +21,6 @@ config DRM_I915_DEBUG
depends on DRM_I915
select DEBUG_FS
select PREEMPT_COUNT
select REFCOUNT_FULL
select I2C_CHARDEV
select STACKDEPOT
select DRM_DP_AUX_CHARDEV

30
drivers/i2c/busses/i2c-cadence.c
View File

@@ -198,9 +198,9 @@ static inline bool cdns_is_holdquirk(struct cdns_i2c *id, bool hold_wrkaround)
*/
static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
{
unsigned int isr_status, avail_bytes, updatetx;
unsigned int isr_status, avail_bytes;
unsigned int bytes_to_send;
bool hold_quirk;
bool updatetx;
struct cdns_i2c *id = ptr;
/* Signal completion only after everything is updated */
int done_flag = 0;
@@ -219,11 +219,7 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
* Check if transfer size register needs to be updated again for a
* large data receive operation.
*/
updatetx = 0;
if (id->recv_count > id->curr_recv_count)
updatetx = 1;
hold_quirk = (id->quirks & CDNS_I2C_BROKEN_HOLD_BIT) && updatetx;
updatetx = id->recv_count > id->curr_recv_count;
/* When receiving, handle data interrupt and completion interrupt */
if (id->p_recv_buf &&
@@ -246,7 +242,7 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
id->recv_count--;
id->curr_recv_count--;
if (cdns_is_holdquirk(id, hold_quirk))
if (cdns_is_holdquirk(id, updatetx))
break;
}
@@ -257,7 +253,7 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
* maintain transfer size non-zero while performing a large
* receive operation.
*/
if (cdns_is_holdquirk(id, hold_quirk)) {
if (cdns_is_holdquirk(id, updatetx)) {
/* wait while fifo is full */
while (cdns_i2c_readreg(CDNS_I2C_XFER_SIZE_OFFSET) !=
(id->curr_recv_count - CDNS_I2C_FIFO_DEPTH))
@@ -279,22 +275,6 @@ static irqreturn_t cdns_i2c_isr(int irq, void *ptr)
CDNS_I2C_XFER_SIZE_OFFSET);
id->curr_recv_count = id->recv_count;
}
} else if (id->recv_count && !hold_quirk &&
!id->curr_recv_count) {
/* Set the slave address in address register*/
cdns_i2c_writereg(id->p_msg->addr & CDNS_I2C_ADDR_MASK,
CDNS_I2C_ADDR_OFFSET);
if (id->recv_count > CDNS_I2C_TRANSFER_SIZE) {
cdns_i2c_writereg(CDNS_I2C_TRANSFER_SIZE,
CDNS_I2C_XFER_SIZE_OFFSET);
id->curr_recv_count = CDNS_I2C_TRANSFER_SIZE;
} else {
cdns_i2c_writereg(id->recv_count,
CDNS_I2C_XFER_SIZE_OFFSET);
id->curr_recv_count = id->recv_count;
}
}
/* Clear hold (if not repeated start) and signal completion */

8
drivers/misc/lkdtm/refcount.c
View File

@@ -6,14 +6,6 @@
#include "lkdtm.h"
#include <linux/refcount.h>
#ifdef CONFIG_REFCOUNT_FULL
#define REFCOUNT_MAX (UINT_MAX - 1)
#define REFCOUNT_SATURATED UINT_MAX
#else
#define REFCOUNT_MAX INT_MAX
#define REFCOUNT_SATURATED (INT_MIN / 2)
#endif
static void overflow_check(refcount_t *ref)
{
switch (refcount_read(ref)) {

10
drivers/net/ethernet/emulex/benet/be_cmds.c
View File

@@ -2287,7 +2287,7 @@ err:
/* Uses sync mcc */
int be_cmd_read_port_transceiver_data(struct be_adapter *adapter,
u8 page_num, u8 *data)
u8 page_num, u32 off, u32 len, u8 *data)
{
struct be_dma_mem cmd;
struct be_mcc_wrb *wrb;
@@ -2321,10 +2321,10 @@ int be_cmd_read_port_transceiver_data(struct be_adapter *adapter,
req->port = cpu_to_le32(adapter->hba_port_num);
req->page_num = cpu_to_le32(page_num);
status = be_mcc_notify_wait(adapter);
if (!status) {
if (!status && len > 0) {
struct be_cmd_resp_port_type *resp = cmd.va;
memcpy(data, resp->page_data, PAGE_DATA_LEN);
memcpy(data, resp->page_data + off, len);
}
err:
mutex_unlock(&adapter->mcc_lock);
@@ -2415,7 +2415,7 @@ int be_cmd_query_cable_type(struct be_adapter *adapter)
int status;
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A0,
page_data);
0, PAGE_DATA_LEN, page_data);
if (!status) {
switch (adapter->phy.interface_type) {
case PHY_TYPE_QSFP:
@@ -2440,7 +2440,7 @@ int be_cmd_query_sfp_info(struct be_adapter *adapter)
int status;
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A0,
page_data);
0, PAGE_DATA_LEN, page_data);
if (!status) {
strlcpy(adapter->phy.vendor_name, page_data +
SFP_VENDOR_NAME_OFFSET, SFP_VENDOR_NAME_LEN - 1);

2
drivers/net/ethernet/emulex/benet/be_cmds.h
View File

@@ -2427,7 +2427,7 @@ int be_cmd_set_beacon_state(struct be_adapter *adapter, u8 port_num, u8 beacon,
int be_cmd_get_beacon_state(struct be_adapter *adapter, u8 port_num,
u32 *state);
int be_cmd_read_port_transceiver_data(struct be_adapter *adapter,
u8 page_num, u8 *data);
u8 page_num, u32 off, u32 len, u8 *data);
int be_cmd_query_cable_type(struct be_adapter *adapter);
int be_cmd_query_sfp_info(struct be_adapter *adapter);
int lancer_cmd_read_object(struct be_adapter *adapter, struct be_dma_mem *cmd,

31
drivers/net/ethernet/emulex/benet/be_ethtool.c
View File

@@ -1339,7 +1339,7 @@ static int be_get_module_info(struct net_device *netdev,
return -EOPNOTSUPP;
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A0,
page_data);
0, PAGE_DATA_LEN, page_data);
if (!status) {
if (!page_data[SFP_PLUS_SFF_8472_COMP]) {
modinfo->type = ETH_MODULE_SFF_8079;
@@ -1357,25 +1357,32 @@ static int be_get_module_eeprom(struct net_device *netdev,
{
struct be_adapter *adapter = netdev_priv(netdev);
int status;
u32 begin, end;
if (!check_privilege(adapter, MAX_PRIVILEGES))
return -EOPNOTSUPP;
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A0,
data);
if (status)
goto err;
begin = eeprom->offset;
end = eeprom->offset + eeprom->len;
if (eeprom->offset + eeprom->len > PAGE_DATA_LEN) {
status = be_cmd_read_port_transceiver_data(adapter,
TR_PAGE_A2,
data +
PAGE_DATA_LEN);
if (begin < PAGE_DATA_LEN) {
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A0, begin,
min_t(u32, end, PAGE_DATA_LEN) - begin,
data);
if (status)
goto err;
data += PAGE_DATA_LEN - begin;
begin = PAGE_DATA_LEN;
}
if (end > PAGE_DATA_LEN) {
status = be_cmd_read_port_transceiver_data(adapter, TR_PAGE_A2,
begin - PAGE_DATA_LEN,
end - begin, data);
if (status)
goto err;
}
if (eeprom->offset)
memcpy(data, data + eeprom->offset, eeprom->len);
err:
return be_cmd_status(status);
}

13
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@@ -10068,7 +10068,7 @@ static int i40e_reset(struct i40e_pf *pf)
**/
static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
{
int old_recovery_mode_bit = test_bit(__I40E_RECOVERY_MODE, pf->state);
const bool is_recovery_mode_reported = i40e_check_recovery_mode(pf);
struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
struct i40e_hw *hw = &pf->hw;
i40e_status ret;
@@ -10076,13 +10076,11 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
int v;
if (test_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state) &&
i40e_check_recovery_mode(pf)) {
is_recovery_mode_reported)
i40e_set_ethtool_ops(pf->vsi[pf->lan_vsi]->netdev);
}
if (test_bit(__I40E_DOWN, pf->state) &&
!test_bit(__I40E_RECOVERY_MODE, pf->state) &&
!old_recovery_mode_bit)
!test_bit(__I40E_RECOVERY_MODE, pf->state))
goto clear_recovery;
dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
@@ -10109,13 +10107,12 @@ static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
* accordingly with regard to resources initialization
* and deinitialization
*/
if (test_bit(__I40E_RECOVERY_MODE, pf->state) ||
old_recovery_mode_bit) {
if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
if (i40e_get_capabilities(pf,
i40e_aqc_opc_list_func_capabilities))
goto end_unlock;
if (test_bit(__I40E_RECOVERY_MODE, pf->state)) {
if (is_recovery_mode_reported) {
/* we're staying in recovery mode so we'll reinitialize
* misc vector here
*/

5
drivers/net/ethernet/intel/iavf/iavf_txrx.c
View File

@@ -1263,11 +1263,10 @@ static struct iavf_rx_buffer *iavf_get_rx_buffer(struct iavf_ring *rx_ring,
{
struct iavf_rx_buffer *rx_buffer;
if (!size)
return NULL;
rx_buffer = &rx_ring->rx_bi[rx_ring->next_to_clean];
prefetchw(rx_buffer->page);
if (!size)
return rx_buffer;
/* we are reusing so sync this buffer for CPU use */
dma_sync_single_range_for_cpu(rx_ring->dev,

2
drivers/net/ethernet/intel/igc/igc_regs.h
View File

@@ -236,4 +236,6 @@ do { \
#define array_rd32(reg, offset) (igc_rd32(hw, (reg) + ((offset) << 2)))
#define IGC_REMOVED(h) unlikely(!(h))
#endif

1
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@@ -773,6 +773,7 @@ struct ixgbe_adapter {
#ifdef CONFIG_IXGBE_IPSEC
struct ixgbe_ipsec *ipsec;
#endif /* CONFIG_IXGBE_IPSEC */
spinlock_t vfs_lock;
};
static inline u8 ixgbe_max_rss_indices(struct ixgbe_adapter *adapter)

3
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@@ -6396,6 +6396,9 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter,
/* n-tuple support exists, always init our spinlock */
spin_lock_init(&adapter->fdir_perfect_lock);
/* init spinlock to avoid concurrency of VF resources */
spin_lock_init(&adapter->vfs_lock);
#ifdef CONFIG_IXGBE_DCB
ixgbe_init_dcb(adapter);
#endif

6
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
View File

@@ -204,10 +204,13 @@ void ixgbe_enable_sriov(struct ixgbe_adapter *adapter, unsigned int max_vfs)
int ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
{
unsigned int num_vfs = adapter->num_vfs, vf;
unsigned long flags;
int rss;
spin_lock_irqsave(&adapter->vfs_lock, flags);
/* set num VFs to 0 to prevent access to vfinfo */
adapter->num_vfs = 0;
spin_unlock_irqrestore(&adapter->vfs_lock, flags);
/* put the reference to all of the vf devices */
for (vf = 0; vf < num_vfs; ++vf) {
@@ -1305,8 +1308,10 @@ static void ixgbe_rcv_ack_from_vf(struct ixgbe_adapter *adapter, u32 vf)
void ixgbe_msg_task(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
unsigned long flags;
u32 vf;
spin_lock_irqsave(&adapter->vfs_lock, flags);
for (vf = 0; vf < adapter->num_vfs; vf++) {
/* process any reset requests */
if (!ixgbe_check_for_rst(hw, vf))
@@ -1320,6 +1325,7 @@ void ixgbe_msg_task(struct ixgbe_adapter *adapter)
if (!ixgbe_check_for_ack(hw, vf))
ixgbe_rcv_ack_from_vf(adapter, vf);
}
spin_unlock_irqrestore(&adapter->vfs_lock, flags);
}
void ixgbe_disable_tx_rx(struct ixgbe_adapter *adapter)

2
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@@ -3871,7 +3871,7 @@ static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp,
{
const struct fib_nh *nh = fib_info_nh(fi, 0);
return nh->fib_nh_scope == RT_SCOPE_LINK ||
return nh->fib_nh_gw_family ||
mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL);
}

3
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
View File

@@ -215,6 +215,9 @@ static void dwmac4_map_mtl_dma(struct mac_device_info *hw, u32 queue, u32 chan)
if (queue == 0 || queue == 4) {
value &= ~MTL_RXQ_DMA_Q04MDMACH_MASK;
value |= MTL_RXQ_DMA_Q04MDMACH(chan);
} else if (queue > 4) {
value &= ~MTL_RXQ_DMA_QXMDMACH_MASK(queue - 4);
value |= MTL_RXQ_DMA_QXMDMACH(chan, queue - 4);
} else {
value &= ~MTL_RXQ_DMA_QXMDMACH_MASK(queue);
value |= MTL_RXQ_DMA_QXMDMACH(chan, queue);

16
drivers/net/usb/ax88179_178a.c
View File

@@ -1690,7 +1690,7 @@ static const struct driver_info ax88179_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1703,7 +1703,7 @@ static const struct driver_info ax88178a_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1716,7 +1716,7 @@ static const struct driver_info cypress_GX3_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1729,7 +1729,7 @@ static const struct driver_info dlink_dub1312_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1742,7 +1742,7 @@ static const struct driver_info sitecom_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1755,7 +1755,7 @@ static const struct driver_info samsung_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1768,7 +1768,7 @@ static const struct driver_info lenovo_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};
@@ -1781,7 +1781,7 @@ static const struct driver_info belkin_info = {
.link_reset = ax88179_link_reset,
.reset = ax88179_reset,
.stop = ax88179_stop,
.flags = FLAG_ETHER | FLAG_FRAMING_AX,
.flags = FLAG_ETHER | FLAG_FRAMING_AX | FLAG_SEND_ZLP,
.rx_fixup = ax88179_rx_fixup,
.tx_fixup = ax88179_tx_fixup,
};

