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Ye Bin e245b6ccaa PM: hibernate: Get block device exclusively in swsusp_check() 
[ Upstream commit 39fbef4b0f77f9c89c8f014749ca533643a37c9f ]

The following kernel crash can be triggered:

[   89.266592] ------------[ cut here ]------------
[   89.267427] kernel BUG at fs/buffer.c:3020!
[   89.268264] invalid opcode: 0000 [#1] SMP KASAN PTI
[   89.269116] CPU: 7 PID: 1750 Comm: kmmpd-loop0 Not tainted 5.10.0-862.14.0.6.x86_64-08610-gc932cda3cef4-dirty #20
[   89.273169] RIP: 0010:submit_bh_wbc.isra.0+0x538/0x6d0
[   89.277157] RSP: 0018:ffff888105ddfd08 EFLAGS: 00010246
[   89.278093] RAX: 0000000000000005 RBX: ffff888124231498 RCX: ffffffffb2772612
[   89.279332] RDX: 1ffff11024846293 RSI: 0000000000000008 RDI: ffff888124231498
[   89.280591] RBP: ffff8881248cc000 R08: 0000000000000001 R09: ffffed1024846294
[   89.281851] R10: ffff88812423149f R11: ffffed1024846293 R12: 0000000000003800
[   89.283095] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881161f7000
[   89.284342] FS:  0000000000000000(0000) GS:ffff88839b5c0000(0000) knlGS:0000000000000000
[   89.285711] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   89.286701] CR2: 00007f166ebc01a0 CR3: 0000000435c0e000 CR4: 00000000000006e0
[   89.287919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   89.289138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   89.290368] Call Trace:
[   89.290842]  write_mmp_block+0x2ca/0x510
[   89.292218]  kmmpd+0x433/0x9a0
[   89.294902]  kthread+0x2dd/0x3e0
[   89.296268]  ret_from_fork+0x22/0x30
[   89.296906] Modules linked in:

by running the following commands:

 1. mkfs.ext4 -O mmp  /dev/sda -b 1024
 2. mount /dev/sda /home/test
 3. echo "/dev/sda" > /sys/power/resume

That happens because swsusp_check() calls set_blocksize() on the
target partition which confuses the file system:

       Thread1                       Thread2
mount /dev/sda /home/test
get s_mmp_bh  --> has mapped flag
start kmmpd thread
				echo "/dev/sda" > /sys/power/resume
				  resume_store
				    software_resume
				      swsusp_check
				        set_blocksize
					  truncate_inode_pages_range
					    truncate_cleanup_page
					      block_invalidatepage
					        discard_buffer --> clean mapped flag
write_mmp_block
  submit_bh
    submit_bh_wbc
      BUG_ON(!buffer_mapped(bh))

To address this issue, modify swsusp_check() to open the target block
device with exclusive access.

