bka
141 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Michael Bestas
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4f0c737494 |
Merge tag 'ASB-2023-08-05_4.14-stable' of https://android.googlesource.com/kernel/common into android-msm-pixel-4.14
https://source.android.com/docs/security/bulletin/2023-08-01 CVE-2023-21264 CVE-2020-29374 * tag 'ASB-2023-08-05_4.14-stable' of https://android.googlesource.com/kernel/common: (1241 commits) UPSTREAM: xfrm: Check if_id in xfrm_migrate Linux 4.14.320 i2c: imx-lpi2c: fix type char overflow issue when calculating the clock cycle x86/apic: Fix kernel panic when booting with intremap=off and x2apic_phys drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl drm/exynos: fix race condition UAF in exynos_g2d_exec_ioctl drm/exynos: vidi: fix a wrong error return s390/cio: unregister device when the only path is gone usb: gadget: udc: fix NULL dereference in remove() fbdev: imsttfb: Release framebuffer and dealloc cmap on error path nfcsim.c: Fix error checking for debugfs_create_dir arm64: Add missing Set/Way CMO encodings HID: wacom: Add error check to wacom_parse_and_register() scsi: target: iscsi: Prevent login threads from racing between each other netfilter: nf_tables: disallow element updates of bound anonymous sets be2net: Extend xmit workaround to BE3 chip mmc: usdhi60rol0: fix deferred probing mmc: omap_hsmmc: fix deferred probing mmc: omap: fix deferred probing mmc: mtk-sd: fix deferred probing ... Conflicts: drivers/edac/edac_device.c drivers/mmc/core/block.c drivers/mtd/ubi/wl.c drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c drivers/usb/core/hub.c drivers/usb/core/quirks.c drivers/usb/dwc3/core.c drivers/usb/gadget/function/f_fs.c fs/ext4/page-io.c fs/incfs/main.c fs/incfs/vfs.c fs/verity/enable.c include/drm/drm_mipi_dsi.h include/net/pkt_sched.h include/uapi/linux/virtio_ids.h kernel/panic.c mm/kasan/report.c Change-Id: I8d87ff356c3d786b122e5addf42282830a6f3260 |
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Kees Cook
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4ba2f65e6f |
exit: Use READ_ONCE() for all oops/warn limit reads
commit 7535b832c6399b5ebfc5b53af5c51dd915ee2538 upstream. Use a temporary variable to take full advantage of READ_ONCE() behavior. Without this, the report (and even the test) might be out of sync with the initial test. Reported-by: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/lkml/Y5x7GXeluFmZ8E0E@hirez.programming.kicks-ass.net Fixes: 9fc9e278a5c0 ("panic: Introduce warn_limit") Fixes: d4ccd54d28d3 ("exit: Put an upper limit on how often we can oops") Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Jann Horn <jannh@google.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Petr Mladek <pmladek@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Marco Elver <elver@google.com> Cc: tangmeng <tangmeng@uniontech.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Kees Cook
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11bece1415 |
panic: Expose "warn_count" to sysfs
commit 8b05aa26336113c4cea25f1c333ee8cd4fc212a6 upstream. Since Warn count is now tracked and is a fairly interesting signal, add the entry /sys/kernel/warn_count to expose it to userspace. Cc: Petr Mladek <pmladek@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: tangmeng <tangmeng@uniontech.com> Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221117234328.594699-6-keescook@chromium.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Kees Cook
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f86706f458 |
panic: Introduce warn_limit
commit 9fc9e278a5c0b708eeffaf47d6eb0c82aa74ed78 upstream. Like oops_limit, add warn_limit for limiting the number of warnings when panic_on_warn is not set. Cc: Jonathan Corbet <corbet@lwn.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: "Jason A. Donenfeld" <Jason@zx2c4.com> Cc: Eric Biggers <ebiggers@google.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Petr Mladek <pmladek@suse.com> Cc: tangmeng <tangmeng@uniontech.com> Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: linux-doc@vger.kernel.org Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20221117234328.594699-5-keescook@chromium.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Kees Cook
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a83bcc5fc4 |
panic: Consolidate open-coded panic_on_warn checks
commit 79cc1ba7badf9e7a12af99695a557e9ce27ee967 upstream. Several run-time checkers (KASAN, UBSAN, KFENCE, KCSAN, sched) roll their own warnings, and each check "panic_on_warn". Consolidate this into a single function so that future instrumentation can be added in a single location. Cc: Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ben Segall <bsegall@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Gow <davidgow@google.com> Cc: tangmeng <tangmeng@uniontech.com> Cc: Jann Horn <jannh@google.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Petr Mladek <pmladek@suse.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: "Guilherme G. Piccoli" <gpiccoli@igalia.com> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Link: https://lore.kernel.org/r/20221117234328.594699-4-keescook@chromium.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Tiezhu Yang
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3bd9e479d3 |
panic: unset panic_on_warn inside panic()
commit 1a2383e8b84c0451fd9b1eec3b9aab16f30b597c upstream. In the current code, the following three places need to unset panic_on_warn before calling panic() to avoid recursive panics: kernel/kcsan/report.c: print_report() kernel/sched/core.c: __schedule_bug() mm/kfence/report.c: kfence_report_error() In order to avoid copy-pasting "panic_on_warn = 0" all over the places, it is better to move it inside panic() and then remove it from the other places. Link: https://lkml.kernel.org/r/1644324666-15947-4-git-send-email-yangtiezhu@loongson.cn Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Reviewed-by: Marco Elver <elver@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Baoquan He <bhe@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Xuefeng Li <lixuefeng@loongson.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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lucaswei
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96d909a710 |
Merge android-4.14-q (4.14.212) into android-msm-pixel-4.14-lts
Merge 4.14.212 into android-4.14-q
Linux 4.14.212
x86/uprobes: Do not use prefixes.nbytes when looping over prefixes.bytes
Input: i8042 - fix error return code in i8042_setup_aux()
i2c: qup: Fix error return code in qup_i2c_bam_schedule_desc()
gfs2: check for empty rgrp tree in gfs2_ri_update
* tracing: Fix userstacktrace option for instances
kernel/trace/trace.c
kernel/trace/trace.h
spi: bcm2835: Release the DMA channel if probe fails after dma_init
spi: bcm2835: Fix use-after-free on unbind
spi: bcm-qspi: Fix use-after-free on unbind
* spi: Introduce device-managed SPI controller allocation
drivers/spi/spi.c
include/linux/spi/spi.h
iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs
speakup: Reject setting the speakup line discipline outside of speakup
i2c: imx: Check for I2SR_IAL after every byte
i2c: imx: Fix reset of I2SR_IAL flag
* mm/swapfile: do not sleep with a spin lock held
mm/swapfile.c
cifs: fix potential use-after-free in cifs_echo_request()
ftrace: Fix updating FTRACE_FL_TRAMP
ALSA: hda/generic: Add option to enforce preferred_dacs pairs
ALSA: hda/realtek - Add new codec supported for ALC897
* tty: Fix ->session locking
drivers/tty/tty_io.c
drivers/tty/tty_jobctrl.c
include/linux/tty.h
* tty: Fix ->pgrp locking in tiocspgrp()
drivers/tty/tty_jobctrl.c
USB: serial: option: fix Quectel BG96 matching
USB: serial: option: add support for Thales Cinterion EXS82
USB: serial: option: add Fibocom NL668 variants
USB: serial: ch341: sort device-id entries
USB: serial: ch341: add new Product ID for CH341A
USB: serial: kl5kusb105: fix memleak on open
* usb: gadget: f_fs: Use local copy of descriptors for userspace copy
drivers/usb/gadget/function/f_fs.c
* vlan: consolidate VLAN parsing code and limit max parsing depth
include/linux/if_vlan.h
include/net/inet_ecn.h
pinctrl: baytrail: Fix pin being driven low for a while on gpiod_get(..., GPIOD_OUT_HIGH)
pinctrl: baytrail: Replace WARN with dev_info_once when setting direct-irq pin to output
Merge 4.14.211 into android-4.14-q
Linux 4.14.211
RDMA/i40iw: Address an mmap handler exploit in i40iw
Input: i8042 - add ByteSpeed touchpad to noloop table
* Input: xpad - support Ardwiino Controllers
drivers/input/joystick/xpad.c
* ALSA: usb-audio: US16x08: fix value count for level meters
sound/usb/mixer_us16x08.c
dt-bindings: net: correct interrupt flags in examples
net/mlx5: Fix wrong address reclaim when command interface is down
net: pasemi: fix error return code in pasemi_mac_open()
cxgb3: fix error return code in t3_sge_alloc_qset()
net/x25: prevent a couple of overflows
ibmvnic: Fix TX completion error handling
ibmvnic: Ensure that SCRQ entry reads are correctly ordered
* ipv4: Fix tos mask in inet_rtm_getroute()
net/ipv4/route.c
* netfilter: bridge: reset skb->pkt_type after NF_INET_POST_ROUTING traversal
net/bridge/br_netfilter_hooks.c
* bonding: wait for sysfs kobject destruction before freeing struct slave
drivers/net/bonding/bond_main.c
drivers/net/bonding/bond_sysfs_slave.c
include/net/bonding.h
usbnet: ipheth: fix connectivity with iOS 14
* tun: honor IOCB_NOWAIT flag
drivers/net/tun.c
* tcp: Set INET_ECN_xmit configuration in tcp_reinit_congestion_control
net/ipv4/tcp_cong.c
* sock: set sk_err to ee_errno on dequeue from errq
net/core/skbuff.c
rose: Fix Null pointer dereference in rose_send_frame()
net/af_iucv: set correct sk_protocol for child sockets
* UPSTREAM: arm64: sysreg: Clean up instructions for modifying PSTATE fields
arch/arm64/include/asm/sysreg.h
arch/arm64/kernel/cpufeature.c
ANDROID: cuttlefish_defconfig: Disable CONFIG_KSM
Merge 4.14.210 into android-4.14-q
Linux 4.14.210
* USB: core: Fix regression in Hercules audio card
drivers/usb/core/quirks.c
* USB: core: add endpoint-blacklist quirk
drivers/usb/core/config.c
drivers/usb/core/quirks.c
drivers/usb/core/usb.h
include/linux/usb/quirks.h
x86/resctrl: Add necessary kernfs_put() calls to prevent refcount leak
x86/resctrl: Remove superfluous kernfs_get() calls to prevent refcount leak
x86/speculation: Fix prctl() when spectre_v2_user={seccomp,prctl},ibpb
usb: gadget: Fix memleak in gadgetfs_fill_super
* usb: gadget: f_midi: Fix memleak in f_midi_alloc
drivers/usb/gadget/function/f_midi.c
* USB: core: Change %pK for __user pointers to %px
drivers/usb/core/devio.c
perf probe: Fix to die_entrypc() returns error correctly
can: m_can: fix nominal bitiming tseg2 min for version >= 3.1
platform/x86: toshiba_acpi: Fix the wrong variable assignment
can: gs_usb: fix endianess problem with candleLight firmware
efivarfs: revert "fix memory leak in efivarfs_create()"
ibmvnic: fix NULL pointer dereference in ibmvic_reset_crq
ibmvnic: fix NULL pointer dereference in reset_sub_crq_queues
net: ena: set initial DMA width to avoid intel iommu issue
nfc: s3fwrn5: use signed integer for parsing GPIO numbers
IB/mthca: fix return value of error branch in mthca_init_cq()
bnxt_en: Release PCI regions when DMA mask setup fails during probe.