100
drivers/pci/controller/pci-hyperv.c
View File

@@ -1110,6 +1110,10 @@ static void hv_int_desc_free(struct hv_pci_dev *hpdev,
u8 buffer[sizeof(struct pci_delete_interrupt)];
} ctxt;
if (!int_desc->vector_count) {
kfree(int_desc);
return;
}
memset(&ctxt, 0, sizeof(ctxt));
int_pkt = (struct pci_delete_interrupt *)&ctxt.pkt.message;
int_pkt->message_type.type =
@@ -1172,6 +1176,28 @@ static void hv_irq_mask(struct irq_data *data)
pci_msi_mask_irq(data);
}
static unsigned int hv_msi_get_int_vector(struct irq_data *data)
{
struct irq_cfg *cfg = irqd_cfg(data);
return cfg->vector;
}
static int hv_msi_prepare(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *info)
{
int ret = pci_msi_prepare(domain, dev, nvec, info);
/*
* By using the interrupt remapper in the hypervisor IOMMU, contiguous
* CPU vectors is not needed for multi-MSI
*/
if (info->type == X86_IRQ_ALLOC_TYPE_MSI)
info->flags &= ~X86_IRQ_ALLOC_CONTIGUOUS_VECTORS;
return ret;
}
/**
* hv_irq_unmask() - "Unmask" the IRQ by setting its current
* affinity.
@@ -1187,6 +1213,7 @@ static void hv_irq_unmask(struct irq_data *data)
struct msi_desc *msi_desc = irq_data_get_msi_desc(data);
struct irq_cfg *cfg = irqd_cfg(data);
struct retarget_msi_interrupt *params;
struct tran_int_desc *int_desc;
struct hv_pcibus_device *hbus;
struct cpumask *dest;
cpumask_var_t tmp;
@@ -1201,6 +1228,7 @@ static void hv_irq_unmask(struct irq_data *data)
pdev = msi_desc_to_pci_dev(msi_desc);
pbus = pdev->bus;
hbus = container_of(pbus->sysdata, struct hv_pcibus_device, sysdata);
int_desc = data->chip_data;
spin_lock_irqsave(&hbus->retarget_msi_interrupt_lock, flags);
@@ -1208,8 +1236,8 @@ static void hv_irq_unmask(struct irq_data *data)
memset(params, 0, sizeof(*params));
params->partition_id = HV_PARTITION_ID_SELF;
params->int_entry.source = 1; /* MSI(-X) */
params->int_entry.address = msi_desc->msg.address_lo;
params->int_entry.data = msi_desc->msg.data;
params->int_entry.address = int_desc->address & 0xffffffff;
params->int_entry.data = int_desc->data;
params->device_id = (hbus->hdev->dev_instance.b[5] << 24) |
(hbus->hdev->dev_instance.b[4] << 16) |
(hbus->hdev->dev_instance.b[7] << 8) |
@@ -1296,12 +1324,12 @@ static void hv_pci_compose_compl(void *context, struct pci_response *resp,
static u32 hv_compose_msi_req_v1(
struct pci_create_interrupt *int_pkt, struct cpumask *affinity,
u32 slot, u8 vector)
u32 slot, u8 vector, u8 vector_count)
{
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE;
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
int_pkt->int_desc.vector_count = vector_count;
int_pkt->int_desc.delivery_mode = dest_Fixed;
/*
@@ -1315,14 +1343,14 @@ static u32 hv_compose_msi_req_v1(
static u32 hv_compose_msi_req_v2(
struct pci_create_interrupt2 *int_pkt, struct cpumask *affinity,
u32 slot, u8 vector)
u32 slot, u8 vector, u8 vector_count)
{
int cpu;
int_pkt->message_type.type = PCI_CREATE_INTERRUPT_MESSAGE2;
int_pkt->wslot.slot = slot;
int_pkt->int_desc.vector = vector;
int_pkt->int_desc.vector_count = 1;
int_pkt->int_desc.vector_count = vector_count;
int_pkt->int_desc.delivery_mode = dest_Fixed;
/*
@@ -1350,7 +1378,6 @@ static u32 hv_compose_msi_req_v2(
*/
static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
{
struct irq_cfg *cfg = irqd_cfg(data);
struct hv_pcibus_device *hbus;
struct hv_pci_dev *hpdev;
struct pci_bus *pbus;
@@ -1359,6 +1386,8 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
unsigned long flags;
struct compose_comp_ctxt comp;
struct tran_int_desc *int_desc;
struct msi_desc *msi_desc;
u8 vector, vector_count;
struct {
struct pci_packet pci_pkt;
union {
@@ -1370,7 +1399,17 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
u32 size;
int ret;
pdev = msi_desc_to_pci_dev(irq_data_get_msi_desc(data));
/* Reuse the previous allocation */
if (data->chip_data) {
int_desc = data->chip_data;
msg->address_hi = int_desc->address >> 32;
msg->address_lo = int_desc->address & 0xffffffff;
msg->data = int_desc->data;
return;
}
msi_desc = irq_data_get_msi_desc(data);
pdev = msi_desc_to_pci_dev(msi_desc);
dest = irq_data_get_effective_affinity_mask(data);
pbus = pdev->bus;
hbus = container_of(pbus->sysdata, struct hv_pcibus_device, sysdata);
@@ -1378,17 +1417,40 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
if (!hpdev)
goto return_null_message;
/* Free any previous message that might have already been composed. */
if (data->chip_data) {
int_desc = data->chip_data;
data->chip_data = NULL;
hv_int_desc_free(hpdev, int_desc);
}
int_desc = kzalloc(sizeof(*int_desc), GFP_ATOMIC);
if (!int_desc)
goto drop_reference;
if (!msi_desc->msi_attrib.is_msix && msi_desc->nvec_used > 1) {
/*
* If this is not the first MSI of Multi MSI, we already have
* a mapping. Can exit early.
*/
if (msi_desc->irq != data->irq) {
data->chip_data = int_desc;
int_desc->address = msi_desc->msg.address_lo |
(u64)msi_desc->msg.address_hi << 32;
int_desc->data = msi_desc->msg.data +
(data->irq - msi_desc->irq);
msg->address_hi = msi_desc->msg.address_hi;
msg->address_lo = msi_desc->msg.address_lo;
msg->data = int_desc->data;
put_pcichild(hpdev);
return;
}
/*
* The vector we select here is a dummy value. The correct
* value gets sent to the hypervisor in unmask(). This needs
* to be aligned with the count, and also not zero. Multi-msi
* is powers of 2 up to 32, so 32 will always work here.
*/
vector = 32;
vector_count = msi_desc->nvec_used;
} else {
vector = hv_msi_get_int_vector(data);
vector_count = 1;
}
memset(&ctxt, 0, sizeof(ctxt));
init_completion(&comp.comp_pkt.host_event);
ctxt.pci_pkt.completion_func = hv_pci_compose_compl;
@@ -1399,14 +1461,16 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
size = hv_compose_msi_req_v1(&ctxt.int_pkts.v1,
dest,
hpdev->desc.win_slot.slot,
cfg->vector);
vector,
vector_count);
break;
case PCI_PROTOCOL_VERSION_1_2:
size = hv_compose_msi_req_v2(&ctxt.int_pkts.v2,
dest,
hpdev->desc.win_slot.slot,
cfg->vector);
vector,
vector_count);
break;
default:
@@ -1518,7 +1582,7 @@ static irq_hw_number_t hv_msi_domain_ops_get_hwirq(struct msi_domain_info *info,
static struct msi_domain_ops hv_msi_ops = {
.get_hwirq = hv_msi_domain_ops_get_hwirq,
.msi_prepare = pci_msi_prepare,
.msi_prepare = hv_msi_prepare,
.set_desc = pci_msi_set_desc,
.msi_free = hv_msi_free,
};

18
drivers/pinctrl/stm32/pinctrl-stm32.c
View File

@@ -1215,15 +1215,17 @@ static int stm32_gpiolib_register_bank(struct stm32_pinctrl *pctl,
bank->bank_ioport_nr = bank_ioport_nr;
spin_lock_init(&bank->lock);
/* create irq hierarchical domain */
bank->fwnode = of_node_to_fwnode(np);
if (pctl->domain) {
/* create irq hierarchical domain */
bank->fwnode = of_node_to_fwnode(np);
bank->domain = irq_domain_create_hierarchy(pctl->domain, 0,
STM32_GPIO_IRQ_LINE, bank->fwnode,
&stm32_gpio_domain_ops, bank);
bank->domain = irq_domain_create_hierarchy(pctl->domain, 0, STM32_GPIO_IRQ_LINE,
bank->fwnode, &stm32_gpio_domain_ops,
bank);
if (!bank->domain)
return -ENODEV;
if (!bank->domain)
return -ENODEV;
}
err = gpiochip_add_data(&bank->gpio_chip, bank);
if (err) {
@@ -1393,6 +1395,8 @@ int stm32_pctl_probe(struct platform_device *pdev)
pctl->domain = stm32_pctrl_get_irq_domain(np);
if (IS_ERR(pctl->domain))
return PTR_ERR(pctl->domain);
if (!pctl->domain)
dev_warn(dev, "pinctrl without interrupt support\n");
/* hwspinlock is optional */
hwlock_id = of_hwspin_lock_get_id(pdev->dev.of_node, 0);

1
drivers/power/reset/arm-versatile-reboot.c
View File

@@ -146,6 +146,7 @@ static int __init versatile_reboot_probe(void)
versatile_reboot_type = (enum versatile_reboot)reboot_id->data;
syscon_regmap = syscon_node_to_regmap(np);
of_node_put(np);
if (IS_ERR(syscon_regmap))
return PTR_ERR(syscon_regmap);

4
drivers/s390/char/keyboard.h
View File

@@ -56,7 +56,7 @@ static inline void
kbd_put_queue(struct tty_port *port, int ch)
{
tty_insert_flip_char(port, ch, 0);
tty_schedule_flip(port);
tty_flip_buffer_push(port);
}
static inline void
@@ -64,5 +64,5 @@ kbd_puts_queue(struct tty_port *port, char *cp)
{
while (*cp)
tty_insert_flip_char(port, *cp++, 0);
tty_schedule_flip(port);
tty_flip_buffer_push(port);
}

12
drivers/spi/spi-bcm2835.c
View File

@@ -1159,10 +1159,14 @@ static void bcm2835_spi_handle_err(struct spi_controller *ctlr,
struct bcm2835_spi *bs = spi_controller_get_devdata(ctlr);
/* if an error occurred and we have an active dma, then terminate */
dmaengine_terminate_sync(ctlr->dma_tx);
bs->tx_dma_active = false;
dmaengine_terminate_sync(ctlr->dma_rx);
bs->rx_dma_active = false;
if (ctlr->dma_tx) {
dmaengine_terminate_sync(ctlr->dma_tx);
bs->tx_dma_active = false;
}
if (ctlr->dma_rx) {
dmaengine_terminate_sync(ctlr->dma_rx);
bs->rx_dma_active = false;
}
bcm2835_spi_undo_prologue(bs);
/* and reset */

2
drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
View File

@@ -267,6 +267,8 @@ static int rt2880_pinmux_pins(struct rt2880_priv *p)
p->func[i]->pin_count,
sizeof(int),
GFP_KERNEL);
if (!p->func[i]->pins)
return -ENOMEM;
for (j = 0; j < p->func[i]->pin_count; j++)
p->func[i]->pins[j] = p->func[i]->pin_first + j;

4
drivers/staging/speakup/spk_ttyio.c
View File

@@ -88,7 +88,7 @@ static int spk_ttyio_receive_buf2(struct tty_struct *tty,
}
if (!ldisc_data->buf_free)
/* ttyio_in will tty_schedule_flip */
/* ttyio_in will tty_flip_buffer_push */
return 0;
/* Make sure the consumer has read buf before we have seen
@@ -325,7 +325,7 @@ static unsigned char ttyio_in(int timeout)
mb();
ldisc_data->buf_free = true;
/* Let TTY push more characters */
tty_schedule_flip(speakup_tty->port);
tty_flip_buffer_push(speakup_tty->port);
return rv;
}

6
drivers/tty/cyclades.c
View File

@@ -556,7 +556,7 @@ static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
}
info->idle_stats.recv_idle = jiffies;
}
tty_schedule_flip(port);
tty_flip_buffer_push(port);
/* end of service */
cyy_writeb(info, CyRIR, save_xir & 0x3f);
@@ -996,7 +996,7 @@ static void cyz_handle_rx(struct cyclades_port *info)
mod_timer(&info->rx_full_timer, jiffies + 1);
#endif
info->idle_stats.recv_idle = jiffies;
tty_schedule_flip(&info->port);
tty_flip_buffer_push(&info->port);
/* Update rx_get */
cy_writel(&buf_ctrl->rx_get, new_rx_get);
@@ -1172,7 +1172,7 @@ static void cyz_handle_cmd(struct cyclades_card *cinfo)
if (delta_count)
wake_up_interruptible(&info->port.delta_msr_wait);
if (special_count)
tty_schedule_flip(&info->port);
tty_flip_buffer_push(&info->port);
}
}