Signed-off-by: Ye Bin <yebin10@huawei.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-26 11:58:38 +01:00
..
bpf
bpf: fix map not being uncharged during map creation failure
2020-05-10 10:26:19 +02:00
configs
kconfig: tinyconfig: provide whole choice blocks to avoid warnings
2016-09-24 10:07:42 +02:00
debug
kdb: Make memory allocations more robust
2021-03-03 16:44:15 +01:00
events
perf: Fix data race between pin_count increment/decrement
2021-06-16 11:34:53 +02:00
gcov
gcov: add support for GCC 10.1
2020-09-23 08:44:26 +02:00
irq
genirq: Disable interrupts for force threaded handlers
2021-03-24 10:57:01 +01:00
livepatch
livepatch: x86: fix relocation computation with kASLR
2015-11-11 17:36:04 +01:00
locking
futex,rt_mutex: Fix rt_mutex_cleanup_proxy_lock()
2021-08-10 17:39:42 +02:00
power
PM: hibernate: Get block device exclusively in swsusp_check()
2021-11-26 11:58:38 +01:00
printk
printk/console: Allow to disable console output by using console="" or console=null
2021-11-12 13:17:07 +01:00
rcu
rcutorture: Fix cleanup path for invalid torture_type strings
2019-06-11 12:24:04 +02:00
sched
sched/fair: Fix CFS bandwidth hrtimer expiry type
2021-07-28 09:12:34 +02:00
time
random32: make prandom_u32() output unpredictable
2020-11-18 18:25:02 +01:00
trace
tracing: Have all levels of checks prevent recursion
2021-10-27 09:32:40 +02:00
.gitignore
certs: add .gitignore to stop git nagging about x509_certificate_list
2015-10-21 15:18:35 +01:00
acct.c
kernel/acct.c: fix the acct->needcheck check in check_free_space()
2018-01-10 09:27:08 +01:00
async.c
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-16 20:09:45 +01:00
audit_fsnotify.c
audit: clean simple fsnotify implementation
2015-08-06 16:14:53 -04:00
audit_tree.c
audit: audit_tree_match can be boolean
2015-11-04 08:23:51 -05:00
audit_watch.c
audit: CONFIG_CHANGE don't log internal bookkeeping as an event
2020-10-01 11:11:52 +02:00
audit.c
audit: check the length of userspace generated audit records
2020-05-02 17:20:48 +02:00
audit.h
audit: audit_tree_match can be boolean
2015-11-04 08:23:51 -05:00
auditfilter.c
audit: fix error handling in audit_data_to_entry()
2020-03-11 07:51:13 +01:00
auditsc.c
audit: print empty EXECVE args
2019-11-28 18:26:01 +01:00
backtracetest.c
…
bounds.c
kbuild: fix kernel/bounds.c 'W=1' warning
2018-11-21 09:27:35 +01:00
capability.c
exec: Ensure mm->user_ns contains the execed files
2017-01-06 11:16:14 +01:00
cgroup_freezer.c
cgroup: fix handling of multi-destination migration from subtree_control enabling
2015-12-03 10:18:21 -05:00
cgroup_pids.c
cgroup: pids: use atomic64_t for pids->limit
2019-12-21 10:35:24 +01:00
cgroup.c
cgroup1: don't allow '\n' in renaming
2021-06-16 11:34:53 +02:00
compat.c
compat: cleanup coding in compat_get_bitmap() and compat_put_bitmap()
2015-06-04 23:57:18 +02:00
configs.c
…
context_tracking.c
context_tracking: avoid irq_save/irq_restore on guest entry and exit
2015-11-10 12:06:23 +01:00
cpu_pm.c
kernel/cpu_pm: Fix uninitted local in cpu_pm
2020-06-20 10:23:24 +02:00
cpu.c
cpu/speculation: Warn on unsupported mitigations= parameter
2019-07-10 09:56:36 +02:00
cpuset.c
sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
2017-10-12 11:27:35 +02:00
crash_dump.c
…
cred.c
access: avoid the RCU grace period for the temporary subjective credentials
2019-08-04 09:35:01 +02:00
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
futex: Mark the begin of futex exit explicitly
2021-02-03 23:16:16 +01:00
extable.c
kernel/extable.c: mark core_kernel_text notrace
2017-07-21 07:44:56 +02:00
fork.c
futex: Split futex_mm_release() for exit/exec
2021-02-03 23:16:16 +01:00
freezer.c
…
futex.c
futex: Avoid freeing an active timer
2021-08-10 17:39:42 +02:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2018-01-10 09:27:10 +01:00
hung_task.c
kernel/hung_task.c: break RCU locks based on jiffies
2019-02-20 10:13:14 +01:00
irq_work.c
treewide: Remove old email address
2015-11-23 09:44:58 +01:00
jump_label.c
jump_label: Invoke jump_label_test() via early_initcall()
2017-12-16 10:33:55 +01:00
kallsyms.c
…
kcmp.c
ptrace: use fsuid, fsgid, effective creds for fs access checks