video: hyperv_fb: Fix the cache type when mapping the VRAM
bnxt_en: fix error return code in bnxt_init_board()
bnxt_en: fix error return code in bnxt_init_one()
* scsi: ufs: Fix race between shutdown and runtime resume flow
drivers/scsi/ufs/ufshcd.c
batman-adv: set .owner to THIS_MODULE
phy: tegra: xusb: Fix dangling pointer on probe failure
perf/x86: fix sysfs type mismatches
scsi: target: iscsi: Fix cmd abort fabric stop race
scsi: libiscsi: Fix NOP race condition
dmaengine: pl330: _prep_dma_memcpy: Fix wrong burst size
nvme: free sq/cq dbbuf pointers when dbbuf set fails
* proc: don't allow async path resolution of /proc/self components
fs/proc/self.c
* HID: Add Logitech Dinovo Edge battery quirk
drivers/hid/hid-ids.h
drivers/hid/hid-input.c
x86/xen: don't unbind uninitialized lock_kicker_irq
dmaengine: xilinx_dma: use readl_poll_timeout_atomic variant
HID: hid-sensor-hub: Fix issue with devices with no report ID
Input: i8042 - allow insmod to succeed on devices without an i8042 controller
* HID: cypress: Support Varmilo Keyboards' media hotkeys
drivers/hid/hid-ids.h
ALSA: hda/hdmi: fix incorrect locking in hdmi_pcm_close
ALSA: hda/hdmi: Use single mutex unlock in error paths
* arm64: pgtable: Ensure dirty bit is preserved across pte_wrprotect()
arch/arm64/include/asm/pgtable.h
* arm64: pgtable: Fix pte_accessible()
arch/arm64/include/asm/pgtable.h
btrfs: inode: Verify inode mode to avoid NULL pointer dereference
btrfs: adjust return values of btrfs_inode_by_name
btrfs: tree-checker: Enhance chunk checker to validate chunk profile
* PCI: Add device even if driver attach failed
drivers/pci/bus.c
* wireless: Use linux/stddef.h instead of stddef.h
include/uapi/linux/wireless.h
btrfs: fix lockdep splat when reading qgroup config on mount
mm/userfaultfd: do not access vma->vm_mm after calling handle_userfault()
perf event: Check ref_reloc_sym before using it
Merge 4.14.209 into android-4.14-q
Linux 4.14.209
x86/microcode/intel: Check patch signature before saving microcode for early loading
s390/dasd: fix null pointer dereference for ERP requests
s390/cpum_sf.c: fix file permission for cpum_sfb_size
mac80211: free sta in sta_info_insert_finish() on errors
mac80211: minstrel: fix tx status processing corner case
mac80211: minstrel: remove deferred sampling code
xtensa: disable preemption around cache alias management calls
* regulator: workaround self-referent regulators
drivers/regulator/core.c
* regulator: avoid resolve_supply() infinite recursion
drivers/regulator/core.c
* regulator: fix memory leak with repeated set_machine_constraints()
drivers/regulator/core.c
iio: accel: kxcjk1013: Add support for KIOX010A ACPI DSM for setting tablet-mode
iio: accel: kxcjk1013: Replace is_smo8500_device with an acpi_type enum
* ext4: fix bogus warning in ext4_update_dx_flag()
fs/ext4/ext4.h
staging: rtl8723bs: Add 024c:0627 to the list of SDIO device-ids
efivarfs: fix memory leak in efivarfs_create()
tty: serial: imx: keep console clocks always on
ALSA: mixart: Fix mutex deadlock
* ALSA: ctl: fix error path at adding user-defined element set
sound/core/control.c
speakup: Do not let the line discipline be used several times
powerpc/uaccess-flush: fix missing includes in kup-radix.h
* libfs: fix error cast of negative value in simple_attr_write()
fs/libfs.c
xfs: revert "xfs: fix rmap key and record comparison functions"
regulator: ti-abb: Fix array out of bound read access on the first transition
MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu
ASoC: qcom: lpass-platform: Fix memory leak
can: m_can: m_can_handle_state_change(): fix state change
can: peak_usb: fix potential integer overflow on shift of a int
can: mcba_usb: mcba_usb_start_xmit(): first fill skb, then pass to can_put_echo_skb()
can: ti_hecc: Fix memleak in ti_hecc_probe
can: dev: can_restart(): post buffer from the right context
can: af_can: prevent potential access of uninitialized member in canfd_rcv()
can: af_can: prevent potential access of uninitialized member in can_rcv()
perf lock: Don't free "lock_seq_stat" if read_count isn't zero
ARM: dts: imx50-evk: Fix the chip select 1 IOMUX
arm: dts: imx6qdl-udoo: fix rgmii phy-mode for ksz9031 phy
MIPS: export has_transparent_hugepage() for modules
Input: adxl34x - clean up a data type in adxl34x_probe()
* vfs: remove lockdep bogosity in __sb_start_write
fs/super.c
* arm64: psci: Avoid printing in cpu_psci_cpu_die()
arch/arm64/kernel/psci.c
pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq
net: ftgmac100: Fix crash when removing driver
tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate
net: usb: qmi_wwan: Set DTR quirk for MR400
net/mlx5: Disable QoS when min_rates on all VFs are zero
* sctp: change to hold/put transport for proto_unreach_timer
net/sctp/input.c
net/sctp/sm_sideeffect.c
net/sctp/transport.c
qlcnic: fix error return code in qlcnic_83xx_restart_hw()
net: x25: Increase refcnt of "struct x25_neigh" in x25_rx_call_request
net/mlx4_core: Fix init_hca fields offset
* netlabel: fix an uninitialized warning in netlbl_unlabel_staticlist()
net/netlabel/netlabel_unlabeled.c
* netlabel: fix our progress tracking in netlbl_unlabel_staticlist()
net/netlabel/netlabel_unlabeled.c
net: Have netpoll bring-up DSA management interface
net: dsa: mv88e6xxx: Avoid VTU corruption on 6097
* net: bridge: add missing counters to ndo_get_stats64 callback
net/bridge/br_device.c
net: b44: fix error return code in b44_init_one()
mlxsw: core: Use variable timeout for EMAD retries
* inet_diag: Fix error path to cancel the meseage in inet_req_diag_fill()
net/ipv4/inet_diag.c
devlink: Add missing genlmsg_cancel() in devlink_nl_sb_port_pool_fill()
bnxt_en: read EEPROM A2h address using page 0
atm: nicstar: Unmap DMA on send error
* ah6: fix error return code in ah6_input()
net/ipv6/ah6.c
Merge 4.14.208 into android-4.14-q
Linux 4.14.208
ACPI: GED: fix -Wformat
KVM: x86: clflushopt should be treated as a no-op by emulation
can: proc: can_remove_proc(): silence remove_proc_entry warning
mac80211: always wind down STA state
Input: sunkbd - avoid use-after-free in teardown paths
powerpc/8xx: Always fault when _PAGE_ACCESSED is not set
gpio: mockup: fix resource leak in error path
i2c: imx: Fix external abort on interrupt in exit paths
i2c: imx: use clk notifier for rate changes
powerpc/64s: flush L1D after user accesses
powerpc/uaccess: Evaluate macro arguments once, before user access is allowed
powerpc: Fix __clear_user() with KUAP enabled
powerpc: Implement user_access_begin and friends
powerpc: Add a framework for user access tracking
powerpc/64s: flush L1D on kernel entry
powerpc/64s: move some exception handlers out of line
powerpc/64s: Define MASKABLE_RELON_EXCEPTION_PSERIES_OOL
* ANDROID: uid_sys_stats: report uid_cputime stats in microseconds
drivers/misc/uid_sys_stats.c
Merge 4.14.207 into android-4.14-q
Linux 4.14.207
* mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
arch/Kconfig
fs/exec.c
Convert trailing spaces and periods in path components
* reboot: fix overflow parsing reboot cpu number
kernel/reboot.c
* Revert "kernel/reboot.c: convert simple_strtoul to kstrtoint"
kernel/reboot.c
* perf/core: Fix race in the perf_mmap_close() function
kernel/events/core.c
xen/events: block rogue events for some time
xen/events: defer eoi in case of excessive number of events
xen/events: use a common cpu hotplug hook for event channels
xen/events: switch user event channels to lateeoi model
xen/pciback: use lateeoi irq binding
xen/pvcallsback: use lateeoi irq binding
xen/scsiback: use lateeoi irq binding
xen/netback: use lateeoi irq binding
xen/blkback: use lateeoi irq binding
xen/events: add a new "late EOI" evtchn framework
xen/events: fix race in evtchn_fifo_unmask()
xen/events: add a proper barrier to 2-level uevent unmasking
xen/events: avoid removing an event channel while handling it
* perf/core: Fix a memory leak in perf_event_parse_addr_filter()
kernel/events/core.c
* perf/core: Fix crash when using HW tracing kernel filters
kernel/events/core.c
* perf/core: Fix bad use of igrab()
include/linux/perf_event.h
kernel/events/core.c
x86/speculation: Allow IBPB to be conditionally enabled on CPUs with always-on STIBP
* random32: make prandom_u32() output unpredictable
drivers/char/random.c
include/linux/prandom.h
kernel/time/timer.c
lib/random32.c
* net: Update window_clamp if SOCK_RCVBUF is set
net/ipv4/syncookies.c
net/ipv6/syncookies.c
r8169: fix potential skb double free in an error path
vrf: Fix fast path output packet handling with async Netfilter rules
net/x25: Fix null-ptr-deref in x25_connect
net/af_iucv: fix null pointer dereference on shutdown
* IPv6: Set SIT tunnel hard_header_len to zero
net/ipv6/sit.c
* swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
lib/swiotlb.c
pinctrl: amd: fix incorrect way to disable debounce filter
pinctrl: amd: use higher precision for 512 RtcClk
drm/gma500: Fix out-of-bounds access to struct drm_device.vblank[]
* don't dump the threads that had been already exiting when zapped.