2
drivers/tty/goldfish.c
View File

@@ -151,7 +151,7 @@ static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
address = (unsigned long)(void *)buf;
goldfish_tty_rw(qtty, address, count, 0);
tty_schedule_flip(&qtty->port);
tty_flip_buffer_push(&qtty->port);
return IRQ_HANDLED;
}

4
drivers/tty/moxa.c
View File

@@ -1385,7 +1385,7 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
if (inited && !tty_throttled(tty) &&
MoxaPortRxQueue(p) > 0) { /* RX */
MoxaPortReadData(p);
tty_schedule_flip(&p->port);
tty_flip_buffer_push(&p->port);
}
} else {
clear_bit(EMPTYWAIT, &p->statusflags);
@@ -1410,7 +1410,7 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
tty_insert_flip_char(&p->port, 0, TTY_BREAK);
tty_schedule_flip(&p->port);
tty_flip_buffer_push(&p->port);
}
if (intr & IntrLine)

14
drivers/tty/pty.c
View File

@@ -111,21 +111,11 @@ static void pty_unthrottle(struct tty_struct *tty)
static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c)
{
struct tty_struct *to = tty->link;
unsigned long flags;
if (tty->stopped)
if (tty->stopped || !c)
return 0;
if (c > 0) {
spin_lock_irqsave(&to->port->lock, flags);
/* Stuff the data into the input queue of the other end */
c = tty_insert_flip_string(to->port, buf, c);
spin_unlock_irqrestore(&to->port->lock, flags);
/* And shovel */
if (c)
tty_flip_buffer_push(to->port);
}
return c;
return tty_insert_flip_string_and_push_buffer(to->port, buf, c);
}
/**

2
drivers/tty/serial/lpc32xx_hs.c
View File

@@ -345,7 +345,7 @@ static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id)
LPC32XX_HSUART_IIR(port->membase));
port->icount.overrun++;
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
tty_schedule_flip(tport);
tty_flip_buffer_push(tport);
}
/* Data received? */

25
drivers/tty/serial/mvebu-uart.c
View File

@@ -443,13 +443,13 @@ static void mvebu_uart_shutdown(struct uart_port *port)
}
}
static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
static unsigned int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
{
unsigned int d_divisor, m_divisor;
u32 brdv, osamp;
if (!port->uartclk)
return -EOPNOTSUPP;
return 0;
/*
* The baudrate is derived from the UART clock thanks to two divisors:
@@ -473,7 +473,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud)
osamp &= ~OSAMP_DIVISORS_MASK;
writel(osamp, port->membase + UART_OSAMP);
return 0;
return DIV_ROUND_CLOSEST(port->uartclk, d_divisor * m_divisor);
}
static void mvebu_uart_set_termios(struct uart_port *port,
@@ -510,15 +510,11 @@ static void mvebu_uart_set_termios(struct uart_port *port,
max_baud = 230400;
baud = uart_get_baud_rate(port, termios, old, min_baud, max_baud);
if (mvebu_uart_baud_rate_set(port, baud)) {
/* No clock available, baudrate cannot be changed */
if (old)
baud = uart_get_baud_rate(port, old, NULL,
min_baud, max_baud);
} else {
tty_termios_encode_baud_rate(termios, baud, baud);
uart_update_timeout(port, termios->c_cflag, baud);
}
baud = mvebu_uart_baud_rate_set(port, baud);
/* In case baudrate cannot be changed, report previous old value */
if (baud == 0 && old)
baud = tty_termios_baud_rate(old);
/* Only the following flag changes are supported */
if (old) {
@@ -529,6 +525,11 @@ static void mvebu_uart_set_termios(struct uart_port *port,
termios->c_cflag |= CS8;
}
if (baud != 0) {
tty_termios_encode_baud_rate(termios, baud, baud);
uart_update_timeout(port, termios->c_cflag, baud);
}
spin_unlock_irqrestore(&port->lock, flags);
}

66
drivers/tty/tty_buffer.c
View File

@@ -394,27 +394,6 @@ int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag)
}
EXPORT_SYMBOL(__tty_insert_flip_char);
/**
* tty_schedule_flip - push characters to ldisc
* @port: tty port to push from
*
* Takes any pending buffers and transfers their ownership to the
* ldisc side of the queue. It then schedules those characters for
* processing by the line discipline.
*/
void tty_schedule_flip(struct tty_port *port)
{
struct tty_bufhead *buf = &port->buf;
/* paired w/ acquire in flush_to_ldisc(); ensures
* flush_to_ldisc() sees buffer data.
*/
smp_store_release(&buf->tail->commit, buf->tail->used);
queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_schedule_flip);
/**
* tty_prepare_flip_string - make room for characters
* @port: tty port
@@ -544,6 +523,15 @@ static void flush_to_ldisc(struct work_struct *work)
}
static inline void tty_flip_buffer_commit(struct tty_buffer *tail)
{
/*
* Paired w/ acquire in flush_to_ldisc(); ensures flush_to_ldisc() sees
* buffer data.
*/
smp_store_release(&tail->commit, tail->used);
}
/**
* tty_flip_buffer_push - terminal
* @port: tty port to push
@@ -557,10 +545,44 @@ static void flush_to_ldisc(struct work_struct *work)
void tty_flip_buffer_push(struct tty_port *port)
{
tty_schedule_flip(port);
struct tty_bufhead *buf = &port->buf;
tty_flip_buffer_commit(buf->tail);
queue_work(system_unbound_wq, &buf->work);
}
EXPORT_SYMBOL(tty_flip_buffer_push);
/**
* tty_insert_flip_string_and_push_buffer - add characters to the tty buffer and
* push
* @port: tty port
* @chars: characters
* @size: size
*
* The function combines tty_insert_flip_string() and tty_flip_buffer_push()
* with the exception of properly holding the @port->lock.
*
* To be used only internally (by pty currently).
*
* Returns: the number added.
*/
int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
const unsigned char *chars, size_t size)
{
struct tty_bufhead *buf = &port->buf;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
size = tty_insert_flip_string(port, chars, size);
if (size)
tty_flip_buffer_commit(buf->tail);
spin_unlock_irqrestore(&port->lock, flags);
queue_work(system_unbound_wq, &buf->work);
return size;
}
/**
* tty_buffer_init - prepare a tty buffer structure
* @tty: tty to initialise

6
drivers/tty/vt/keyboard.c
View File

@@ -310,7 +310,7 @@ int kbd_rate(struct kbd_repeat *rpt)
static void put_queue(struct vc_data *vc, int ch)
{
tty_insert_flip_char(&vc->port, ch, 0);
tty_schedule_flip(&vc->port);
tty_flip_buffer_push(&vc->port);
}
static void puts_queue(struct vc_data *vc, char *cp)
@@ -319,7 +319,7 @@ static void puts_queue(struct vc_data *vc, char *cp)
tty_insert_flip_char(&vc->port, *cp, 0);
cp++;
}
tty_schedule_flip(&vc->port);
tty_flip_buffer_push(&vc->port);
}
static void applkey(struct vc_data *vc, int key, char mode)
@@ -564,7 +564,7 @@ static void fn_inc_console(struct vc_data *vc)
static void fn_send_intr(struct vc_data *vc)
{
tty_insert_flip_char(&vc->port, 0, TTY_BREAK);
tty_schedule_flip(&vc->port);
tty_flip_buffer_push(&vc->port);
}
static void fn_scroll_forw(struct vc_data *vc)

2
drivers/tty/vt/vt.c
View File

@@ -1837,7 +1837,7 @@ static void respond_string(const char *p, struct tty_port *port)
tty_insert_flip_char(port, *p, 0);
p++;
}
tty_schedule_flip(port);
tty_flip_buffer_push(port);
}
static void cursor_report(struct vc_data *vc, struct tty_struct *tty)

3
drivers/xen/gntdev.c
View File

@@ -413,7 +413,8 @@ static void __unmap_grant_pages_done(int result,
unsigned int offset = data->unmap_ops - map->unmap_ops;
for (i = 0; i < data->count; i++) {
WARN_ON(map->unmap_ops[offset+i].status);
WARN_ON(map->unmap_ops[offset+i].status &&
map->unmap_ops[offset+i].handle != -1);
pr_debug("unmap handle=%d st=%d\n",
map->unmap_ops[offset+i].handle,
map->unmap_ops[offset+i].status);

3
fs/dlm/lock.c
View File

@@ -4067,13 +4067,14 @@ static void send_repeat_remove(struct dlm_ls *ls, char *ms_name, int len)
rv = _create_message(ls, sizeof(struct dlm_message) + len,
dir_nodeid, DLM_MSG_REMOVE, &ms, &mh);
if (rv)
return;
goto out;
memcpy(ms->m_extra, name, len);
ms->m_hash = hash;
send_message(mh, ms);
out:
spin_lock(&ls->ls_remove_spin);
ls->ls_remove_len = 0;
memset(ls->ls_remove_name, 0, DLM_RESNAME_MAXLEN);

19
include/linux/bitfield.h
View File

@@ -41,6 +41,22 @@
#define __bf_shf(x) (__builtin_ffsll(x) - 1)
#define __scalar_type_to_unsigned_cases(type) \
unsigned type: (unsigned type)0, \
signed type: (unsigned type)0
#define __unsigned_scalar_typeof(x) typeof( \
_Generic((x), \
char: (unsigned char)0, \
__scalar_type_to_unsigned_cases(char), \
__scalar_type_to_unsigned_cases(short), \
__scalar_type_to_unsigned_cases(int), \
__scalar_type_to_unsigned_cases(long), \
__scalar_type_to_unsigned_cases(long long), \
default: (x)))
#define __bf_cast_unsigned(type, x) ((__unsigned_scalar_typeof(type))(x))
#define __BF_FIELD_CHECK(_mask, _reg, _val, _pfx) \
({ \
BUILD_BUG_ON_MSG(!__builtin_constant_p(_mask), \
@@ -49,7 +65,8 @@
BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \
~((_mask) >> __bf_shf(_mask)) & (_val) : 0, \
_pfx "value too large for the field"); \
BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \
BUILD_BUG_ON_MSG(__bf_cast_unsigned(_mask, _mask) > \
__bf_cast_unsigned(_reg, ~0ull), \
_pfx "type of reg too small for mask"); \
__BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + \
(1ULL << __bf_shf(_mask))); \

1
include/linux/mm.h
View File

@@ -15,6 +15,7 @@
#include <linux/atomic.h>
#include <linux/debug_locks.h>
#include <linux/mm_types.h>
#include <linux/mmap_lock.h>
#include <linux/range.h>
#include <linux/pfn.h>
#include <linux/percpu-refcount.h>

54
include/linux/mmap_lock.h Normal file
View File

@@ -0,0 +1,54 @@
#ifndef _LINUX_MMAP_LOCK_H
#define _LINUX_MMAP_LOCK_H
static inline void mmap_init_lock(struct mm_struct *mm)
{
init_rwsem(&mm->mmap_sem);
}
static inline void mmap_write_lock(struct mm_struct *mm)
{
down_write(&mm->mmap_sem);
}
static inline int mmap_write_lock_killable(struct mm_struct *mm)
{
return down_write_killable(&mm->mmap_sem);
}
static inline bool mmap_write_trylock(struct mm_struct *mm)
{
return down_write_trylock(&mm->mmap_sem) != 0;
}
static inline void mmap_write_unlock(struct mm_struct *mm)
{
up_write(&mm->mmap_sem);
}
static inline void mmap_write_downgrade(struct mm_struct *mm)
{
downgrade_write(&mm->mmap_sem);
}
static inline void mmap_read_lock(struct mm_struct *mm)
{
down_read(&mm->mmap_sem);
}
static inline int mmap_read_lock_killable(struct mm_struct *mm)
{
return down_read_killable(&mm->mmap_sem);
}
static inline bool mmap_read_trylock(struct mm_struct *mm)
{
return down_read_trylock(&mm->mmap_sem) != 0;
}
static inline void mmap_read_unlock(struct mm_struct *mm)
{
up_read(&mm->mmap_sem);
}
#endif /* _LINUX_MMAP_LOCK_H */