2016-02-25 12:01:16 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kexec_core.c
kexec: use file name as the output message prefix
2015-11-06 17:50:42 -08:00
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-22 10:38:28 +02:00
kexec_internal.h
kexec: split kexec_file syscall code to kexec_file.c
2015-09-10 13:29:01 -07:00
kexec.c
kexec: use file name as the output message prefix
2015-11-06 17:50:42 -08:00
kmod.c
usermodehelper: reset umask to default before executing user process
2020-10-14 09:46:22 +02:00
kprobes.c
kretprobe: Avoid re-registration of the same kretprobe earlier
2021-02-10 09:07:27 +01:00
ksysfs.c
kexec: split kexec_load syscall from kexec core code
2015-09-10 13:29:01 -07:00
kthread.c
kthread, tracing: Don't expose half-written comm when creating kthreads
2018-09-09 20:04:34 +02:00
latencytop.c
…
Makefile
elfcore: fix building with clang
2021-02-10 09:07:27 +01:00
membarrier.c
Fix: Disable sys_membarrier when nohz_full is enabled
2017-03-12 06:37:26 +01:00
memremap.c
mm, devm_memremap_pages: kill mapping "System RAM" support
2019-01-13 10:05:32 +01:00
module_signing.c
KEYS: Merge the type-specific data with the payload data
2015-10-21 15:18:36 +01:00
module-internal.h
…
module.c
module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
2021-03-03 16:44:23 +01:00
notifier.c
x86/mm: split vmalloc_sync_all()
2020-04-02 19:02:31 +02:00
nsproxy.c
…
padata.c
padata: purge get_cpu and reorder_via_wq from padata_do_serial
2020-05-27 16:40:27 +02:00
panic.c
panic: ensure preemption is disabled during panic()
2019-10-17 13:40:58 -07:00
params.c
Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
2015-11-09 15:53:39 -08:00
pid_namespace.c
signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig
2019-08-04 09:34:42 +02:00
pid.c
pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()
2018-04-13 19:50:03 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-26 13:33:46 +02:00
ptrace.c
ptrace: make ptrace() fail if the tracee changed its pid unexpectedly
2021-05-26 11:27:32 +02:00
range.c
…
reboot.c
reboot: fix overflow parsing reboot cpu number
2020-11-18 18:25:04 +01:00
relay.c
kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE
2018-05-30 07:49:00 +02:00
resource.c
resource: fix integer overflow at reallocation
2018-04-24 09:32:05 +02:00
seccomp.c
seccomp: Move speculation migitation control to arch code
2018-07-25 10:18:27 +02:00
signal.c
signal: Remove the bogus sigkill_pending in ptrace_stop
2021-11-26 11:58:36 +01:00
smp.c
mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd
2015-11-06 17:50:42 -08:00
smpboot.c
stop_machine: Kill smp_hotplug_thread->pre_unpark, introduce stop_machine_unpark()
2015-10-20 10:23:55 +02:00
smpboot.h
…
softirq.c
…
stacktrace.c
…
stop_machine.c
kernel: remove stop_machine() Kconfig dependency
2015-12-12 10:15:34 -08:00
sys_ni.c
mm: mlock: add new mlock system call
2015-11-05 19:34:48 -08:00
sys.c
prctl: allow to setup brk for et_dyn executables
2021-09-26 13:33:46 +02:00
sysctl_binary.c
fs/coredump: prevent fsuid=0 dumps into user-controlled directories
2016-04-12 09:08:58 -07:00
sysctl.c
sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds
2020-07-09 09:35:08 +02:00
task_work.c
task_work: remove fifo ordering guarantee
2015-09-05 13:46:58 -07:00
taskstats.c
taskstats: fix data-race
2020-01-12 11:22:40 +01:00
test_kprobes.c
…
torture.c
torture: Consolidate cond_resched_rcu_qs() into stutter_wait()
2015-10-06 11:25:01 -07:00
tracepoint.c
tracepoint: Do not fail unregistering a probe due to memory failure
2021-03-03 16:44:19 +01:00
tsacct.c
…
uid16.c
kernel: make groups_sort calling a responsibility group_info allocators
2018-01-10 09:27:10 +01:00
up.c
…
user_namespace.c
userns: move user access out of the mutex
2018-09-09 20:04:35 +02:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
sys: don't hold uts_sem while accessing userspace memory
2018-09-09 20:04:35 +02:00
utsname.c
…
watchdog.c
kernel/watchdog: use nmi registers snapshot in hardlockup handler
2017-01-06 11:16:16 +01:00
workqueue_internal.h
workqueue: Fix NULL pointer dereference
2017-11-15 17:13:11 +01:00
workqueue.c
workqueue: fix UAF in pwq_unbound_release_workfn()
2021-08-04 11:56:44 +02:00