kernel/exit.c
selinux: Fix error return code in sel_ib_pkey_sid_slow()
ocfs2: initialize ip_next_orphan
* futex: Don't enable IRQs unconditionally in put_pi_state()
kernel/futex.c
mei: protect mei_cl_mtu from null dereference
usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode
* uio: Fix use-after-free in uio_unregister_device()
drivers/uio/uio.c
thunderbolt: Add the missed ida_simple_remove() in ring_request_msix()
* ext4: unlock xattr_sem properly in ext4_inline_data_truncate()
fs/ext4/inline.c
* ext4: correctly report "not supported" for {usr,grp}jquota when !CONFIG_QUOTA
fs/ext4/super.c
* perf: Fix get_recursion_context()
kernel/events/internal.h
cosa: Add missing kfree in error path of cosa_write
* of/address: Fix of_node memory leak in of_dma_is_coherent
drivers/of/address.c
xfs: fix a missing unlock on error in xfs_fs_map_blocks
xfs: fix rmap key and record comparison functions
xfs: fix flags argument to rmap lookup when converting shared file rmaps
nbd: fix a block_device refcount leak in nbd_release
pinctrl: aspeed: Fix GPI only function problem.
ARM: 9019/1: kprobes: Avoid fortify_panic() when copying optprobe template
pinctrl: intel: Set default bias in case no particular value given
iommu/amd: Increase interrupt remapping table limit to 512 entries
scsi: scsi_dh_alua: Avoid crash during alua_bus_detach()
* cfg80211: regulatory: Fix inconsistent format argument
net/wireless/reg.c
mac80211: fix use of skb payload instead of header
drm/amdgpu: perform srbm soft reset always on SDMA resume
scsi: hpsa: Fix memory leak in hpsa_init_one()
gfs2: check for live vs. read-only file system in gfs2_fitrim
gfs2: Add missing truncate_inode_pages_final for sd_aspace
gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
usb: gadget: goku_udc: fix potential crashes in probe
ath9k_htc: Use appropriate rs_datalen type
Btrfs: fix missing error return if writeback for extent buffer never started
xfs: flush new eof page on truncate to avoid post-eof corruption
can: peak_canfd: pucan_handle_can_rx(): fix echo management when loopback is on
can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
can: peak_usb: add range checking in decode operations
can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
can: dev: __can_get_echo_skb(): fix real payload length return value for RTR frames
can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context
can: rx-offload: don't call kfree_skb() from IRQ context
ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
perf tools: Add missing swap for ino_generation
* net: xfrm: fix a race condition during allocing spi
net/xfrm/xfrm_state.c
hv_balloon: disable warning when floor reached
* genirq: Let GENERIC_IRQ_IPI select IRQ_DOMAIN_HIERARCHY
kernel/irq/Kconfig
btrfs: reschedule when cloning lots of extents
btrfs: sysfs: init devices outside of the chunk_mutex
nbd: don't update block size after device is started
* time: Prevent undefined behaviour in timespec64_to_ns()
include/linux/time64.h
kernel/time/itimer.c
mm: mempolicy: fix potential pte_unmap_unlock pte error
* ring-buffer: Fix recursion protection transitions between interrupt context
kernel/trace/ring_buffer.c
* regulator: defer probe when trying to get voltage from unresolved supply
drivers/regulator/core.c
* UPSTREAM: lib/vsprintf: Hash printed address for netdev bits fallback
lib/vsprintf.c
* UPSTREAM: lib/vsprintf: Prepare for more general use of ptr_to_id()
lib/vsprintf.c
* UPSTREAM: lib/vsprintf: Make ptr argument conts in ptr_to_id()
lib/vsprintf.c
UPSTREAM: parisc: Show unhashed hardware inventory
UPSTREAM: parisc: Show initial kernel memory layout unhashed
UPSTREAM: parisc: Show unhashed HPA of Dino chip
UPSTREAM: parisc: Show unhashed EISA EEPROM address
* UPSTREAM: bug: use %pB in BUG and stack protector failure
kernel/panic.c
lib/bug.c
* UPSTREAM: trace_uprobe: Use %lx to display offset
kernel/trace/trace_uprobe.c
UPSTREAM: kprobes: Fix random address output of blacklist file
* UPSTREAM: vsprintf: Replace memory barrier with static_key for random_ptr_key update
lib/vsprintf.c
UPSTREAM: lib/test_printf.c: accept "ptrval" as valid result for plain 'p' tests
* UPSTREAM: lib/vsprintf: Do not handle %pO[^F] as %px
lib/vsprintf.c
* UPSTREAM: cpuidle: menu: Retain tick when shallow state is selected
drivers/cpuidle/governors/menu.c
* UPSTREAM: xfrm: Make function xfrmi_get_link_net() static
net/xfrm/xfrm_interface.c
* UPSTREAM: xfrm: fix gro_cells leak when remove virtual xfrm interfaces
net/xfrm/xfrm_interface.c
* UPSTREAM: xfrm: Fix inbound traffic via XFRM interfaces across network namespaces
net/xfrm/xfrm_interface.c
net/xfrm/xfrm_policy.c
UPSTREAM: x86/realmode: Don't leak the trampoline kernel address
* UPSTREAM: arm64/vdso: don't leak kernel addresses
arch/arm64/kernel/vdso.c
* UPSTREAM: xfrm interface: fix memory leak on creation
net/xfrm/xfrm_interface.c
UPSTREAM: ARM: 8896/1: VDSO: Don't leak kernel addresses
* UPSTREAM: mm/filemap.c: don't bother dropping mmap_sem for zero size readahead
mm/filemap.c
* UPSTREAM: net: fix skb_panic to output real address
net/core/skbuff.c
* UPSTREAM: xfrm: clone XFRMA_SET_MARK in xfrm_do_migrate
net/xfrm/xfrm_state.c
* UPSTREAM: sched: idle: Avoid retaining the tick when it has been stopped
kernel/sched/idle.c
* UPSTREAM: cpuidle: menu: Handle stopped tick more aggressively
drivers/cpuidle/governors/menu.c
UPSTREAM: staging: android: vsoc: fix copy_from_user overrun
* UPSTREAM: ipv6: ndisc: RFC-ietf-6man-ra-pref64-09 is now published as RFC8781
include/net/ndisc.h
Merge 4.14.206 into android-4.14-q
Linux 4.14.206
powercap: restrict energy meter to root access
Merge 4.14.205 into android-4.14-q
Linux 4.14.205
arm64: dts: marvell: espressobin: add ethernet alias
* PM: runtime: Resume the device earlier in __device_release_driver()
drivers/base/dd.c
Revert "ARC: entry: fix potential EFA clobber when TIF_SYSCALL_TRACE"
ARC: stack unwinding: avoid indefinite looping
usb: mtu3: fix panic in mtu3_gadget_stop()
* USB: Add NO_LPM quirk for Kingston flash drive
drivers/usb/core/quirks.c
USB: serial: option: add Telit FN980 composition 0x1055
USB: serial: option: add LE910Cx compositions 0x1203, 0x1230, 0x1231
USB: serial: option: add Quectel EC200T module support
USB: serial: cyberjack: fix write-URB completion race
serial: txx9: add missing platform_driver_unregister() on error in serial_txx9_init
serial: 8250_mtk: Fix uart_get_baud_rate warning
* fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent
kernel/fork.c
vt: Disable KD_FONT_OP_COPY
ACPI: NFIT: Fix comparison to '-ENXIO'
drm/vc4: drv: Add error handding for bind
vsock: use ns_capable_noaudit() on socket create
* scsi: core: Don't start concurrent async scan on same host
drivers/scsi/scsi_scan.c
* blk-cgroup: Pre-allocate tree node on blkg_conf_prep
block/blk-cgroup.c
* blk-cgroup: Fix memleak on error path
block/blk-cgroup.c
* of: Fix reserved-memory overlap detection
drivers/of/of_reserved_mem.c
x86/kexec: Use up-to-dated screen_info copy to fill boot params
ARM: dts: sun4i-a10: fix cpu_alert temperature
* futex: Handle transient "ownerless" rtmutex state correctly
kernel/futex.c
* tracing: Fix out of bounds write in get_trace_buf
kernel/trace/trace.c
* ftrace: Handle tracing when switching between context
kernel/trace/trace.h
* ftrace: Fix recursion check for NMI test
kernel/trace/trace.h