273
include/linux/refcount.h
View File

@@ -1,9 +1,88 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Variant of atomic_t specialized for reference counts.
*
* The interface matches the atomic_t interface (to aid in porting) but only
* provides the few functions one should use for reference counting.
*
* Saturation semantics
* ====================
*
* refcount_t differs from atomic_t in that the counter saturates at
* REFCOUNT_SATURATED and will not move once there. This avoids wrapping the
* counter and causing 'spurious' use-after-free issues. In order to avoid the
* cost associated with introducing cmpxchg() loops into all of the saturating
* operations, we temporarily allow the counter to take on an unchecked value
* and then explicitly set it to REFCOUNT_SATURATED on detecting that underflow
* or overflow has occurred. Although this is racy when multiple threads
* access the refcount concurrently, by placing REFCOUNT_SATURATED roughly
* equidistant from 0 and INT_MAX we minimise the scope for error:
*
* INT_MAX REFCOUNT_SATURATED UINT_MAX
* 0 (0x7fff_ffff) (0xc000_0000) (0xffff_ffff)
* +--------------------------------+----------------+----------------+
* <---------- bad value! ---------->
*
* (in a signed view of the world, the "bad value" range corresponds to
* a negative counter value).
*
* As an example, consider a refcount_inc() operation that causes the counter
* to overflow:
*
* int old = atomic_fetch_add_relaxed(r);
* // old is INT_MAX, refcount now INT_MIN (0x8000_0000)
* if (old < 0)
* atomic_set(r, REFCOUNT_SATURATED);
*
* If another thread also performs a refcount_inc() operation between the two
* atomic operations, then the count will continue to edge closer to 0. If it
* reaches a value of 1 before /any/ of the threads reset it to the saturated
* value, then a concurrent refcount_dec_and_test() may erroneously free the
* underlying object. Given the precise timing details involved with the
* round-robin scheduling of each thread manipulating the refcount and the need
* to hit the race multiple times in succession, there doesn't appear to be a
* practical avenue of attack even if using refcount_add() operations with
* larger increments.
*
* Memory ordering
* ===============
*
* Memory ordering rules are slightly relaxed wrt regular atomic_t functions
* and provide only what is strictly required for refcounts.
*
* The increments are fully relaxed; these will not provide ordering. The
* rationale is that whatever is used to obtain the object we're increasing the
* reference count on will provide the ordering. For locked data structures,
* its the lock acquire, for RCU/lockless data structures its the dependent
* load.
*
* Do note that inc_not_zero() provides a control dependency which will order
* future stores against the inc, this ensures we'll never modify the object
* if we did not in fact acquire a reference.
*
* The decrements will provide release order, such that all the prior loads and
* stores will be issued before, it also provides a control dependency, which
* will order us against the subsequent free().
*
* The control dependency is against the load of the cmpxchg (ll/sc) that
* succeeded. This means the stores aren't fully ordered, but this is fine
* because the 1->0 transition indicates no concurrency.
*
* Note that the allocator is responsible for ordering things between free()
* and alloc().
*
* The decrements dec_and_test() and sub_and_test() also provide acquire
* ordering on success.
*
*/
#ifndef _LINUX_REFCOUNT_H
#define _LINUX_REFCOUNT_H
#include <linux/atomic.h>
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/limits.h>
#include <linux/spinlock_types.h>
struct mutex;
@@ -12,7 +91,7 @@ struct mutex;
* struct refcount_t - variant of atomic_t specialized for reference counts
* @refs: atomic_t counter field
*
* The counter saturates at UINT_MAX and will not move once
* The counter saturates at REFCOUNT_SATURATED and will not move once
* there. This avoids wrapping the counter and causing 'spurious'
* use-after-free bugs.
*/
@@ -21,13 +100,25 @@ typedef struct refcount_struct {
} refcount_t;
#define REFCOUNT_INIT(n) { .refs = ATOMIC_INIT(n), }
#define REFCOUNT_MAX INT_MAX
#define REFCOUNT_SATURATED (INT_MIN / 2)
enum refcount_saturation_type {
REFCOUNT_ADD_NOT_ZERO_OVF,
REFCOUNT_ADD_OVF,
REFCOUNT_ADD_UAF,
REFCOUNT_SUB_UAF,
REFCOUNT_DEC_LEAK,
};
void refcount_warn_saturate(refcount_t *r, enum refcount_saturation_type t);
/**
* refcount_set - set a refcount's value
* @r: the refcount
* @n: value to which the refcount will be set
*/
static inline void refcount_set(refcount_t *r, unsigned int n)
static inline void refcount_set(refcount_t *r, int n)
{
atomic_set(&r->refs, n);
}
@@ -43,70 +134,168 @@ static inline unsigned int refcount_read(const refcount_t *r)
return atomic_read(&r->refs);
}
extern __must_check bool refcount_add_not_zero_checked(unsigned int i, refcount_t *r);
extern void refcount_add_checked(unsigned int i, refcount_t *r);
extern __must_check bool refcount_inc_not_zero_checked(refcount_t *r);
extern void refcount_inc_checked(refcount_t *r);
extern __must_check bool refcount_sub_and_test_checked(unsigned int i, refcount_t *r);
extern __must_check bool refcount_dec_and_test_checked(refcount_t *r);
extern void refcount_dec_checked(refcount_t *r);
#ifdef CONFIG_REFCOUNT_FULL
#define refcount_add_not_zero refcount_add_not_zero_checked
#define refcount_add refcount_add_checked
#define refcount_inc_not_zero refcount_inc_not_zero_checked
#define refcount_inc refcount_inc_checked
#define refcount_sub_and_test refcount_sub_and_test_checked
#define refcount_dec_and_test refcount_dec_and_test_checked
#define refcount_dec refcount_dec_checked
#else
# ifdef CONFIG_ARCH_HAS_REFCOUNT
# include <asm/refcount.h>
# else
static inline __must_check bool refcount_add_not_zero(unsigned int i, refcount_t *r)
/**
* refcount_add_not_zero - add a value to a refcount unless it is 0
* @i: the value to add to the refcount
* @r: the refcount
*
* Will saturate at REFCOUNT_SATURATED and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_inc(), or one of its variants, should instead be used to
* increment a reference count.
*
* Return: false if the passed refcount is 0, true otherwise
*/
static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
{
return atomic_add_unless(&r->refs, i, 0);
int old = refcount_read(r);
do {
if (!old)
break;
} while (!atomic_try_cmpxchg_relaxed(&r->refs, &old, old + i));
if (unlikely(old < 0 || old + i < 0))
refcount_warn_saturate(r, REFCOUNT_ADD_NOT_ZERO_OVF);
return old;
}
static inline void refcount_add(unsigned int i, refcount_t *r)
/**
* refcount_add - add a value to a refcount
* @i: the value to add to the refcount
* @r: the refcount
*
* Similar to atomic_add(), but will saturate at REFCOUNT_SATURATED and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_inc(), or one of its variants, should instead be used to
* increment a reference count.
*/
static inline void refcount_add(int i, refcount_t *r)
{
atomic_add(i, &r->refs);
int old = atomic_fetch_add_relaxed(i, &r->refs);
if (unlikely(!old))
refcount_warn_saturate(r, REFCOUNT_ADD_UAF);
else if (unlikely(old < 0 || old + i < 0))
refcount_warn_saturate(r, REFCOUNT_ADD_OVF);
}
/**
* refcount_inc_not_zero - increment a refcount unless it is 0
* @r: the refcount to increment
*
* Similar to atomic_inc_not_zero(), but will saturate at REFCOUNT_SATURATED
* and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Return: true if the increment was successful, false otherwise
*/
static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
{
return atomic_add_unless(&r->refs, 1, 0);
return refcount_add_not_zero(1, r);
}
/**
* refcount_inc - increment a refcount
* @r: the refcount to increment
*
* Similar to atomic_inc(), but will saturate at REFCOUNT_SATURATED and WARN.
*
* Provides no memory ordering, it is assumed the caller already has a
* reference on the object.
*
* Will WARN if the refcount is 0, as this represents a possible use-after-free
* condition.
*/
static inline void refcount_inc(refcount_t *r)
{
atomic_inc(&r->refs);
refcount_add(1, r);
}
static inline __must_check bool refcount_sub_and_test(unsigned int i, refcount_t *r)
/**
* refcount_sub_and_test - subtract from a refcount and test if it is 0
* @i: amount to subtract from the refcount
* @r: the refcount
*
* Similar to atomic_dec_and_test(), but it will WARN, return false and
* ultimately leak on underflow and will fail to decrement when saturated
* at REFCOUNT_SATURATED.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides an acquire ordering on success such that free()
* must come after.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_dec(), or one of its variants, should instead be used to
* decrement a reference count.
*
* Return: true if the resulting refcount is 0, false otherwise
*/
static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
{
return atomic_sub_and_test(i, &r->refs);
int old = atomic_fetch_sub_release(i, &r->refs);
if (old == i) {
smp_acquire__after_ctrl_dep();
return true;
}
if (unlikely(old < 0 || old - i < 0))
refcount_warn_saturate(r, REFCOUNT_SUB_UAF);
return false;
}
/**
* refcount_dec_and_test - decrement a refcount and test if it is 0
* @r: the refcount
*
* Similar to atomic_dec_and_test(), it will WARN on underflow and fail to
* decrement when saturated at REFCOUNT_SATURATED.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides an acquire ordering on success such that free()
* must come after.
*
* Return: true if the resulting refcount is 0, false otherwise
*/
static inline __must_check bool refcount_dec_and_test(refcount_t *r)
{
return atomic_dec_and_test(&r->refs);
return refcount_sub_and_test(1, r);
}
/**
* refcount_dec - decrement a refcount
* @r: the refcount
*
* Similar to atomic_dec(), it will WARN on underflow and fail to decrement
* when saturated at REFCOUNT_SATURATED.
*
* Provides release memory ordering, such that prior loads and stores are done
* before.
*/
static inline void refcount_dec(refcount_t *r)
{
atomic_dec(&r->refs);
if (unlikely(atomic_fetch_sub_release(1, &r->refs) <= 1))
refcount_warn_saturate(r, REFCOUNT_DEC_LEAK);
}
# endif /* !CONFIG_ARCH_HAS_REFCOUNT */
#endif /* CONFIG_REFCOUNT_FULL */
extern __must_check bool refcount_dec_if_one(refcount_t *r);
extern __must_check bool refcount_dec_not_one(refcount_t *r);

4
include/linux/tty_flip.h
View File

@@ -12,7 +12,6 @@ extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
extern int tty_prepare_flip_string(struct tty_port *port,
unsigned char **chars, size_t size);
extern void tty_flip_buffer_push(struct tty_port *port);
void tty_schedule_flip(struct tty_port *port);
int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
static inline int tty_insert_flip_char(struct tty_port *port,
@@ -40,4 +39,7 @@ static inline int tty_insert_flip_string(struct tty_port *port,
extern void tty_buffer_lock_exclusive(struct tty_port *port);
extern void tty_buffer_unlock_exclusive(struct tty_port *port);
int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
const unsigned char *chars, size_t cnt);
#endif /* _LINUX_TTY_FLIP_H */

65
include/net/bluetooth/bluetooth.h
View File

@@ -370,6 +370,71 @@ out:
return NULL;
}
/* Shall not be called with lock_sock held */
static inline struct sk_buff *bt_skb_sendmsg(struct sock *sk,
struct msghdr *msg,
size_t len, size_t mtu,
size_t headroom, size_t tailroom)
{
struct sk_buff *skb;
size_t size = min_t(size_t, len, mtu);
int err;
skb = bt_skb_send_alloc(sk, size + headroom + tailroom,
msg->msg_flags & MSG_DONTWAIT, &err);
if (!skb)
return ERR_PTR(err);
skb_reserve(skb, headroom);
skb_tailroom_reserve(skb, mtu, tailroom);
if (!copy_from_iter_full(skb_put(skb, size), size, &msg->msg_iter)) {
kfree_skb(skb);
return ERR_PTR(-EFAULT);
}
skb->priority = sk->sk_priority;
return skb;
}
/* Similar to bt_skb_sendmsg but can split the msg into multiple fragments
* accourding to the MTU.
*/
static inline struct sk_buff *bt_skb_sendmmsg(struct sock *sk,
struct msghdr *msg,
size_t len, size_t mtu,
size_t headroom, size_t tailroom)
{
struct sk_buff *skb, **frag;
skb = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
if (IS_ERR_OR_NULL(skb))
return skb;
len -= skb->len;
if (!len)
return skb;
/* Add remaining data over MTU as continuation fragments */
frag = &skb_shinfo(skb)->frag_list;
while (len) {
struct sk_buff *tmp;
tmp = bt_skb_sendmsg(sk, msg, len, mtu, headroom, tailroom);
if (IS_ERR(tmp)) {
return skb;
}
len -= tmp->len;
*frag = tmp;
frag = &(*frag)->next;
}
return skb;
}
int bt_to_errno(u16 code);
void hci_sock_set_flag(struct sock *sk, int nr);

5
include/net/inet_sock.h
View File

@@ -107,7 +107,8 @@ static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk)
static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb)
{
if (!sk->sk_mark && sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept)
if (!sk->sk_mark &&
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept))
return skb->mark;
return sk->sk_mark;
@@ -375,7 +376,7 @@ static inline bool inet_get_convert_csum(struct sock *sk)
static inline bool inet_can_nonlocal_bind(struct net *net,
struct inet_sock *inet)
{
return net->ipv4.sysctl_ip_nonlocal_bind ||
return READ_ONCE(net->ipv4.sysctl_ip_nonlocal_bind) ||
inet->freebind || inet->transparent;
}

4
include/net/ip.h
View File

@@ -395,7 +395,7 @@ void ipfrag_init(void);
void ip_static_sysctl_init(void);
#define IP4_REPLY_MARK(net, mark) \
((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
(READ_ONCE((net)->ipv4.sysctl_fwmark_reflect) ? (mark) : 0)
static inline bool ip_is_fragment(const struct iphdr *iph)
{
@@ -456,7 +456,7 @@ static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
struct net *net = dev_net(dst->dev);
unsigned int mtu;
if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
if (READ_ONCE(net->ipv4.sysctl_ip_fwd_use_pmtu) ||
ip_mtu_locked(dst) ||
!forwarding)
return dst_mtu(dst);

9
include/net/tcp.h
View File

@@ -1367,8 +1367,8 @@ static inline void tcp_slow_start_after_idle_check(struct sock *sk)
struct tcp_sock *tp = tcp_sk(sk);
s32 delta;
if (!sock_net(sk)->ipv4.sysctl_tcp_slow_start_after_idle || tp->packets_out ||
ca_ops->cong_control)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_slow_start_after_idle) ||
tp->packets_out || ca_ops->cong_control)
return;
delta = tcp_jiffies32 - tp->lsndtime;
if (delta > inet_csk(sk)->icsk_rto)
@@ -1459,7 +1459,8 @@ static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
static inline int tcp_fin_time(const struct sock *sk)
{
int fin_timeout = tcp_sk(sk)->linger2 ? : sock_net(sk)->ipv4.sysctl_tcp_fin_timeout;
int fin_timeout = tcp_sk(sk)->linger2 ? :
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fin_timeout);
const int rto = inet_csk(sk)->icsk_rto;
if (fin_timeout < (rto << 2) - (rto >> 1))
@@ -1940,7 +1941,7 @@ void __tcp_v4_send_check(struct sk_buff *skb, __be32 saddr, __be32 daddr);
static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
{
struct net *net = sock_net((struct sock *)tp);
return tp->notsent_lowat ?: net->ipv4.sysctl_tcp_notsent_lowat;
return tp->notsent_lowat ?: READ_ONCE(net->ipv4.sysctl_tcp_notsent_lowat);
}
/* @wake is one when sk_stream_write_space() calls us.