gfs2: Wake up when sd_glock_disposal becomes zero
* mm: always have io_remap_pfn_range() set pgprot_decrypted()
include/asm-generic/pgtable.h
include/linux/mm.h
* kthread_worker: prevent queuing delayed work from timer_fn when it is being canceled
kernel/kthread.c
lib/crc32test: remove extra local_irq_disable/enable
* ALSA: usb-audio: Add implicit feedback quirk for Qu-16
sound/usb/pcm.c
Fonts: Replace discarded const qualifier
i40e: Memory leak in i40e_config_iwarp_qvlist
i40e: Fix of memory leak and integer truncation in i40e_virtchnl.c
i40e: Wrong truncation from u16 to u8
i40e: add num_vectors checker in iwarp handler
i40e: Fix a potential NULL pointer dereference
* blktrace: fix debugfs use after free
kernel/trace/blktrace.c
* Blktrace: bail out early if block debugfs is not configured
kernel/trace/blktrace.c
sfp: Fix error handing in sfp_probe()
* sctp: Fix COMM_LOST/CANT_STR_ASSOC err reporting on big-endian platforms
net/sctp/sm_sideeffect.c
net: usb: qmi_wwan: add Telit LE910Cx 0x1230 composition
gianfar: Account for Tx PTP timestamp in the skb headroom
gianfar: Replace skb_realloc_headroom with skb_cow_head for PTP
tipc: fix use-after-free in tipc_bcast_get_mode
xen/events: don't use chip_data for legacy IRQs
drm/i915: Break up error capture compression loops with cond_resched()
* ANDROID: Temporarily disable XFRM_USER_COMPAT filtering
net/xfrm/xfrm_state.c
net/xfrm/xfrm_user.c
Change-Id: Ic05bca51a3c627743eade54bb7c13a5ea040fa93
Signed-off-by: Lucas Wei <lucaswei@google.com>
|
||
|
Kees Cook
|
03404bd549 |
UPSTREAM: bug: use %pB in BUG and stack protector failure
The BUG and stack protector reports were still using a raw %p. This changes it to %pB for more meaningful output. Link: http://lkml.kernel.org/r/20180301225704.GA34198@beast Fixes: ad67b74d2469 ("printk: hash addresses printed with %p") Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Richard Weinberger <richard.weinberger@gmail.com>, Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 0862ca422b79cb5aa70823ee0f07f6b468f86070) Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I3497219f330e62d23ad85f933e3cb2eebd68e3a2 |
||
|
Yabin Cui
|
eaedbf9211 |
Revert "coresight: abort coresight tracing on kernel crash"
This reverts commit
|
||
|
lucaswei
|
c6c1fdd145 |
Merge android-4.14 (4.14.150) into android-msm-floral-4.14-lts
Merge 4.14.150 into android-4.14
Linux 4.14.150
xfs: clear sb->s_fs_info on mount failure
x86/asm: Fix MWAITX C-state hint value
* tracing: Get trace_array reference for available_tracers files
kernel/trace/trace.c
ftrace: Get a reference counter for the trace_array on filter files
tracing/hwlat: Don't ignore outer-loop duration when calculating max_latency
tracing/hwlat: Report total time spent in all NMIs during the sample
media: stkwebcam: fix runtime PM after driver unbind
* Fix the locking in dcache_readdir() and friends
fs/libfs.c
MIPS: Disable Loongson MMI instructions for kernel build
NFS: Fix O_DIRECT accounting of number of bytes read/written
btrfs: fix incorrect updating of log root tree
iio: adc: hx711: fix bug in sampling of data
iio: hx711: add delay until DOUT is ready
Staging: fbtft: fix memory leak in fbtft_framebuffer_alloc
* gpiolib: don't clear FLAG_IS_OUT when emulating open-drain/open-source
drivers/gpio/gpiolib.c
firmware: google: increment VPD key_len properly
* kernel/sysctl.c: do not override max_threads provided by userspace
kernel/fork.c
CIFS: Force reval dentry if LOOKUP_REVAL flag is set
CIFS: Force revalidate inode when dentry is stale
CIFS: Gracefully handle QueryInfo errors during open
perf inject jit: Fix JIT_CODE_MOVE filename
perf llvm: Don't access out-of-scope array
efivar/ssdt: Don't iterate over EFI vars if no SSDT override was specified
iio: light: opt3001: fix mutex unlock race
iio: adc: axp288: Override TS pin bias current for some models
iio: adc: ad799x: fix probe error handling
staging: vt6655: Fix memory leak in vt6655_probe
USB: legousbtower: fix use-after-free on release
USB: legousbtower: fix open after failed reset request
USB: legousbtower: fix potential NULL-deref on disconnect
USB: legousbtower: fix deadlock on disconnect
USB: legousbtower: fix slab info leak at probe
usb: renesas_usbhs: gadget: Fix usb_ep_set_{halt,wedge}() behavior
usb: renesas_usbhs: gadget: Do not discard queues in usb_ep_set_{halt,wedge}()
USB: dummy-hcd: fix power budget for SuperSpeed mode
USB: microtek: fix info-leak at probe
USB: usblcd: fix I/O after disconnect
USB: serial: fix runtime PM after driver unbind
USB: serial: option: add support for Cinterion CLS8 devices
USB: serial: option: add Telit FN980 compositions
USB: serial: ftdi_sio: add device IDs for Sienna and Echelon PL-20
USB: serial: keyspan: fix NULL-derefs on open() and write()
serial: uartlite: fix exit path null pointer
USB: ldusb: fix NULL-derefs on driver unbind
USB: chaoskey: fix use-after-free on release
USB: usblp: fix runtime PM after driver unbind
USB: iowarrior: fix use-after-free after driver unbind
USB: iowarrior: fix use-after-free on release
USB: iowarrior: fix use-after-free on disconnect
USB: adutux: fix use-after-free on release
USB: adutux: fix NULL-derefs on disconnect
USB: adutux: fix use-after-free on disconnect
USB: adutux: remove redundant variable minor
* xhci: Increase STS_SAVE timeout in xhci_suspend()
drivers/usb/host/xhci.c
* usb: xhci: wait for CNR controller not ready bit in xhci resume
drivers/usb/host/xhci.c
* xhci: Check all endpoints for LPM timeout
drivers/usb/host/xhci.c
* xhci: Prevent device initiated U1/U2 link pm if exit latency is too long
drivers/usb/host/xhci.c
* xhci: Fix false warning message about wrong bounce buffer write length
drivers/usb/host/xhci-ring.c
USB: usb-skeleton: fix NULL-deref on disconnect
USB: usb-skeleton: fix runtime PM after driver unbind
USB: yurex: fix NULL-derefs on disconnect
USB: yurex: Don't retry on unexpected errors
* USB: rio500: Remove Rio 500 kernel driver
drivers/usb/misc/Kconfig
drivers/usb/misc/Makefile
* f2fs: use EINVAL for superblock with invalid magic
fs/f2fs/super.c
* panic: ensure preemption is disabled during panic()
kernel/panic.c
* UPSTREAM: mm: vmalloc: show number of vmalloc pages in /proc/meminfo
fs/proc/meminfo.c
include/linux/vmalloc.h
mm/vmalloc.c
* BACKPORT: PM/sleep: Expose suspend stats in sysfs
kernel/power/main.c
* UPSTREAM: power: supply: Init device wakeup after device_add()
drivers/power/supply/power_supply_core.c
* UPSTREAM: PM / wakeup: Unexport wakeup_source_sysfs_{add,remove}()
drivers/base/power/wakeup_stats.c
* UPSTREAM: PM / wakeup: Register wakeup class kobj after device is added
drivers/base/power/power.h
drivers/base/power/sysfs.c
drivers/base/power/wakeup.c
drivers/base/power/wakeup_stats.c
* BACKPORT: PM / wakeup: Fix sysfs registration error path
drivers/base/power/wakeup.c
* BACKPORT: PM / wakeup: Show wakeup sources stats in sysfs
drivers/base/power/Makefile
drivers/base/power/power.h
drivers/base/power/wakeup.c
drivers/base/power/wakeup_stats.c
fs/eventpoll.c
include/linux/pm_wakeup.h
kernel/power/wakelock.c
kernel/time/alarmtimer.c
* UPSTREAM: PM / wakeup: Print warn if device gets enabled as wakeup source during sleep
drivers/base/power/wakeup.c
* UPSTREAM: PM / wakeup: Use wakeup_source_register() in wakelock.c
kernel/power/wakelock.c
* UPSTREAM: PM / wakeup: Only update last time for active wakeup sources
drivers/base/power/wakeup.c
kernel/power/wakelock.c
* UPSTREAM: PM / core: Add support to skip power management in device/driver model
drivers/base/cpu.c
drivers/base/power/main.c
drivers/base/power/sysfs.c
include/linux/device.h
include/linux/pm.h
Change-Id: I121a2fe2c77b21580e8c225046ece16555dfcec7
Signed-off-by: lucaswei <lucaswei@google.com>
|
||
|
Will Deacon
|
dd676a61c2 |
panic: ensure preemption is disabled during panic()
commit 20bb759a66be52cf4a9ddd17fddaf509e11490cd upstream. Calling 'panic()' on a kernel with CONFIG_PREEMPT=y can leave the calling CPU in an infinite loop, but with interrupts and preemption enabled. From this state, userspace can continue to be scheduled, despite the system being "dead" as far as the kernel is concerned. This is easily reproducible on arm64 when booting with "nosmp" on the command line; a couple of shell scripts print out a periodic "Ping" message whilst another triggers a crash by writing to /proc/sysrq-trigger: | sysrq: Trigger a crash | Kernel panic - not syncing: sysrq triggered crash | CPU: 0 PID: 1 Comm: init Not tainted 5.2.15 #1 | Hardware name: linux,dummy-virt (DT) | Call trace: | dump_backtrace+0x0/0x148 | show_stack+0x14/0x20 | dump_stack+0xa0/0xc4 | panic+0x140/0x32c | sysrq_handle_reboot+0x0/0x20 | __handle_sysrq+0x124/0x190 | write_sysrq_trigger+0x64/0x88 | proc_reg_write+0x60/0xa8 | __vfs_write+0x18/0x40 | vfs_write+0xa4/0x1b8 | ksys_write+0x64/0xf0 | __arm64_sys_write+0x14/0x20 | el0_svc_common.constprop.0+0xb0/0x168 | el0_svc_handler+0x28/0x78 | el0_svc+0x8/0xc | Kernel Offset: disabled | CPU features: 0x0002,24002004 | Memory Limit: none | ---[ end Kernel panic - not syncing: sysrq triggered crash ]--- | Ping 2! | Ping 1! | Ping 1! | Ping 2! The issue can also be triggered on x86 kernels if CONFIG_SMP=n, otherwise local interrupts are disabled in 'smp_send_stop()'. Disable preemption in 'panic()' before re-enabling interrupts. Link: http://lkml.kernel.org/r/20191002123538.22609-1-will@kernel.org Link: https://lore.kernel.org/r/BX1W47JXPMR8.58IYW53H6M5N@dragonstone Signed-off-by: Will Deacon <will@kernel.org> Reported-by: Xogium <contact@xogium.me> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Feng Tang <feng.tang@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Eva Huang
|
2de9e223cf |
arm64/config: b1c1: support panic on warn by config
Add config: CONFIG_PANIC_ON_WARN_DEFAULT_ENABLE This patchset adds CONFIG_PANIC_ON_DEFAULT_ENABLE to determine the behavior at build time. Even though we could do same thing by kernel parameter, it's not handy for vendor kernel because they usually store kernel cmd parameter into different partition with kernel so that it needs platform image rebuild to change kernel cmd line as well as kernel image. To remove such dependency to save much time, this patch adds default enable by Kconfig at build time. Bug: 119288681 Bug: 134156102 Change-Id: Ib73e6e2c8d2c2e87ad96cd4c59feeb1c8102d041 Signed-off-by: Eva Huang <evahuang@google.com> |
||
|
Blagovest Kolenichev
|
0927a7b7f2 |
Merge android-4.14-p.91 (eef4cf6) into msm-4.14
* refs/heads/tmp-eef4cf6: Revert "mmc: core: Allow BKOPS and CACHE ctrl even if no HPI support" Linux 4.14.91 drm/ioctl: Fix Spectre v1 vulnerabilities proc/sysctl: don't return ENOMEM on lookup when a table is unregistering mm: don't miss the last page because of round-off error ubifs: Handle re-linking of inodes correctly while recovery spi: imx: mx51-ecspi: Move some initialisation to prepare_message hook. spi: imx: add a device specific prepare_message callback iwlwifi: add new cards for 9560, 9462, 9461 and killer series iwlwifi: mvm: don't send GEO_TX_POWER_LIMIT to old firmwares panic: avoid deadlocks in re-entrant console drivers x86/mtrr: Don't copy uninitialized gentry fields back to userspace Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels KVM: Fix UAF in nested posted interrupt processing kvm: x86: Add AMD's EX_CFG to the list of ignored MSRs posix-timers: Fix division by zero bug gpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers gpio: max7301: fix driver for use with CONFIG_VMAP_STACK mmc: omap_hsmmc: fix DMA API warning mmc: core: Use a minimum 1600ms timeout when enabling CACHE ctrl mmc: core: Allow BKOPS and CACHE ctrl even if no HPI support mmc: core: Reset HPI enabled state during re-init and in case of errors scsi: sd: use mempool for discard special page USB: serial: option: add Telit LN940 series USB: serial: option: add Fibocom NL668 series USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode) USB: serial: option: add HP lt4132 USB: serial: option: add GosunCn ZTE WeLink ME3630 USB: xhci: fix 'broken_suspend' placement in struct xchi_hcd xhci: Don't prevent USB2 bus suspend in state check intended for USB3 only USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data cifs: integer overflow in in SMB2_ioctl() perf record: Synthesize features before events in pipe mode ib_srpt: Fix a use-after-free in __srpt_close_all_ch() ubifs: Fix directory size calculation for symlinks ASoC: sta32x: set ->component pointer in private struct block: fix infinite loop if the device loses discard capability block: break discard submissions into the user defined size Conflicts: drivers/mmc/core/mmc.c Change-Id: I1f0d24983198c7aa704dd334696e72dc8bf93b67 Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org> |
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Sergey Senozhatsky
|
e1240a10f3 |
panic: avoid deadlocks in re-entrant console drivers
commit c7c3f05e341a9a2bd1a92993d4f996cfd6e7348e upstream.
From printk()/serial console point of view panic() is special, because
it may force CPU to re-enter printk() or/and serial console driver.
Therefore, some of serial consoles drivers are re-entrant. E.g. 8250:
serial8250_console_write()
{
if (port->sysrq)
locked = 0;
else if (oops_in_progress)
locked = spin_trylock_irqsave(&port->lock, flags);
else
spin_lock_irqsave(&port->lock, flags);
...
}
panic() does set oops_in_progress via bust_spinlocks(1), so in theory
we should be able to re-enter serial console driver from panic():
CPU0
<NMI>
uart_console_write()
serial8250_console_write() // if (oops_in_progress)
// spin_trylock_irqsave()
call_console_drivers()
console_unlock()
console_flush_on_panic()
bust_spinlocks(1) // oops_in_progress++
panic()
<NMI/>
spin_lock_irqsave(&port->lock, flags) // spin_lock_irqsave()
serial8250_console_write()
call_console_drivers()
console_unlock()
printk()
...
However, this does not happen and we deadlock in serial console on
port->lock spinlock. And the problem is that console_flush_on_panic()
called after bust_spinlocks(0):
void panic(const char *fmt, ...)
{
bust_spinlocks(1);
...
bust_spinlocks(0);
console_flush_on_panic();
...
}
bust_spinlocks(0) decrements oops_in_progress, so oops_in_progress
can go back to zero. Thus even re-entrant console drivers will simply
spin on port->lock spinlock. Given that port->lock may already be
locked either by a stopped CPU, or by the very same CPU we execute
panic() on (for instance, NMI panic() on printing CPU) the system
deadlocks and does not reboot.
Fix this by removing bust_spinlocks(0), so oops_in_progress is always
set in panic() now and, thus, re-entrant console drivers will trylock
the port->lock instead of spinning on it forever, when we call them
from console_flush_on_panic().