2
include/net/udp.h
View File

@@ -252,7 +252,7 @@ static inline bool udp_sk_bound_dev_eq(struct net *net, int bound_dev_if,
int dif, int sdif)
{
#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
return inet_bound_dev_eq(!!net->ipv4.sysctl_udp_l3mdev_accept,
return inet_bound_dev_eq(!!READ_ONCE(net->ipv4.sysctl_udp_l3mdev_accept),
bound_dev_if, dif, sdif);
#else
return inet_bound_dev_eq(true, bound_dev_if, dif, sdif);

8
kernel/bpf/core.c
View File

@@ -64,11 +64,13 @@ void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb, int k, uns
{
u8 *ptr = NULL;
if (k >= SKF_NET_OFF)
if (k >= SKF_NET_OFF) {
ptr = skb_network_header(skb) + k - SKF_NET_OFF;
else if (k >= SKF_LL_OFF)
} else if (k >= SKF_LL_OFF) {
if (unlikely(!skb_mac_header_was_set(skb)))
return NULL;
ptr = skb_mac_header(skb) + k - SKF_LL_OFF;
}
if (ptr >= skb->head && ptr + size <= skb_tail_pointer(skb))
return ptr;

45
kernel/events/core.c
View File

@@ -5835,10 +5835,10 @@ again:
if (!atomic_inc_not_zero(&event->rb->mmap_count)) {
/*
* Raced against perf_mmap_close() through
* perf_event_set_output(). Try again, hope for better
* luck.
* Raced against perf_mmap_close(); remove the
* event and try again.
*/
ring_buffer_attach(event, NULL);
mutex_unlock(&event->mmap_mutex);
goto again;
}
@@ -10790,14 +10790,25 @@ err_size:
goto out;
}
static void mutex_lock_double(struct mutex *a, struct mutex *b)
{
if (b < a)
swap(a, b);
mutex_lock(a);
mutex_lock_nested(b, SINGLE_DEPTH_NESTING);
}
static int
perf_event_set_output(struct perf_event *event, struct perf_event *output_event)
{
struct ring_buffer *rb = NULL;
int ret = -EINVAL;
if (!output_event)
if (!output_event) {
mutex_lock(&event->mmap_mutex);
goto set;
}
/* don't allow circular references */
if (event == output_event)
@@ -10835,8 +10846,15 @@ perf_event_set_output(struct perf_event *event, struct perf_event *output_event)
event->pmu != output_event->pmu)
goto out;
/*
* Hold both mmap_mutex to serialize against perf_mmap_close(). Since
* output_event is already on rb->event_list, and the list iteration
* restarts after every removal, it is guaranteed this new event is
* observed *OR* if output_event is already removed, it's guaranteed we
* observe !rb->mmap_count.
*/
mutex_lock_double(&event->mmap_mutex, &output_event->mmap_mutex);
set:
mutex_lock(&event->mmap_mutex);
/* Can't redirect output if we've got an active mmap() */
if (atomic_read(&event->mmap_count))
goto unlock;
@@ -10846,6 +10864,12 @@ set:
rb = ring_buffer_get(output_event);
if (!rb)
goto unlock;
/* did we race against perf_mmap_close() */
if (!atomic_read(&rb->mmap_count)) {
ring_buffer_put(rb);
goto unlock;
}
}
ring_buffer_attach(event, rb);
@@ -10853,20 +10877,13 @@ set:
ret = 0;
unlock:
mutex_unlock(&event->mmap_mutex);
if (output_event)
mutex_unlock(&output_event->mmap_mutex);
out:
return ret;
}
static void mutex_lock_double(struct mutex *a, struct mutex *b)
{
if (b < a)
swap(a, b);
mutex_lock(a);
mutex_lock_nested(b, SINGLE_DEPTH_NESTING);
}
static int perf_event_set_clock(struct perf_event *event, clockid_t clk_id)
{
bool nmi_safe = false;

255
lib/refcount.c
View File

@@ -1,41 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Variant of atomic_t specialized for reference counts.
*
* The interface matches the atomic_t interface (to aid in porting) but only
* provides the few functions one should use for reference counting.
*
* It differs in that the counter saturates at UINT_MAX and will not move once
* there. This avoids wrapping the counter and causing 'spurious'
* use-after-free issues.
*
* Memory ordering rules are slightly relaxed wrt regular atomic_t functions
* and provide only what is strictly required for refcounts.
*
* The increments are fully relaxed; these will not provide ordering. The
* rationale is that whatever is used to obtain the object we're increasing the
* reference count on will provide the ordering. For locked data structures,
* its the lock acquire, for RCU/lockless data structures its the dependent
* load.
*
* Do note that inc_not_zero() provides a control dependency which will order
* future stores against the inc, this ensures we'll never modify the object
* if we did not in fact acquire a reference.
*
* The decrements will provide release order, such that all the prior loads and
* stores will be issued before, it also provides a control dependency, which
* will order us against the subsequent free().
*
* The control dependency is against the load of the cmpxchg (ll/sc) that
* succeeded. This means the stores aren't fully ordered, but this is fine
* because the 1->0 transition indicates no concurrency.
*
* Note that the allocator is responsible for ordering things between free()
* and alloc().
*
* The decrements dec_and_test() and sub_and_test() also provide acquire
* ordering on success.
*
* Out-of-line refcount functions.
*/
#include <linux/mutex.h>
@@ -43,199 +8,33 @@
#include <linux/spinlock.h>
#include <linux/bug.h>
/**
* refcount_add_not_zero_checked - add a value to a refcount unless it is 0
* @i: the value to add to the refcount
* @r: the refcount
*
* Will saturate at UINT_MAX and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_inc(), or one of its variants, should instead be used to
* increment a reference count.
*
* Return: false if the passed refcount is 0, true otherwise
*/
bool refcount_add_not_zero_checked(unsigned int i, refcount_t *r)
#define REFCOUNT_WARN(str) WARN_ONCE(1, "refcount_t: " str ".\n")
void refcount_warn_saturate(refcount_t *r, enum refcount_saturation_type t)
{
unsigned int new, val = atomic_read(&r->refs);
refcount_set(r, REFCOUNT_SATURATED);
do {
if (!val)
return false;
if (unlikely(val == UINT_MAX))
return true;
new = val + i;
if (new < val)
new = UINT_MAX;
} while (!atomic_try_cmpxchg_relaxed(&r->refs, &val, new));
WARN_ONCE(new == UINT_MAX, "refcount_t: saturated; leaking memory.\n");
return true;
}
EXPORT_SYMBOL(refcount_add_not_zero_checked);
/**
* refcount_add_checked - add a value to a refcount
* @i: the value to add to the refcount
* @r: the refcount
*
* Similar to atomic_add(), but will saturate at UINT_MAX and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_inc(), or one of its variants, should instead be used to
* increment a reference count.
*/
void refcount_add_checked(unsigned int i, refcount_t *r)
{
WARN_ONCE(!refcount_add_not_zero_checked(i, r), "refcount_t: addition on 0; use-after-free.\n");
}
EXPORT_SYMBOL(refcount_add_checked);
/**
* refcount_inc_not_zero_checked - increment a refcount unless it is 0
* @r: the refcount to increment
*
* Similar to atomic_inc_not_zero(), but will saturate at UINT_MAX and WARN.
*
* Provides no memory ordering, it is assumed the caller has guaranteed the
* object memory to be stable (RCU, etc.). It does provide a control dependency
* and thereby orders future stores. See the comment on top.
*
* Return: true if the increment was successful, false otherwise
*/
bool refcount_inc_not_zero_checked(refcount_t *r)
{
unsigned int new, val = atomic_read(&r->refs);
do {
new = val + 1;
if (!val)
return false;
if (unlikely(!new))
return true;
} while (!atomic_try_cmpxchg_relaxed(&r->refs, &val, new));
WARN_ONCE(new == UINT_MAX, "refcount_t: saturated; leaking memory.\n");
return true;
}
EXPORT_SYMBOL(refcount_inc_not_zero_checked);
/**
* refcount_inc_checked - increment a refcount
* @r: the refcount to increment
*
* Similar to atomic_inc(), but will saturate at UINT_MAX and WARN.
*
* Provides no memory ordering, it is assumed the caller already has a
* reference on the object.
*
* Will WARN if the refcount is 0, as this represents a possible use-after-free
* condition.
*/
void refcount_inc_checked(refcount_t *r)
{
WARN_ONCE(!refcount_inc_not_zero_checked(r), "refcount_t: increment on 0; use-after-free.\n");
}
EXPORT_SYMBOL(refcount_inc_checked);
/**
* refcount_sub_and_test_checked - subtract from a refcount and test if it is 0
* @i: amount to subtract from the refcount
* @r: the refcount
*
* Similar to atomic_dec_and_test(), but it will WARN, return false and
* ultimately leak on underflow and will fail to decrement when saturated
* at UINT_MAX.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides an acquire ordering on success such that free()
* must come after.
*
* Use of this function is not recommended for the normal reference counting
* use case in which references are taken and released one at a time. In these
* cases, refcount_dec(), or one of its variants, should instead be used to
* decrement a reference count.
*
* Return: true if the resulting refcount is 0, false otherwise
*/
bool refcount_sub_and_test_checked(unsigned int i, refcount_t *r)
{
unsigned int new, val = atomic_read(&r->refs);
do {
if (unlikely(val == UINT_MAX))
return false;
new = val - i;
if (new > val) {
WARN_ONCE(new > val, "refcount_t: underflow; use-after-free.\n");
return false;
}
} while (!atomic_try_cmpxchg_release(&r->refs, &val, new));
if (!new) {
smp_acquire__after_ctrl_dep();
return true;
switch (t) {
case REFCOUNT_ADD_NOT_ZERO_OVF:
REFCOUNT_WARN("saturated; leaking memory");
break;
case REFCOUNT_ADD_OVF:
REFCOUNT_WARN("saturated; leaking memory");
break;
case REFCOUNT_ADD_UAF:
REFCOUNT_WARN("addition on 0; use-after-free");
break;
case REFCOUNT_SUB_UAF:
REFCOUNT_WARN("underflow; use-after-free");
break;
case REFCOUNT_DEC_LEAK:
REFCOUNT_WARN("decrement hit 0; leaking memory");
break;
default:
REFCOUNT_WARN("unknown saturation event!?");
}
return false;
}
EXPORT_SYMBOL(refcount_sub_and_test_checked);
/**
* refcount_dec_and_test_checked - decrement a refcount and test if it is 0
* @r: the refcount
*
* Similar to atomic_dec_and_test(), it will WARN on underflow and fail to
* decrement when saturated at UINT_MAX.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides an acquire ordering on success such that free()
* must come after.
*
* Return: true if the resulting refcount is 0, false otherwise
*/
bool refcount_dec_and_test_checked(refcount_t *r)
{
return refcount_sub_and_test_checked(1, r);
}
EXPORT_SYMBOL(refcount_dec_and_test_checked);
/**
* refcount_dec_checked - decrement a refcount
* @r: the refcount
*
* Similar to atomic_dec(), it will WARN on underflow and fail to decrement
* when saturated at UINT_MAX.
*
* Provides release memory ordering, such that prior loads and stores are done
* before.
*/
void refcount_dec_checked(refcount_t *r)
{
WARN_ONCE(refcount_dec_and_test_checked(r), "refcount_t: decrement hit 0; leaking memory.\n");
}
EXPORT_SYMBOL(refcount_dec_checked);
EXPORT_SYMBOL(refcount_warn_saturate);
/**
* refcount_dec_if_one - decrement a refcount if it is 1
@@ -277,7 +76,7 @@ bool refcount_dec_not_one(refcount_t *r)
unsigned int new, val = atomic_read(&r->refs);
do {
if (unlikely(val == UINT_MAX))
if (unlikely(val == REFCOUNT_SATURATED))
return true;
if (val == 1)
@@ -302,7 +101,7 @@ EXPORT_SYMBOL(refcount_dec_not_one);
* @lock: the mutex to be locked
*
* Similar to atomic_dec_and_mutex_lock(), it will WARN on underflow and fail
* to decrement when saturated at UINT_MAX.
* to decrement when saturated at REFCOUNT_SATURATED.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides a control dependency such that free() must come after.
@@ -333,7 +132,7 @@ EXPORT_SYMBOL(refcount_dec_and_mutex_lock);
* @lock: the spinlock to be locked
*
* Similar to atomic_dec_and_lock(), it will WARN on underflow and fail to
* decrement when saturated at UINT_MAX.
* decrement when saturated at REFCOUNT_SATURATED.
*
* Provides release memory ordering, such that prior loads and stores are done
* before, and provides a control dependency such that free() must come after.

2
mm/mempolicy.c
View File

@@ -348,7 +348,7 @@ static void mpol_rebind_preferred(struct mempolicy *pol,
*/
static void mpol_rebind_policy(struct mempolicy *pol, const nodemask_t *newmask)
{
if (!pol)
if (!pol || pol->mode == MPOL_LOCAL)
return;
if (!mpol_store_user_nodemask(pol) && !(pol->flags & MPOL_F_LOCAL) &&
nodes_equal(pol->w.cpuset_mems_allowed, *newmask))

52
net/bluetooth/rfcomm/core.c
View File

@@ -553,22 +553,58 @@ struct rfcomm_dlc *rfcomm_dlc_exists(bdaddr_t *src, bdaddr_t *dst, u8 channel)
return dlc;
}
int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
static int rfcomm_dlc_send_frag(struct rfcomm_dlc *d, struct sk_buff *frag)
{
int len = skb->len;
if (d->state != BT_CONNECTED)
return -ENOTCONN;
int len = frag->len;
BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len);
if (len > d->mtu)
return -EINVAL;
rfcomm_make_uih(skb, d->addr);
skb_queue_tail(&d->tx_queue, skb);
rfcomm_make_uih(frag, d->addr);
__skb_queue_tail(&d->tx_queue, frag);
if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags))
return len;
}
int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
{
unsigned long flags;
struct sk_buff *frag, *next;
int len;
if (d->state != BT_CONNECTED)
return -ENOTCONN;
frag = skb_shinfo(skb)->frag_list;
skb_shinfo(skb)->frag_list = NULL;
/* Queue all fragments atomically. */
spin_lock_irqsave(&d->tx_queue.lock, flags);
len = rfcomm_dlc_send_frag(d, skb);
if (len < 0 || !frag)
goto unlock;
for (; frag; frag = next) {
int ret;
next = frag->next;
ret = rfcomm_dlc_send_frag(d, frag);
if (ret < 0) {
kfree_skb(frag);
goto unlock;
}
len += ret;
}
unlock:
spin_unlock_irqrestore(&d->tx_queue.lock, flags);
if (len > 0 && !test_bit(RFCOMM_TX_THROTTLED, &d->flags))
rfcomm_schedule();
return len;
}

50
net/bluetooth/rfcomm/sock.c
View File

@@ -578,47 +578,21 @@ static int rfcomm_sock_sendmsg(struct socket *sock, struct msghdr *msg,
lock_sock(sk);
sent = bt_sock_wait_ready(sk, msg->msg_flags);
if (sent)
goto done;
while (len) {
size_t size = min_t(size_t, len, d->mtu);
int err;
skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE,
msg->msg_flags & MSG_DONTWAIT, &err);
if (!skb) {
if (sent == 0)
sent = err;
break;
}
skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE);
err = memcpy_from_msg(skb_put(skb, size), msg, size);
if (err) {
kfree_skb(skb);
if (sent == 0)
sent = err;
break;
}
skb->priority = sk->sk_priority;
err = rfcomm_dlc_send(d, skb);
if (err < 0) {
kfree_skb(skb);
if (sent == 0)
sent = err;
break;
}
sent += size;
len -= size;
}
done:
release_sock(sk);
if (sent)
return sent;
skb = bt_skb_sendmmsg(sk, msg, len, d->mtu, RFCOMM_SKB_HEAD_RESERVE,
RFCOMM_SKB_TAIL_RESERVE);
if (IS_ERR(skb))
return PTR_ERR(skb);
sent = rfcomm_dlc_send(d, skb);
if (sent < 0)
kfree_skb(skb);
return sent;
}

30
net/bluetooth/sco.c
View File

@@ -279,12 +279,10 @@ static int sco_connect(struct hci_dev *hdev, struct sock *sk)
return err;
}
static int sco_send_frame(struct sock *sk, void *buf, int len,
unsigned int msg_flags)
static int sco_send_frame(struct sock *sk, struct sk_buff *skb)
{
struct sco_conn *conn = sco_pi(sk)->conn;
struct sk_buff *skb;
int err;
int len = skb->len;
/* Check outgoing MTU */
if (len > conn->mtu)
@@ -292,11 +290,6 @@ static int sco_send_frame(struct sock *sk, void *buf, int len,
BT_DBG("sk %p len %d", sk, len);
skb = bt_skb_send_alloc(sk, len, msg_flags & MSG_DONTWAIT, &err);
if (!skb)
return err;
memcpy(skb_put(skb, len), buf, len);
hci_send_sco(conn->hcon, skb);
return len;
@@ -715,7 +708,7 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
size_t len)
{
struct sock *sk = sock->sk;
void *buf;
struct sk_buff *skb;
int err;
BT_DBG("sock %p, sk %p", sock, sk);
@@ -727,24 +720,21 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
if (msg->msg_flags & MSG_OOB)
return -EOPNOTSUPP;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (memcpy_from_msg(buf, msg, len)) {
kfree(buf);
return -EFAULT;
}
skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
if (IS_ERR(skb))
return PTR_ERR(skb);
lock_sock(sk);
if (sk->sk_state == BT_CONNECTED)
err = sco_send_frame(sk, buf, len, msg->msg_flags);
err = sco_send_frame(sk, skb);
else
err = -ENOTCONN;
release_sock(sk);
kfree(buf);
if (err < 0)
kfree_skb(skb);
return err;
}

4
net/core/filter.c
View File

@@ -5839,7 +5839,7 @@ BPF_CALL_5(bpf_tcp_check_syncookie, struct sock *, sk, void *, iph, u32, iph_len
if (sk->sk_protocol != IPPROTO_TCP || sk->sk_state != TCP_LISTEN)
return -EINVAL;
if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies))
return -EINVAL;
if (!th->ack || th->rst || th->syn)
@@ -5914,7 +5914,7 @@ BPF_CALL_5(bpf_tcp_gen_syncookie, struct sock *, sk, void *, iph, u32, iph_len,
if (sk->sk_protocol != IPPROTO_TCP || sk->sk_state != TCP_LISTEN)
return -EINVAL;
if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies))
return -ENOENT;
if (!th->syn || th->ack || th->fin || th->rst)

4
net/core/secure_seq.c
View File

@@ -65,7 +65,7 @@ u32 secure_tcpv6_ts_off(const struct net *net,
.daddr = *(struct in6_addr *)daddr,
};
if (net->ipv4.sysctl_tcp_timestamps != 1)
if (READ_ONCE(net->ipv4.sysctl_tcp_timestamps) != 1)
return 0;
ts_secret_init();
@@ -121,7 +121,7 @@ EXPORT_SYMBOL(secure_ipv6_port_ephemeral);
#ifdef CONFIG_INET
u32 secure_tcp_ts_off(const struct net *net, __be32 saddr, __be32 daddr)
{
if (net->ipv4.sysctl_tcp_timestamps != 1)
if (READ_ONCE(net->ipv4.sysctl_tcp_timestamps) != 1)
return 0;
ts_secret_init();

4
net/ipv4/af_inet.c
View File

@@ -219,7 +219,7 @@ int inet_listen(struct socket *sock, int backlog)
* because the socket was in TCP_LISTEN state previously but
* was shutdown() rather than close().
*/
tcp_fastopen = sock_net(sk)->ipv4.sysctl_tcp_fastopen;
tcp_fastopen = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fastopen);
if ((tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) &&
(tcp_fastopen & TFO_SERVER_ENABLE) &&
!inet_csk(sk)->icsk_accept_queue.fastopenq.max_qlen) {
@@ -337,7 +337,7 @@ lookup_protocol:
inet->hdrincl = 1;
}
if (net->ipv4.sysctl_ip_no_pmtu_disc)
if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;

2
net/ipv4/fib_semantics.c
View File

@@ -2209,7 +2209,7 @@ void fib_select_multipath(struct fib_result *res, int hash)
}
change_nexthops(fi) {
if (net->ipv4.sysctl_fib_multipath_use_neigh) {
if (READ_ONCE(net->ipv4.sysctl_fib_multipath_use_neigh)) {
if (!fib_good_nh(nexthop_nh))
continue;
if (!first) {

2
net/ipv4/icmp.c
View File

@@ -886,7 +886,7 @@ static bool icmp_unreach(struct sk_buff *skb)
* values please see
* Documentation/networking/ip-sysctl.txt
*/
switch (net->ipv4.sysctl_ip_no_pmtu_disc) {
switch (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc)) {
default:
net_dbg_ratelimited("%pI4: fragmentation needed and DF set\n",
&iph->daddr);

23
net/ipv4/igmp.c
View File

@@ -469,7 +469,8 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
if (pmc->multiaddr == IGMP_ALL_HOSTS)
return skb;
if (ipv4_is_local_multicast(pmc->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
if (ipv4_is_local_multicast(pmc->multiaddr) &&
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
return skb;
mtu = READ_ONCE(dev->mtu);
@@ -595,7 +596,7 @@ static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
if (pmc->multiaddr == IGMP_ALL_HOSTS)
continue;
if (ipv4_is_local_multicast(pmc->multiaddr) &&
!net->ipv4.sysctl_igmp_llm_reports)
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
continue;
spin_lock_bh(&pmc->lock);
if (pmc->sfcount[MCAST_EXCLUDE])
@@ -738,7 +739,8 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
if (type == IGMPV3_HOST_MEMBERSHIP_REPORT)
return igmpv3_send_report(in_dev, pmc);
if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
if (ipv4_is_local_multicast(group) &&
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
return 0;
if (type == IGMP_HOST_LEAVE_MESSAGE)
@@ -915,7 +917,8 @@ static bool igmp_heard_report(struct in_device *in_dev, __be32 group)
if (group == IGMP_ALL_HOSTS)
return false;
if (ipv4_is_local_multicast(group) && !net->ipv4.sysctl_igmp_llm_reports)
if (ipv4_is_local_multicast(group) &&
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
return false;
rcu_read_lock();
@@ -1040,7 +1043,7 @@ static bool igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
if (im->multiaddr == IGMP_ALL_HOSTS)
continue;
if (ipv4_is_local_multicast(im->multiaddr) &&
!net->ipv4.sysctl_igmp_llm_reports)
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
continue;
spin_lock_bh(&im->lock);
if (im->tm_running)
@@ -1291,7 +1294,8 @@ static void __igmp_group_dropped(struct ip_mc_list *im, gfp_t gfp)
#ifdef CONFIG_IP_MULTICAST
if (im->multiaddr == IGMP_ALL_HOSTS)
return;
if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
if (ipv4_is_local_multicast(im->multiaddr) &&
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
return;
reporter = im->reporter;
@@ -1333,7 +1337,8 @@ static void igmp_group_added(struct ip_mc_list *im)
#ifdef CONFIG_IP_MULTICAST
if (im->multiaddr == IGMP_ALL_HOSTS)
return;
if (ipv4_is_local_multicast(im->multiaddr) && !net->ipv4.sysctl_igmp_llm_reports)
if (ipv4_is_local_multicast(im->multiaddr) &&
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
return;
if (in_dev->dead)
@@ -1637,7 +1642,7 @@ static void ip_mc_rejoin_groups(struct in_device *in_dev)
if (im->multiaddr == IGMP_ALL_HOSTS)
continue;
if (ipv4_is_local_multicast(im->multiaddr) &&
!net->ipv4.sysctl_igmp_llm_reports)
!READ_ONCE(net->ipv4.sysctl_igmp_llm_reports))
continue;
/* a failover is happening and switches
@@ -2187,7 +2192,7 @@ static int __ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr,
count++;
}
err = -ENOBUFS;
if (count >= net->ipv4.sysctl_igmp_max_memberships)
if (count >= READ_ONCE(net->ipv4.sysctl_igmp_max_memberships))
goto done;
iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
if (!iml)

2
net/ipv4/route.c
View File

@@ -1423,7 +1423,7 @@ u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr)
struct fib_info *fi = res->fi;
u32 mtu = 0;
if (dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu ||
if (READ_ONCE(dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu) ||
fi->fib_metrics->metrics[RTAX_LOCK - 1] & (1 << RTAX_MTU))
mtu = fi->fib_mtu;

9
net/ipv4/syncookies.c
View File

@@ -243,12 +243,12 @@ bool cookie_timestamp_decode(const struct net *net,
return true;
}
if (!net->ipv4.sysctl_tcp_timestamps)
if (!READ_ONCE(net->ipv4.sysctl_tcp_timestamps))
return false;
tcp_opt->sack_ok = (options & TS_OPT_SACK) ? TCP_SACK_SEEN : 0;
if (tcp_opt->sack_ok && !net->ipv4.sysctl_tcp_sack)
if (tcp_opt->sack_ok && !READ_ONCE(net->ipv4.sysctl_tcp_sack))
return false;
if ((options & TS_OPT_WSCALE_MASK) == TS_OPT_WSCALE_MASK)
@@ -257,7 +257,7 @@ bool cookie_timestamp_decode(const struct net *net,
tcp_opt->wscale_ok = 1;
tcp_opt->snd_wscale = options & TS_OPT_WSCALE_MASK;
return net->ipv4.sysctl_tcp_window_scaling != 0;
return READ_ONCE(net->ipv4.sysctl_tcp_window_scaling) != 0;
}
EXPORT_SYMBOL(cookie_timestamp_decode);
@@ -297,7 +297,8 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb)
struct flowi4 fl4;
u32 tsoff = 0;
if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies || !th->ack || th->rst)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) ||
!th->ack || th->rst)
goto out;
if (tcp_synq_no_recent_overflow(sk))

10
net/ipv4/tcp.c
View File

@@ -437,7 +437,7 @@ void tcp_init_sock(struct sock *sk)
tp->snd_cwnd_clamp = ~0;
tp->mss_cache = TCP_MSS_DEFAULT;
tp->reordering = sock_net(sk)->ipv4.sysctl_tcp_reordering;
tp->reordering = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_reordering);
tcp_assign_congestion_control(sk);
tp->tsoffset = 0;
@@ -1148,7 +1148,8 @@ static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg,
struct sockaddr *uaddr = msg->msg_name;
int err, flags;
if (!(sock_net(sk)->ipv4.sysctl_tcp_fastopen & TFO_CLIENT_ENABLE) ||
if (!(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fastopen) &
TFO_CLIENT_ENABLE) ||
(uaddr && msg->msg_namelen >= sizeof(uaddr->sa_family) &&
uaddr->sa_family == AF_UNSPEC))
return -EOPNOTSUPP;
@@ -3127,7 +3128,8 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
case TCP_FASTOPEN_CONNECT:
if (val > 1 || val < 0) {
err = -EINVAL;
} else if (net->ipv4.sysctl_tcp_fastopen & TFO_CLIENT_ENABLE) {
} else if (READ_ONCE(net->ipv4.sysctl_tcp_fastopen) &
TFO_CLIENT_ENABLE) {
if (sk->sk_state == TCP_CLOSE)
tp->fastopen_connect = val;
else
@@ -3466,7 +3468,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
case TCP_LINGER2:
val = tp->linger2;
if (val >= 0)
val = (val ? : net->ipv4.sysctl_tcp_fin_timeout) / HZ;
val = (val ? : READ_ONCE(net->ipv4.sysctl_tcp_fin_timeout)) / HZ;
break;
case TCP_DEFER_ACCEPT:
val = retrans_to_secs(icsk->icsk_accept_queue.rskq_defer_accept,

4
net/ipv4/tcp_fastopen.c
View File

@@ -349,7 +349,7 @@ static bool tcp_fastopen_no_cookie(const struct sock *sk,
const struct dst_entry *dst,
int flag)
{
return (sock_net(sk)->ipv4.sysctl_tcp_fastopen & flag) ||
return (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fastopen) & flag) ||
tcp_sk(sk)->fastopen_no_cookie ||
(dst && dst_metric(dst, RTAX_FASTOPEN_NO_COOKIE));
}
@@ -364,7 +364,7 @@ struct sock *tcp_try_fastopen(struct sock *sk, struct sk_buff *skb,
const struct dst_entry *dst)
{
bool syn_data = TCP_SKB_CB(skb)->end_seq != TCP_SKB_CB(skb)->seq + 1;
int tcp_fastopen = sock_net(sk)->ipv4.sysctl_tcp_fastopen;
int tcp_fastopen = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fastopen);
struct tcp_fastopen_cookie valid_foc = { .len = -1 };
struct sock *child;
int ret = 0;

51
net/ipv4/tcp_input.c
View File

@@ -906,7 +906,7 @@ static void tcp_check_sack_reordering(struct sock *sk, const u32 low_seq,
tp->undo_marker ? tp->undo_retrans : 0);
#endif
tp->reordering = min_t(u32, (metric + mss - 1) / mss,
sock_net(sk)->ipv4.sysctl_tcp_max_reordering);
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_max_reordering));
}
/* This exciting event is worth to be remembered. 8) */
@@ -1887,7 +1887,7 @@ static void tcp_check_reno_reordering(struct sock *sk, const int addend)
return;
tp->reordering = min_t(u32, tp->packets_out + addend,
sock_net(sk)->ipv4.sysctl_tcp_max_reordering);
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_max_reordering));
tp->reord_seen++;
NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPRENOREORDER);
}
@@ -1951,7 +1951,8 @@ static inline void tcp_init_undo(struct tcp_sock *tp)
static bool tcp_is_rack(const struct sock *sk)
{
return sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_LOSS_DETECTION;
return READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_recovery) &
TCP_RACK_LOSS_DETECTION;
}
/* If we detect SACK reneging, forget all SACK information
@@ -1995,6 +1996,7 @@ void tcp_enter_loss(struct sock *sk)
struct tcp_sock *tp = tcp_sk(sk);
struct net *net = sock_net(sk);
bool new_recovery = icsk->icsk_ca_state < TCP_CA_Recovery;
u8 reordering;
tcp_timeout_mark_lost(sk);
@@ -2015,10 +2017,12 @@ void tcp_enter_loss(struct sock *sk)
/* Timeout in disordered state after receiving substantial DUPACKs
* suggests that the degree of reordering is over-estimated.
*/
reordering = READ_ONCE(net->ipv4.sysctl_tcp_reordering);
if (icsk->icsk_ca_state <= TCP_CA_Disorder &&
tp->sacked_out >= net->ipv4.sysctl_tcp_reordering)
tp->sacked_out >= reordering)
tp->reordering = min_t(unsigned int, tp->reordering,
net->ipv4.sysctl_tcp_reordering);
reordering);
tcp_set_ca_state(sk, TCP_CA_Loss);
tp->high_seq = tp->snd_nxt;
tcp_ecn_queue_cwr(tp);
@@ -3320,7 +3324,8 @@ static inline bool tcp_may_raise_cwnd(const struct sock *sk, const int flag)
* new SACK or ECE mark may first advance cwnd here and later reduce
* cwnd in tcp_fastretrans_alert() based on more states.
*/
if (tcp_sk(sk)->reordering > sock_net(sk)->ipv4.sysctl_tcp_reordering)
if (tcp_sk(sk)->reordering >
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_reordering))
return flag & FLAG_FORWARD_PROGRESS;
return flag & FLAG_DATA_ACKED;
@@ -3903,7 +3908,7 @@ void tcp_parse_options(const struct net *net,
break;
case TCPOPT_WINDOW:
if (opsize == TCPOLEN_WINDOW && th->syn &&
!estab && net->ipv4.sysctl_tcp_window_scaling) {
!estab && READ_ONCE(net->ipv4.sysctl_tcp_window_scaling)) {
__u8 snd_wscale = *(__u8 *)ptr;
opt_rx->wscale_ok = 1;
if (snd_wscale > TCP_MAX_WSCALE) {
@@ -3919,7 +3924,7 @@ void tcp_parse_options(const struct net *net,
case TCPOPT_TIMESTAMP:
if ((opsize == TCPOLEN_TIMESTAMP) &&
((estab && opt_rx->tstamp_ok) ||
(!estab && net->ipv4.sysctl_tcp_timestamps))) {
(!estab && READ_ONCE(net->ipv4.sysctl_tcp_timestamps)))) {
opt_rx->saw_tstamp = 1;
opt_rx->rcv_tsval = get_unaligned_be32(ptr);
opt_rx->rcv_tsecr = get_unaligned_be32(ptr + 4);
@@ -3927,7 +3932,7 @@ void tcp_parse_options(const struct net *net,
break;
case TCPOPT_SACK_PERM:
if (opsize == TCPOLEN_SACK_PERM && th->syn &&
!estab && net->ipv4.sysctl_tcp_sack) {
!estab && READ_ONCE(net->ipv4.sysctl_tcp_sack)) {
opt_rx->sack_ok = TCP_SACK_SEEN;
tcp_sack_reset(opt_rx);
}
@@ -5353,7 +5358,7 @@ static void tcp_check_urg(struct sock *sk, const struct tcphdr *th)
struct tcp_sock *tp = tcp_sk(sk);
u32 ptr = ntohs(th->urg_ptr);
if (ptr && !sock_net(sk)->ipv4.sysctl_tcp_stdurg)
if (ptr && !READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_stdurg))
ptr--;
ptr += ntohl(th->seq);
@@ -6532,11 +6537,14 @@ static bool tcp_syn_flood_action(const struct sock *sk, const char *proto)
{
struct request_sock_queue *queue = &inet_csk(sk)->icsk_accept_queue;
const char *msg = "Dropping request";
bool want_cookie = false;
struct net *net = sock_net(sk);
bool want_cookie = false;
u8 syncookies;
syncookies = READ_ONCE(net->ipv4.sysctl_tcp_syncookies);
#ifdef CONFIG_SYN_COOKIES
if (net->ipv4.sysctl_tcp_syncookies) {
if (syncookies) {
msg = "Sending cookies";
want_cookie = true;
__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPREQQFULLDOCOOKIES);
@@ -6544,8 +6552,7 @@ static bool tcp_syn_flood_action(const struct sock *sk, const char *proto)
#endif
__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPREQQFULLDROP);
if (!queue->synflood_warned &&
net->ipv4.sysctl_tcp_syncookies != 2 &&
if (!queue->synflood_warned && syncookies != 2 &&
xchg(&queue->synflood_warned, 1) == 0)
net_info_ratelimited("%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n",
proto, sk->sk_num, msg);
@@ -6580,7 +6587,7 @@ u16 tcp_get_syncookie_mss(struct request_sock_ops *rsk_ops,
struct tcp_sock *tp = tcp_sk(sk);
u16 mss;
if (sock_net(sk)->ipv4.sysctl_tcp_syncookies != 2 &&
if (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) != 2 &&
!inet_csk_reqsk_queue_is_full(sk))
return 0;
@@ -6614,13 +6621,15 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
bool want_cookie = false;
struct dst_entry *dst;
struct flowi fl;
u8 syncookies;
syncookies = READ_ONCE(net->ipv4.sysctl_tcp_syncookies);
/* TW buckets are converted to open requests without
* limitations, they conserve resources and peer is
* evidently real one.
*/
if ((net->ipv4.sysctl_tcp_syncookies == 2 ||
inet_csk_reqsk_queue_is_full(sk)) && !isn) {
if ((syncookies == 2 || inet_csk_reqsk_queue_is_full(sk)) && !isn) {
want_cookie = tcp_syn_flood_action(sk, rsk_ops->slab_name);
if (!want_cookie)
goto drop;
@@ -6670,10 +6679,12 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
goto drop_and_free;
if (!want_cookie && !isn) {
int max_syn_backlog = READ_ONCE(net->ipv4.sysctl_max_syn_backlog);
/* Kill the following clause, if you dislike this way. */
if (!net->ipv4.sysctl_tcp_syncookies &&
(net->ipv4.sysctl_max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
(net->ipv4.sysctl_max_syn_backlog >> 2)) &&
if (!syncookies &&
(max_syn_backlog - inet_csk_reqsk_queue_len(sk) <
(max_syn_backlog >> 2)) &&
!tcp_peer_is_proven(req, dst)) {
/* Without syncookies last quarter of
* backlog is filled with destinations,

2
net/ipv4/tcp_ipv4.c
View File

@@ -105,10 +105,10 @@ static u32 tcp_v4_init_ts_off(const struct net *net, const struct sk_buff *skb)
int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
{
int reuse = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_tw_reuse);
const struct inet_timewait_sock *tw = inet_twsk(sktw);
const struct tcp_timewait_sock *tcptw = tcp_twsk(sktw);
struct tcp_sock *tp = tcp_sk(sk);
int reuse = sock_net(sk)->ipv4.sysctl_tcp_tw_reuse;
if (reuse == 2) {
/* Still does not detect *everything* that goes through

3
net/ipv4/tcp_metrics.c
View File

@@ -425,7 +425,8 @@ void tcp_update_metrics(struct sock *sk)
if (!tcp_metric_locked(tm, TCP_METRIC_REORDERING)) {
val = tcp_metric_get(tm, TCP_METRIC_REORDERING);
if (val < tp->reordering &&
tp->reordering != net->ipv4.sysctl_tcp_reordering)
tp->reordering !=
READ_ONCE(net->ipv4.sysctl_tcp_reordering))
tcp_metric_set(tm, TCP_METRIC_REORDERING,
tp->reordering);
}

2
net/ipv4/tcp_minisocks.c
View File

@@ -180,7 +180,7 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
* Oh well... nobody has a sufficient solution to this
* protocol bug yet.
*/
if (twsk_net(tw)->ipv4.sysctl_tcp_rfc1337 == 0) {
if (!READ_ONCE(twsk_net(tw)->ipv4.sysctl_tcp_rfc1337)) {
kill:
inet_twsk_deschedule_put(tw);
return TCP_TW_SUCCESS;

29
net/ipv4/tcp_output.c
View File

@@ -620,18 +620,18 @@ static unsigned int tcp_syn_options(struct sock *sk, struct sk_buff *skb,
opts->mss = tcp_advertise_mss(sk);
remaining -= TCPOLEN_MSS_ALIGNED;
if (likely(sock_net(sk)->ipv4.sysctl_tcp_timestamps && !*md5)) {
if (likely(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_timestamps) && !*md5)) {
opts->options |= OPTION_TS;
opts->tsval = tcp_skb_timestamp(skb) + tp->tsoffset;
opts->tsecr = tp->rx_opt.ts_recent;
remaining -= TCPOLEN_TSTAMP_ALIGNED;
}
if (likely(sock_net(sk)->ipv4.sysctl_tcp_window_scaling)) {
if (likely(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_window_scaling))) {
opts->ws = tp->rx_opt.rcv_wscale;
opts->options |= OPTION_WSCALE;
remaining -= TCPOLEN_WSCALE_ALIGNED;
}
if (likely(sock_net(sk)->ipv4.sysctl_tcp_sack)) {
if (likely(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_sack))) {
opts->options |= OPTION_SACK_ADVERTISE;
if (unlikely(!(OPTION_TS & opts->options)))
remaining -= TCPOLEN_SACKPERM_ALIGNED;
@@ -1494,7 +1494,8 @@ static inline int __tcp_mtu_to_mss(struct sock *sk, int pmtu)
mss_now -= icsk->icsk_ext_hdr_len;
/* Then reserve room for full set of TCP options and 8 bytes of data */
mss_now = max(mss_now, sock_net(sk)->ipv4.sysctl_tcp_min_snd_mss);
mss_now = max(mss_now,
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_min_snd_mss));
return mss_now;
}
@@ -1537,10 +1538,10 @@ void tcp_mtup_init(struct sock *sk)
struct inet_connection_sock *icsk = inet_csk(sk);
struct net *net = sock_net(sk);
icsk->icsk_mtup.enabled = net->ipv4.sysctl_tcp_mtu_probing > 1;
icsk->icsk_mtup.enabled = READ_ONCE(net->ipv4.sysctl_tcp_mtu_probing) > 1;
icsk->icsk_mtup.search_high = tp->rx_opt.mss_clamp + sizeof(struct tcphdr) +
icsk->icsk_af_ops->net_header_len;
icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, net->ipv4.sysctl_tcp_base_mss);
icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, READ_ONCE(net->ipv4.sysctl_tcp_base_mss));
icsk->icsk_mtup.probe_size = 0;
if (icsk->icsk_mtup.enabled)
icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;
@@ -1672,7 +1673,7 @@ static void tcp_cwnd_validate(struct sock *sk, bool is_cwnd_limited)
if (tp->packets_out > tp->snd_cwnd_used)
tp->snd_cwnd_used = tp->packets_out;
if (sock_net(sk)->ipv4.sysctl_tcp_slow_start_after_idle &&
if (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_slow_start_after_idle) &&
(s32)(tcp_jiffies32 - tp->snd_cwnd_stamp) >= inet_csk(sk)->icsk_rto &&
!ca_ops->cong_control)
tcp_cwnd_application_limited(sk);
@@ -2051,7 +2052,7 @@ static inline void tcp_mtu_check_reprobe(struct sock *sk)
u32 interval;
s32 delta;
interval = net->ipv4.sysctl_tcp_probe_interval;
interval = READ_ONCE(net->ipv4.sysctl_tcp_probe_interval);
delta = tcp_jiffies32 - icsk->icsk_mtup.probe_timestamp;
if (unlikely(delta >= interval * HZ)) {
int mss = tcp_current_mss(sk);
@@ -2133,7 +2134,7 @@ static int tcp_mtu_probe(struct sock *sk)
* probing process by not resetting search range to its orignal.
*/
if (probe_size > tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_high) ||
interval < net->ipv4.sysctl_tcp_probe_threshold) {
interval < READ_ONCE(net->ipv4.sysctl_tcp_probe_threshold)) {
/* Check whether enough time has elaplased for
* another round of probing.
*/
@@ -2508,7 +2509,7 @@ bool tcp_schedule_loss_probe(struct sock *sk, bool advancing_rto)
if (rcu_access_pointer(tp->fastopen_rsk))
return false;
early_retrans = sock_net(sk)->ipv4.sysctl_tcp_early_retrans;
early_retrans = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_early_retrans);
/* Schedule a loss probe in 2*RTT for SACK capable connections
* not in loss recovery, that are either limited by cwnd or application.
*/
@@ -2870,7 +2871,7 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *to,
struct sk_buff *skb = to, *tmp;
bool first = true;
if (!sock_net(sk)->ipv4.sysctl_tcp_retrans_collapse)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_retrans_collapse))
return;
if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_SYN)
return;
@@ -3406,7 +3407,7 @@ static void tcp_connect_init(struct sock *sk)
* See tcp_input.c:tcp_rcv_state_process case TCP_SYN_SENT.
*/
tp->tcp_header_len = sizeof(struct tcphdr);
if (sock_net(sk)->ipv4.sysctl_tcp_timestamps)
if (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_timestamps))
tp->tcp_header_len += TCPOLEN_TSTAMP_ALIGNED;
#ifdef CONFIG_TCP_MD5SIG
@@ -3442,7 +3443,7 @@ static void tcp_connect_init(struct sock *sk)
tp->advmss - (tp->rx_opt.ts_recent_stamp ? tp->tcp_header_len - sizeof(struct tcphdr) : 0),
&tp->rcv_wnd,
&tp->window_clamp,
sock_net(sk)->ipv4.sysctl_tcp_window_scaling,
READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_window_scaling),
&rcv_wscale,
rcv_wnd);
@@ -3846,7 +3847,7 @@ void tcp_send_probe0(struct sock *sk)
icsk->icsk_probes_out++;
if (err <= 0) {
if (icsk->icsk_backoff < net->ipv4.sysctl_tcp_retries2)
if (icsk->icsk_backoff < READ_ONCE(net->ipv4.sysctl_tcp_retries2))
icsk->icsk_backoff++;
timeout = tcp_probe0_when(sk, TCP_RTO_MAX);
} else {

6
net/ipv4/tcp_recovery.c
View File

@@ -33,7 +33,8 @@ static u32 tcp_rack_reo_wnd(const struct sock *sk)
return 0;
if (tp->sacked_out >= tp->reordering &&
!(sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_NO_DUPTHRESH))
!(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_recovery) &
TCP_RACK_NO_DUPTHRESH))
return 0;
}
@@ -204,7 +205,8 @@ void tcp_rack_update_reo_wnd(struct sock *sk, struct rate_sample *rs)
{
struct tcp_sock *tp = tcp_sk(sk);
if (sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_STATIC_REO_WND ||
if ((READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_recovery) &
TCP_RACK_STATIC_REO_WND) ||
!rs->prior_delivered)
return;

20
net/ipv4/tcp_timer.c
View File

@@ -143,7 +143,7 @@ static int tcp_out_of_resources(struct sock *sk, bool do_reset)
*/
static int tcp_orphan_retries(struct sock *sk, bool alive)
{
int retries = sock_net(sk)->ipv4.sysctl_tcp_orphan_retries; /* May be zero. */
int retries = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_orphan_retries); /* May be zero. */
/* We know from an ICMP that something is wrong. */
if (sk->sk_err_soft && !alive)
@@ -163,7 +163,7 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
int mss;
/* Black hole detection */
if (!net->ipv4.sysctl_tcp_mtu_probing)
if (!READ_ONCE(net->ipv4.sysctl_tcp_mtu_probing))
return;
if (!icsk->icsk_mtup.enabled) {
@@ -171,9 +171,9 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;
} else {
mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;
mss = min(net->ipv4.sysctl_tcp_base_mss, mss);
mss = max(mss, net->ipv4.sysctl_tcp_mtu_probe_floor);
mss = max(mss, net->ipv4.sysctl_tcp_min_snd_mss);
mss = min(READ_ONCE(net->ipv4.sysctl_tcp_base_mss), mss);
mss = max(mss, READ_ONCE(net->ipv4.sysctl_tcp_mtu_probe_floor));
mss = max(mss, READ_ONCE(net->ipv4.sysctl_tcp_min_snd_mss));
icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
}
tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
@@ -245,7 +245,7 @@ static int tcp_write_timeout(struct sock *sk)
retry_until = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_syn_retries;
expired = icsk->icsk_retransmits >= retry_until;
} else {
if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1, 0)) {
if (retransmits_timed_out(sk, READ_ONCE(net->ipv4.sysctl_tcp_retries1), 0)) {
/* Black hole detection */
tcp_mtu_probing(icsk, sk);
@@ -254,7 +254,7 @@ static int tcp_write_timeout(struct sock *sk)
sk_rethink_txhash(sk);
}
retry_until = net->ipv4.sysctl_tcp_retries2;
retry_until = READ_ONCE(net->ipv4.sysctl_tcp_retries2);
if (sock_flag(sk, SOCK_DEAD)) {
const bool alive = icsk->icsk_rto < TCP_RTO_MAX;
@@ -381,7 +381,7 @@ static void tcp_probe_timer(struct sock *sk)
msecs_to_jiffies(icsk->icsk_user_timeout))
goto abort;
max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2;
max_probes = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_retries2);
if (sock_flag(sk, SOCK_DEAD)) {
const bool alive = inet_csk_rto_backoff(icsk, TCP_RTO_MAX) < TCP_RTO_MAX;
@@ -569,7 +569,7 @@ out_reset_timer:
* linear-timeout retransmissions into a black hole
*/
if (sk->sk_state == TCP_ESTABLISHED &&
(tp->thin_lto || net->ipv4.sysctl_tcp_thin_linear_timeouts) &&
(tp->thin_lto || READ_ONCE(net->ipv4.sysctl_tcp_thin_linear_timeouts)) &&
tcp_stream_is_thin(tp) &&
icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {
icsk->icsk_backoff = 0;
@@ -580,7 +580,7 @@ out_reset_timer:
}
inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS,
tcp_clamp_rto_to_user_timeout(sk), TCP_RTO_MAX);
if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1 + 1, 0))
if (retransmits_timed_out(sk, READ_ONCE(net->ipv4.sysctl_tcp_retries1) + 1, 0))
__sk_dst_reset(sk);
out:;

2
net/ipv6/af_inet6.c
View File

@@ -222,7 +222,7 @@ lookup_protocol:
inet->mc_list = NULL;
inet->rcv_tos = 0;
if (net->ipv4.sysctl_ip_no_pmtu_disc)
if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;

3
net/ipv6/syncookies.c
View File

@@ -141,7 +141,8 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
__u8 rcv_wscale;
u32 tsoff = 0;
if (!sock_net(sk)->ipv4.sysctl_tcp_syncookies || !th->ack || th->rst)
if (!READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_syncookies) ||
!th->ack || th->rst)
goto out;
if (tcp_synq_no_recent_overflow(sk))

2
net/sctp/protocol.c
View File

@@ -358,7 +358,7 @@ static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
ret != RTN_LOCAL &&
!sp->inet.freebind &&
!net->ipv4.sysctl_ip_nonlocal_bind)
!READ_ONCE(net->ipv4.sysctl_ip_nonlocal_bind))
return 0;
if (ipv6_only_sock(sctp_opt2sk(sp)))

8
net/tls/tls_device.c
View File

@@ -94,13 +94,16 @@ static void tls_device_queue_ctx_destruction(struct tls_context *ctx)
unsigned long flags;
spin_lock_irqsave(&tls_device_lock, flags);
if (unlikely(!refcount_dec_and_test(&ctx->refcount)))
goto unlock;
list_move_tail(&ctx->list, &tls_device_gc_list);
/* schedule_work inside the spinlock
* to make sure tls_device_down waits for that work.
*/
schedule_work(&tls_device_gc_work);
unlock:
spin_unlock_irqrestore(&tls_device_lock, flags);
}
@@ -191,8 +194,7 @@ static void tls_device_sk_destruct(struct sock *sk)
clean_acked_data_disable(inet_csk(sk));
}
if (refcount_dec_and_test(&tls_ctx->refcount))
tls_device_queue_ctx_destruction(tls_ctx);
tls_device_queue_ctx_destruction(tls_ctx);
}
void tls_device_free_resources_tx(struct sock *sk)

5
net/xfrm/xfrm_policy.c
View File

@@ -2683,8 +2683,10 @@ static int xfrm_expand_policies(const struct flowi *fl, u16 family,
*num_xfrms = 0;
return 0;
}
if (IS_ERR(pols[0]))
if (IS_ERR(pols[0])) {
*num_pols = 0;
return PTR_ERR(pols[0]);
}
*num_xfrms = pols[0]->xfrm_nr;
@@ -2699,6 +2701,7 @@ static int xfrm_expand_policies(const struct flowi *fl, u16 family,
if (pols[1]) {
if (IS_ERR(pols[1])) {
xfrm_pols_put(pols, *num_pols);
*num_pols = 0;
return PTR_ERR(pols[1]);
}
(*num_pols)++;

2
net/xfrm/xfrm_state.c
View File

@@ -2565,7 +2565,7 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload)
int err;
if (family == AF_INET &&
xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc)
READ_ONCE(xs_net(x)->ipv4.sysctl_ip_no_pmtu_disc))
x->props.flags |= XFRM_STATE_NOPMTUDISC;
err = -EPROTONOSUPPORT;

12
security/integrity/ima/Kconfig
View File

@@ -69,10 +69,9 @@ choice
hash, defined as 20 bytes, and a null terminated pathname,
limited to 255 characters. The 'ima-ng' measurement list
template permits both larger hash digests and longer
pathnames.
pathnames. The configured default template can be replaced
by specifying "ima_template=" on the boot command line.
config IMA_TEMPLATE
bool "ima"
config IMA_NG_TEMPLATE
bool "ima-ng (default)"
config IMA_SIG_TEMPLATE
@@ -82,7 +81,6 @@ endchoice
config IMA_DEFAULT_TEMPLATE
string
depends on IMA
default "ima" if IMA_TEMPLATE
default "ima-ng" if IMA_NG_TEMPLATE
default "ima-sig" if IMA_SIG_TEMPLATE
@@ -102,15 +100,15 @@ choice
config IMA_DEFAULT_HASH_SHA256
bool "SHA256"
depends on CRYPTO_SHA256=y && !IMA_TEMPLATE
depends on CRYPTO_SHA256=y
config IMA_DEFAULT_HASH_SHA512
bool "SHA512"
depends on CRYPTO_SHA512=y && !IMA_TEMPLATE
depends on CRYPTO_SHA512=y
config IMA_DEFAULT_HASH_WP512
bool "WP512"
depends on CRYPTO_WP512=y && !IMA_TEMPLATE
depends on CRYPTO_WP512=y
endchoice
config IMA_DEFAULT_HASH

4
security/integrity/ima/ima_policy.c
View File

@@ -1542,6 +1542,10 @@ bool ima_appraise_signature(enum kernel_read_file_id id)
if (id >= READING_MAX_ID)
return false;
if (id == READING_KEXEC_IMAGE && !(ima_appraise & IMA_APPRAISE_ENFORCE)
&& security_locked_down(LOCKDOWN_KEXEC))
return false;
func = read_idmap[id] ?: FILE_CHECK;
rcu_read_lock();

1
sound/core/memalloc.c
View File

@@ -124,6 +124,7 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
if (WARN_ON(!device))
return -EINVAL;
size = PAGE_ALIGN(size);
dmab->dev.type = type;
dmab->dev.dev = device;
dmab->bytes = 0;