Link: http://lkml.kernel.org/r/20181025101036.6823-1-sergey.senozhatsky@gmail.com
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Daniel Wang <wonderfly@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Peter Feiner <pfeiner@google.com>
Cc: linux-serial@vger.kernel.org
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
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Lingutla Chandrasekhar
|
391a598903 |
soc: qcom: Register default dump entries to minidump table
Add below common dump entries to minidump table: All memory dump table entries, kernel data/bss sections, percpu static sections, rtb, logbuf, wdogdata, lpm_debug, stackpointer, and current task struct. Also add name for memory dump table entries to accommodate Minidump support. Change-Id: I45d121bc36b40332cfd0a0f5142572c6ce8f8a26 Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org> [isaacm@codeaurora.org: Resolve trivial merge conflicts] Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org> |
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Rama Aparna Mallavarapu
|
15f6009366 |
coresight: abort coresight tracing on kernel crash
Add trace events to control aborting CoreSight trace dynamically based on module parameter. Coresight driver will dump any trace present in the current sink in case we hit a kernel panic, user fault or an undefined instruction. Change-Id: I668c8cda285250a0b8dcccd2c1d2a8471977ce5c Signed-off-by: Satyajit Desai <sadesai@codeaurora.org> Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org> |
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|
Kees Cook
|
7a46ec0e2f |
locking/refcounts, x86/asm: Implement fast refcount overflow protection
This implements refcount_t overflow protection on x86 without a noticeable performance impact, though without the fuller checking of REFCOUNT_FULL. This is done by duplicating the existing atomic_t refcount implementation but with normally a single instruction added to detect if the refcount has gone negative (e.g. wrapped past INT_MAX or below zero). When detected, the handler saturates the refcount_t to INT_MIN / 2. With this overflow protection, the erroneous reference release that would follow a wrap back to zero is blocked from happening, avoiding the class of refcount-overflow use-after-free vulnerabilities entirely. Only the overflow case of refcounting can be perfectly protected, since it can be detected and stopped before the reference is freed and left to be abused by an attacker. There isn't a way to block early decrements, and while REFCOUNT_FULL stops increment-from-zero cases (which would be the state _after_ an early decrement and stops potential double-free conditions), this fast implementation does not, since it would require the more expensive cmpxchg loops. Since the overflow case is much more common (e.g. missing a "put" during an error path), this protection provides real-world protection. For example, the two public refcount overflow use-after-free exploits published in 2016 would have been rendered unexploitable: http://perception-point.io/2016/01/14/analysis-and-exploitation-of-a-linux-kernel-vulnerability-cve-2016-0728/ http://cyseclabs.com/page?n=02012016 This implementation does, however, notice an unchecked decrement to zero (i.e. caller used refcount_dec() instead of refcount_dec_and_test() and it resulted in a zero). Decrements under zero are noticed (since they will have resulted in a negative value), though this only indicates that a use-after-free may have already happened. Such notifications are likely avoidable by an attacker that has already exploited a use-after-free vulnerability, but it's better to have them reported than allow such conditions to remain universally silent. On first overflow detection, the refcount value is reset to INT_MIN / 2 (which serves as a saturation value) and a report and stack trace are produced. When operations detect only negative value results (such as changing an already saturated value), saturation still happens but no notification is performed (since the value was already saturated). On the matter of races, since the entire range beyond INT_MAX but before 0 is negative, every operation at INT_MIN / 2 will trap, leaving no overflow-only race condition. As for performance, this implementation adds a single "js" instruction to the regular execution flow of a copy of the standard atomic_t refcount operations. (The non-"and_test" refcount_dec() function, which is uncommon in regular refcount design patterns, has an additional "jz" instruction to detect reaching exactly zero.) Since this is a forward jump, it is by default the non-predicted path, which will be reinforced by dynamic branch prediction. The result is this protection having virtually no measurable change in performance over standard atomic_t operations. The error path, located in .text.unlikely, saves the refcount location and then uses UD0 to fire a refcount exception handler, which resets the refcount, handles reporting, and returns to regular execution. This keeps the changes to .text size minimal, avoiding return jumps and open-coded calls to the error reporting routine. Example assembly comparison: refcount_inc() before: .text: ffffffff81546149: f0 ff 45 f4 lock incl -0xc(%rbp) refcount_inc() after: .text: ffffffff81546149: f0 ff 45 f4 lock incl -0xc(%rbp) ffffffff8154614d: 0f 88 80 d5 17 00 js ffffffff816c36d3 ... .text.unlikely: ffffffff816c36d3: 48 8d 4d f4 lea -0xc(%rbp),%rcx ffffffff816c36d7: 0f ff (bad) These are the cycle counts comparing a loop of refcount_inc() from 1 to INT_MAX and back down to 0 (via refcount_dec_and_test()), between unprotected refcount_t (atomic_t), fully protected REFCOUNT_FULL (refcount_t-full), and this overflow-protected refcount (refcount_t-fast): 2147483646 refcount_inc()s and 2147483647 refcount_dec_and_test()s: cycles protections atomic_t 82249267387 none refcount_t-fast 82211446892 overflow, untested dec-to-zero refcount_t-full 144814735193 overflow, untested dec-to-zero, inc-from-zero This code is a modified version of the x86 PAX_REFCOUNT atomic_t overflow defense from the last public patch of PaX/grsecurity, based on my understanding of the code. Changes or omissions from the original code are mine and don't reflect the original grsecurity/PaX code. Thanks to PaX Team for various suggestions for improvement for repurposing this code to be a refcount-only protection. Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christoph Hellwig <hch@infradead.org> Cc: David S. Miller <davem@davemloft.net> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Elena Reshetova <elena.reshetova@intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Greg KH <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: James Bottomley <James.Bottomley@hansenpartnership.com> Cc: Jann Horn <jannh@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: arozansk@redhat.com Cc: axboe@kernel.dk Cc: kernel-hardening@lists.openwall.com Cc: linux-arch <linux-arch@vger.kernel.org> Link: http://lkml.kernel.org/r/20170815161924.GA133115@beast Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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|
Ingo Molnar
|
b17b01533b |
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>
We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/debug.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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|
Vijay Kumar
|
7db60d05e5 |
sparc64: Send break twice from console to return to boot prom
Now we can also jump to boot prom from sunhv console by sending break twice on console for both running and panicked kernel cases. Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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|
Linus Torvalds
|
7d91de7443 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek: - Add Petr Mladek, Sergey Senozhatsky as printk maintainers, and Steven Rostedt as the printk reviewer. This idea came up after the discussion about printk issues at Kernel Summit. It was formulated and discussed at lkml[1]. - Extend a lock-less NMI per-cpu buffers idea to handle recursive printk() calls by Sergey Senozhatsky[2]. It is the first step in sanitizing printk as discussed at Kernel Summit. The change allows to see messages that would normally get ignored or would cause a deadlock. Also it allows to enable lockdep in printk(). This already paid off. The testing in linux-next helped to discover two old problems that were hidden before[3][4]. - Remove unused parameter by Sergey Senozhatsky. Clean up after a past change. [1] http://lkml.kernel.org/r/1481798878-31898-1-git-send-email-pmladek@suse.com [2] http://lkml.kernel.org/r/20161227141611.940-1-sergey.senozhatsky@gmail.com [3] http://lkml.kernel.org/r/20170215044332.30449-1-sergey.senozhatsky@gmail.com [4] http://lkml.kernel.org/r/20170217015932.11898-1-sergey.senozhatsky@gmail.com * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk: printk: drop call_console_drivers() unused param printk: convert the rest to printk-safe printk: remove zap_locks() function printk: use printk_safe buffers in printk printk: report lost messages in printk safe/nmi contexts printk: always use deferred printk when flush printk_safe lines printk: introduce per-cpu safe_print seq buffer printk: rename nmi.c and exported api printk: use vprintk_func in vprintk() MAINTAINERS: Add printk maintainers |
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|
Sergey Senozhatsky
|
f92bac3b14 |
printk: rename nmi.c and exported api
A preparation patch for printk_safe work. No functional change. - rename nmi.c to print_safe.c - add `printk_safe' prefix to some (which used both by printk-safe and printk-nmi) of the exported functions. Link: http://lkml.kernel.org/r/20161227141611.940-3-sergey.senozhatsky@gmail.com Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jan Kara <jack@suse.cz> Cc: Tejun Heo <tj@kernel.org> Cc: Calvin Owens <calvinowens@fb.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Petr Mladek <pmladek@suse.com> |
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|
Jiri Slaby
|
ff7a28a074 |
kernel/panic.c: add missing \n
When a system panics, the "Rebooting in X seconds.." message is never printed because it lacks a new line. Fix it. Link: http://lkml.kernel.org/r/20170119114751.2724-1-jslaby@suse.cz Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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|
Larry Finger
|
5eb7c0d04f |
taint/module: Fix problems when out-of-kernel driver defines true or false
Commit |
||
|
Petr Mladek
|
7fd8329ba5 |
taint/module: Clean up global and module taint flags handling
The commit |
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|
Hidehiro Kawai
|
0ee59413c9 |
x86/panic: replace smp_send_stop() with kdump friendly version in panic path
Daniel Walker reported problems which happens when
crash_kexec_post_notifiers kernel option is enabled
(https://lkml.org/lkml/2015/6/24/44).
In that case, smp_send_stop() is called before entering kdump routines
which assume other CPUs are still online. As the result, for x86, kdump
routines fail to save other CPUs' registers and disable virtualization
extensions.
To fix this problem, call a new kdump friendly function,
crash_smp_send_stop(), instead of the smp_send_stop() when
crash_kexec_post_notifiers is enabled. crash_smp_send_stop() is a weak
function, and it just call smp_send_stop(). Architecture codes should
override it so that kdump can work appropriately. This patch only
provides x86-specific version.
For Xen's PV kernel, just keep the current behavior.
NOTES:
- Right solution would be to place crash_smp_send_stop() before
__crash_kexec() invocation in all cases and remove smp_send_stop(), but
we can't do that until all architectures implement own
crash_smp_send_stop()
- crash_smp_send_stop()-like work is still needed by
machine_crash_shutdown() because crash_kexec() can be called without
entering panic()
Fixes:
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Hidehiro Kawai
|
b26e27ddfd |
kexec: use core_param for crash_kexec_post_notifiers boot option
crash_kexec_post_notifiers ia a boot option which controls whether the 1st kernel calls panic notifiers or not before booting the 2nd kernel. However, there is no need to limit it to being modifiable only at boot time. So, use core_param instead of early_param. Link: http://lkml.kernel.org/r/20160705113327.5864.43139.stgit@softrs Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Cc: Dave Young <dyoung@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Petr Mladek
|
cf9b1106c8 |
printk/nmi: flush NMI messages on the system panic
In NMI context, printk() messages are stored into per-CPU buffers to avoid a possible deadlock. They are normally flushed to the main ring buffer via an IRQ work. But the work is never called when the system calls panic() in the very same NMI handler. This patch tries to flush NMI buffers before the crash dump is generated. In this case it does not risk a double release and bails out when the logbuf_lock is already taken. The aim is to get the messages into the main ring buffer when possible. It makes them better accessible in the vmcore. Then the patch tries to flush the buffers second time when other CPUs are down. It might be more aggressive and reset logbuf_lock. The aim is to get the messages available for the consequent kmsg_dump() and console_flush_on_panic() calls. The patch causes vprintk_emit() to be called even in NMI context again. But it is done via printk_deferred() so that the console handling is skipped. Consoles use internal locks and we could not prevent a deadlock easily. They are explicitly called later when the crash dump is not generated, see console_flush_on_panic(). Signed-off-by: Petr Mladek <pmladek@suse.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: David Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Jiri Kosina <jkosina@suse.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Hidehiro Kawai
|
ebc41f20d7 |
panic: change nmi_panic from macro to function
Commit |
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Josh Poimboeuf
|
2553b67a1f |
lib/bug.c: use common WARN helper
The traceoff_on_warning option doesn't have any effect on s390, powerpc, arm64, parisc, and sh because there are two different types of WARN implementations: 1) The above mentioned architectures treat WARN() as a special case of a BUG() exception. They handle warnings in report_bug() in lib/bug.c. 2) All other architectures just call warn_slowpath_*() directly. Their warnings are handled in warn_slowpath_common() in kernel/panic.c. Support traceoff_on_warning on all architectures and prevent any future divergence by using a single common function to emit the warning. Also remove the '()' from '%pS()', because the parentheses look funky: [ 45.607629] WARNING: at /root/warn_mod/warn_mod.c:17 .init_dummy+0x20/0x40 [warn_mod]() Reported-by: Chunyu Hu <chuhu@redhat.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Tested-by: Prarit Bhargava <prarit@redhat.com> Acked-by: Prarit Bhargava <prarit@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Tejun Heo
|
8d91f8b153 |
printk: do cond_resched() between lines while outputting to consoles
@console_may_schedule tracks whether console_sem was acquired through lock or trylock. If the former, we're inside a sleepable context and console_conditional_schedule() performs cond_resched(). This allows console drivers which use console_lock for synchronization to yield while performing time-consuming operations such as scrolling. However, the actual console outputting is performed while holding irq-safe logbuf_lock, so console_unlock() clears @console_may_schedule before starting outputting lines. Also, only a few drivers call console_conditional_schedule() to begin with. This means that when a lot of lines need to be output by console_unlock(), for example on a console registration, the task doing console_unlock() may not yield for a long time on a non-preemptible kernel. If this happens with a slow console devices, for example a serial console, the outputting task may occupy the cpu for a very long time. Long enough to trigger softlockup and/or RCU stall warnings, which in turn pile more messages, sometimes enough to trigger the next cycle of warnings incapacitating the system. Fix it by making console_unlock() insert cond_resched() between lines if @console_may_schedule. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Calvin Owens <calvinowens@fb.com> Acked-by: Jan Kara <jack@suse.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Kyle McMartin <kyle@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Hidehiro Kawai
|
7bbee5ca38 |
kexec: Fix race between panic() and crash_kexec()
Currently, panic() and crash_kexec() can be called at the same time.
For example (x86 case):
CPU 0:
oops_end()
crash_kexec()
mutex_trylock() // acquired
nmi_shootdown_cpus() // stop other CPUs
CPU 1:
panic()
crash_kexec()
mutex_trylock() // failed to acquire
smp_send_stop() // stop other CPUs
infinite loop
If CPU 1 calls smp_send_stop() before nmi_shootdown_cpus(), kdump
fails.
In another case:
CPU 0:
oops_end()
crash_kexec()
mutex_trylock() // acquired
<NMI>
io_check_error()
panic()
crash_kexec()
mutex_trylock() // failed to acquire
infinite loop
Clearly, this is an undesirable result.
To fix this problem, this patch changes crash_kexec() to exclude others
by using the panic_cpu atomic.
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: kexec@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Minfei Huang <mnfhuang@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20151210014630.25437.94161.stgit@softrs
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Hidehiro Kawai
|
58c5661f21 |
panic, x86: Allow CPUs to save registers even if looping in NMI context
Currently, kdump_nmi_shootdown_cpus(), a subroutine of crash_kexec(),
sends an NMI IPI to CPUs which haven't called panic() to stop them,
save their register information and do some cleanups for crash dumping.
However, if such a CPU is infinitely looping in NMI context, we fail to
save its register information into the crash dump.
For example, this can happen when unknown NMIs are broadcast to all
CPUs as follows:
CPU 0 CPU 1
=========================== ==========================
receive an unknown NMI
unknown_nmi_error()
panic() receive an unknown NMI
spin_trylock(&panic_lock) unknown_nmi_error()
crash_kexec() panic()
spin_trylock(&panic_lock)
panic_smp_self_stop()
infinite loop
kdump_nmi_shootdown_cpus()
issue NMI IPI -----------> blocked until IRET
infinite loop...
Here, since CPU 1 is in NMI context, the second NMI from CPU 0 is
blocked until CPU 1 executes IRET. However, CPU 1 never executes IRET,
so the NMI is not handled and the callback function to save registers is
never called.
In practice, this can happen on some servers which broadcast NMIs to all
CPUs when the NMI button is pushed.
To save registers in this case, we need to:
a) Return from NMI handler instead of looping infinitely
or
b) Call the callback function directly from the infinite loop
Inherently, a) is risky because NMI is also used to prevent corrupted
data from being propagated to devices. So, we chose b).
This patch does the following:
1. Move the infinite looping of CPUs which haven't called panic() in NMI
context (actually done by panic_smp_self_stop()) outside of panic() to
enable us to refer pt_regs. Please note that panic_smp_self_stop() is
still used for normal context.
2. Call a callback of kdump_nmi_shootdown_cpus() directly to save
registers and do some cleanups after setting waiting_for_crash_ipi which
is used for counting down the number of CPUs which handled the callback
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Gobinda Charan Maji <gobinda.cemk07@gmail.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Javi Merino <javi.merino@arm.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: kexec@lists.infradead.org
Cc: linux-doc@vger.kernel.org
Cc: lkml <linux-kernel@vger.kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Link: http://lkml.kernel.org/r/20151210014628.25437.75256.stgit@softrs
[ Cleanup comments, fixup formatting. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Hidehiro Kawai
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1717f2096b |
panic, x86: Fix re-entrance problem due to panic on NMI
If panic on NMI happens just after panic() on the same CPU, panic() is recursively called. Kernel stalls, as a result, after failing to acquire panic_lock. To avoid this problem, don't call panic() in NMI context if we've already entered panic(). For that, introduce nmi_panic() macro to reduce code duplication. In the case of panic on NMI, don't return from NMI handlers if another CPU already panicked. Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: Don Zickus <dzickus@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Gobinda Charan Maji <gobinda.cemk07@gmail.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Javi Merino <javi.merino@arm.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: kexec@lists.infradead.org Cc: linux-doc@vger.kernel.org Cc: lkml <linux-kernel@vger.kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Seth Jennings <sjenning@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ulrich Obergfell <uobergfe@redhat.com> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Link: http://lkml.kernel.org/r/20151210014626.25437.13302.stgit@softrs [ Cleanup comments, fixup formatting. ] Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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Vitaly Kuznetsov
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7625b3a000 |
kernel/panic.c: turn off locks debug before releasing console lock
Commit |
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Vitaly Kuznetsov
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08d78658f3 |
panic: release stale console lock to always get the logbuf printed out
In some cases we may end up killing the CPU holding the console lock while still having valuable data in logbuf. E.g. I'm observing the following: - A crash is happening on one CPU and console_unlock() is being called on some other. - console_unlock() tries to print out the buffer before releasing the lock and on slow console it takes time. - in the meanwhile crashing CPU does lots of printk()-s with valuable data (which go to the logbuf) and sends IPIs to all other CPUs. - console_unlock() finishes printing previous chunk and enables interrupts before trying to print out the rest, the CPU catches the IPI and never releases console lock. This is not the only possible case: in VT/fb subsystems we have many other console_lock()/console_unlock() users. Non-masked interrupts (or receiving NMI in case of extreme slowness) will have the same result. Getting the whole console buffer printed out on crash should be top priority. [akpm@linux-foundation.org: tweak comment text] Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Baoquan He <bhe@redhat.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Xie XiuQi <xiexiuqi@huawei.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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HATAYAMA Daisuke
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5375b708f2 |
kernel/panic/kexec: fix "crash_kexec_post_notifiers" option issue in oops path
Commit
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HATAYAMA Daisuke
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f45d85ff1f |
kernel/panic: call the 2nd crash_kexec() only if crash_kexec_post_notifiers is enabled
For compatibility with the behaviour before the commit
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Seth Jennings
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c5f4546593 |
livepatch: kernel: add TAINT_LIVEPATCH
This adds a new taint flag to indicate when the kernel or a kernel module has been live patched. This will provide a clean indication in bug reports that live patching was used. Additionally, if the crash occurs in a live patched function, the live patch module will appear beside the patched function in the backtrace. Signed-off-by: Seth Jennings <sjenning@redhat.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Reviewed-by: Petr Mladek <pmladek@suse.cz> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> |
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Prarit Bhargava
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9e3961a097 |
kernel: add panic_on_warn
There have been several times where I have had to rebuild a kernel to
cause a panic when hitting a WARN() in the code in order to get a crash
dump from a system. Sometimes this is easy to do, other times (such as
in the case of a remote admin) it is not trivial to send new images to
the user.
A much easier method would be a switch to change the WARN() over to a
panic. This makes debugging easier in that I can now test the actual
image the WARN() was seen on and I do not have to engage in remote
debugging.
This patch adds a panic_on_warn kernel parameter and
/proc/sys/kernel/panic_on_warn calls panic() in the
warn_slowpath_common() path. The function will still print out the
location of the warning.
An example of the panic_on_warn output:
The first line below is from the WARN_ON() to output the WARN_ON()'s
location. After that the panic() output is displayed.
WARNING: CPU: 30 PID: 11698 at /home/prarit/dummy_module/dummy-module.c:25 init_dummy+0x1f/0x30 [dummy_module]()
Kernel panic - not syncing: panic_on_warn set ...
CPU: 30 PID: 11698 Comm: insmod Tainted: G W OE 3.17.0+ #57
Hardware name: Intel Corporation S2600CP/S2600CP, BIOS RMLSDP.86I.00.29.D696.1311111329 11/11/2013
0000000000000000 000000008e3f87df ffff88080f093c38 ffffffff81665190
0000000000000000 ffffffff818aea3d ffff88080f093cb8 ffffffff8165e2ec
ffffffff00000008 ffff88080f093cc8 ffff88080f093c68 000000008e3f87df
Call Trace:
[<ffffffff81665190>] dump_stack+0x46/0x58
[<ffffffff8165e2ec>] panic+0xd0/0x204
[<ffffffffa038e05f>] ? init_dummy+0x1f/0x30 [dummy_module]
[<ffffffff81076b90>] warn_slowpath_common+0xd0/0xd0
[<ffffffffa038e040>] ? dummy_greetings+0x40/0x40 [dummy_module]
[<ffffffff81076c8a>] warn_slowpath_null+0x1a/0x20
[<ffffffffa038e05f>] init_dummy+0x1f/0x30 [dummy_module]
[<ffffffff81002144>] do_one_initcall+0xd4/0x210
[<ffffffff811b52c2>] ? __vunmap+0xc2/0x110
[<ffffffff810f8889>] load_module+0x16a9/0x1b30
[<ffffffff810f3d30>] ? store_uevent+0x70/0x70
[<ffffffff810f49b9>] ? copy_module_from_fd.isra.44+0x129/0x180
[<ffffffff810f8ec6>] SyS_finit_module+0xa6/0xd0
[<ffffffff8166cf29>] system_call_fastpath+0x12/0x17
Successfully tested by me.
hpa said: There is another very valid use for this: many operators would
rather a machine shuts down than being potentially compromised either
functionally or security-wise.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Xie XiuQi
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bc53a3f46d |
kernel/panic.c: update comments for print_tainted
Commit
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Josh Hunt
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69361eef90 |
panic: add TAINT_SOFTLOCKUP
This taint flag will be set if the system has ever entered a softlockup state. Similar to TAINT_WARN it is useful to know whether or not the system has been in a softlockup state when debugging. [akpm@linux-foundation.org: apply the taint before calling panic()] Signed-off-by: Josh Hunt <johunt@akamai.com> Cc: Jason Baron <jbaron@akamai.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Masami Hiramatsu
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f06e5153f4 |
kernel/panic.c: add "crash_kexec_post_notifiers" option for kdump after panic_notifers
Add a "crash_kexec_post_notifiers" boot option to run kdump after running panic_notifiers and dump kmsg. This can help rare situations where kdump fails because of unstable crashed kernel or hardware failure (memory corruption on critical data/code), or the 2nd kernel is already broken by the 1st kernel (it's a broken behavior, but who can guarantee that the "crashed" kernel works correctly?). Usage: add "crash_kexec_post_notifiers" to kernel boot option. Note that this actually increases risks of the failure of kdump. This option should be set only if you worry about the rare case of kdump failure rather than increasing the chance of success. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Motohiro Kosaki <Motohiro.Kosaki@us.fujitsu.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com> Cc: Satoru MORIYA <satoru.moriya.br@hitachi.com> Cc: Tomoki Sekiyama <tomoki.sekiyama@hds.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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Fabian Frederick
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d7c0847fe3 |
kernel/panic.c: display reason at end + pr_emerg
Currently, booting without initrd specified on 80x25 screen gives a call
trace followed by atkbd : Spurious ACK. Original message ("VFS: Unable
to mount root fs") is not available. Of course this could happen in
other situations...
This patch displays panic reason after call trace which could help lot
of people even if it's not the very last line on screen.
Also, convert all panic.c printk(KERN_EMERG to pr_emerg(
[akpm@linux-foundation.org: missed a couple of pr_ conversions]
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds
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6f4c98e1c2 |
Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module updates from Rusty Russell: "Nothing major: the stricter permissions checking for sysfs broke a staging driver; fix included. Greg KH said he'd take the patch but hadn't as the merge window opened, so it's included here to avoid breaking build" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: staging: fix up speakup kobject mode Use 'E' instead of 'X' for unsigned module taint flag. VERIFY_OCTAL_PERMISSIONS: stricter checking for sysfs perms. kallsyms: fix percpu vars on x86-64 with relocation. kallsyms: generalize address range checking module: LLVMLinux: Remove unused function warning from __param_check macro Fix: module signature vs tracepoints: add new TAINT_UNSIGNED_MODULE module: remove MODULE_GENERIC_TABLE module: allow multiple calls to MODULE_DEVICE_TABLE() per module module: use pr_cont |
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Linus Torvalds
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176ab02d49 |
Merge branch 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 LTO changes from Peter Anvin: "More infrastructure work in preparation for link-time optimization (LTO). Most of these changes is to make sure symbols accessed from assembly code are properly marked as visible so the linker doesn't remove them. My understanding is that the changes to support LTO are still not upstream in binutils, but are on the way there. This patchset should conclude the x86-specific changes, and remaining patches to actually enable LTO will be fed through the Kbuild tree (other than keeping up with changes to the x86 code base, of course), although not necessarily in this merge window" * 'x86-asmlinkage-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits) Kbuild, lto: Handle basic LTO in modpost Kbuild, lto: Disable LTO for asm-offsets.c Kbuild, lto: Add a gcc-ld script to let run gcc as ld Kbuild, lto: add ld-version and ld-ifversion macros Kbuild, lto: Drop .number postfixes in modpost Kbuild, lto, workaround: Don't warn for initcall_reference in modpost lto: Disable LTO for sys_ni lto: Handle LTO common symbols in module loader lto, workaround: Add workaround for initcall reordering lto: Make asmlinkage __visible x86, lto: Disable LTO for the x86 VDSO initconst, x86: Fix initconst mistake in ts5500 code initconst: Fix initconst mistake in dcdbas asmlinkage: Make trace_hardirqs_on/off_caller visible asmlinkage, x86: Fix 32bit memcpy for LTO asmlinkage Make __stack_chk_failed and memcmp visible asmlinkage: Mark rwsem functions that can be called from assembler asmlinkage asmlinkage: Make main_extable_sort_needed visible asmlinkage, mutex: Mark __visible asmlinkage: Make trace_hardirq visible ... |
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Rusty Russell
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57673c2b0b |
Use 'E' instead of 'X' for unsigned module taint flag.
Takashi Iwai <tiwai@suse.de> says: > The letter 'X' has been already used for SUSE kernels for very long > time, to indicate the external supported modules. Can the new flag be > changed to another letter for avoiding conflict...? > (BTW, we also use 'N' for "no support", too.) Note: this code should be cleaned up, so we don't have such maps in three places! Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> |
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Dave Jones
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8c90487cdc |
Rename TAINT_UNSAFE_SMP to TAINT_CPU_OUT_OF_SPEC
Rename TAINT_UNSAFE_SMP to TAINT_CPU_OUT_OF_SPEC, so we can repurpose the flag to encompass a wider range of pushing the CPU beyond its warrany. Signed-off-by: Dave Jones <davej@fedoraproject.org> Link: http://lkml.kernel.org/r/20140226154949.GA770@redhat.com Signed-off-by: H. Peter Anvin <hpa@zytor.com> |
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Mathieu Desnoyers
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66cc69e34e |
Fix: module signature vs tracepoints: add new TAINT_UNSIGNED_MODULE
Users have reported being unable to trace non-signed modules loaded within a kernel supporting module signature. This is caused by tracepoint.c:tracepoint_module_coming() refusing to take into account tracepoints sitting within force-loaded modules (TAINT_FORCED_MODULE). The reason for this check, in the first place, is that a force-loaded module may have a struct module incompatible with the layout expected by the kernel, and can thus cause a kernel crash upon forced load of that module on a kernel with CONFIG_TRACEPOINTS=y. Tracepoints, however, specifically accept TAINT_OOT_MODULE and TAINT_CRAP, since those modules do not lead to the "very likely system crash" issue cited above for force-loaded modules. With kernels having CONFIG_MODULE_SIG=y (signed modules), a non-signed module is tainted re-using the TAINT_FORCED_MODULE taint flag. Unfortunately, this means that Tracepoints treat that module as a force-loaded module, and thus silently refuse to consider any tracepoint within this module. Since an unsigned module does not fit within the "very likely system crash" category of tainting, add a new TAINT_UNSIGNED_MODULE taint flag to specifically address this taint behavior, and accept those modules within Tracepoints. We use the letter 'X' as a taint flag character for a module being loaded that doesn't know how to sign its name (proposed by Steven Rostedt). Also add the missing 'O' entry to trace event show_module_flags() list for the sake of completeness. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> NAKed-by: Ingo Molnar <mingo@redhat.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: David Howells <dhowells@redhat.com> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> |
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Andi Kleen
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a7330c997d |
asmlinkage Make __stack_chk_failed and memcmp visible
In LTO symbols implicitely referenced by the compiler need to be visible. Earlier these symbols were visible implicitely from being exported, but we disabled implicit visibility fo EXPORTs when modules are disabled to improve code size. So now these symbols have to be marked visible explicitely. Do this for __stack_chk_fail (with stack protector) and memcmp. Signed-off-by: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1391845930-28580-10-git-send-email-ak@linux.intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> |
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Jason Baron
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5800dc3cff |
panic: Make panic_timeout configurable
The panic_timeout value can be set via the command line option 'panic=x', or via /proc/sys/kernel/panic, however that is not sufficient when the panic occurs before we are able to set up these values. Thus, add a CONFIG_PANIC_TIMEOUT so that we can set the desired value from the .config. The default panic_timeout value continues to be 0 - wait forever. Also adds set_arch_panic_timeout(new_timeout, arch_default_timeout), which is intended to be used by arches in arch_setup(). The idea being that the new_timeout is only set if the user hasn't changed from the arch_default_timeout. Signed-off-by: Jason Baron <jbaron@akamai.com> Cc: benh@kernel.crashing.org Cc: paulus@samba.org Cc: ralf@linux-mips.org Cc: mpe@ellerman.id.au Cc: felipe.contreras@gmail.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1a1674daec27c534df409697025ac568ebcee91e.1385418410.git.jbaron@akamai.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |