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linux/kernel
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Tetsuo Handa 34f841a3c3 PM / hibernate: Fix oops at snapshot_write() 
commit fc14eebfc2 upstream.

syzbot is reporting NULL pointer dereference at snapshot_write() [1].
This is because data->handle is zero-cleared by ioctl(SNAPSHOT_FREE).
Fix this by checking data_of(data->handle) != NULL before using it.

[1] https://syzkaller.appspot.com/bug?id=828a3c71bd344a6de8b6a31233d51a72099f27fd

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+ae590932da6e45d6564d@syzkaller.appspotmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-17 11:37:54 +02:00
..
bpf
bpf: map_get_next_key to return first key on NULL
2018-05-09 09:50:19 +02:00
configs
config: android: enable CONFIG_SECCOMP
2016-10-11 15:06:32 -07:00
debug
kdb: make "mdr" command repeat
2018-05-30 07:50:51 +02:00
events
perf/core: Fix perf_output_read_group()
2018-05-30 07:50:46 +02:00
gcov
gcov: support GCC 7.1
2017-09-02 07:07:53 +02:00
irq
genirq: Use cpumask_available() for check of cpumask variable
2018-04-08 12:12:44 +02:00
livepatch
livepatch/module: make TAINT_LIVEPATCH module-specific
2016-08-26 14:42:08 +02:00
locking
locking/qspinlock: Ensure node->count is updated before initialising node
2018-05-30 07:50:26 +02:00
power
PM / hibernate: Fix oops at snapshot_write()
2018-07-17 11:37:54 +02:00
printk
printk: fix possible reuse of va_list variable
2018-07-03 11:23:10 +02:00
rcu
rcu: Call touch_nmi_watchdog() while printing stall warnings
2018-05-30 07:50:50 +02:00
sched
sched/rt: Fix rq->clock_update_flags < RQCF_ACT_SKIP warning
2018-05-30 07:50:41 +02:00
time
time: Make sure jiffies_to_msecs() preserves non-zero time periods
2018-07-03 11:23:11 +02:00
trace
tracing: Fix missing return symbol in function_graph output
2018-07-11 16:26:43 +02:00
.gitignore
…
acct.c
kernel/acct.c: fix the acct->needcheck check in check_free_space()
2018-01-10 09:29:51 +01:00
async.c
kernel/async.c: revert "async: simplify lowest_in_progress()"
2018-02-17 13:21:18 +01:00
audit_fsnotify.c
…
audit_tree.c
audit: cleanup prune_tree_thread
2016-04-04 09:46:47 -04:00
audit_watch.c
audit: Fix use after free in audit_remove_watch_rule()
2017-08-24 17:12:18 -07:00
audit.c
audit: return on memory error to avoid null pointer dereference
2018-05-30 07:50:49 +02:00
audit.h
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
2016-07-29 17:54:17 -07:00
auditfilter.c
audit: add fields to exclude filter by reusing user filter
2016-06-27 11:01:00 -04:00
auditsc.c
Merge branch 'stable-4.9' of git://git.infradead.org/users/pcmoore/audit
2016-10-04 14:21:41 -07:00
backtracetest.c
…
bounds.c
…
capability.c
ptrace: Capture the ptracer's creds not PT_PTRACE_CAP
2017-01-06 10:40:13 +01:00
cgroup_freezer.c
…
cgroup_pids.c
cgroup/pids: remove spurious suspicious RCU usage warning
2017-03-26 13:05:58 +02:00
cgroup.c
cgroup: fix error return value from cgroup_subtree_control()
2017-08-11 08:49:28 -07:00
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpuhotplug: Link lock stacks for hotplug callbacks
2018-04-13 19:48:07 +02:00
cpuset.c
sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs
2017-10-12 11:51:25 +02:00
crash_dump.c
…
cred.c
cred: Reject inodes with invalid ids in set_create_file_as()
2016-06-30 18:05:09 -05:00
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
kernel/exit.c: avoid undefined behaviour when calling wait4()
2018-05-19 10:27:01 +02:00
extable.c
kernel/extable.c: mark core_kernel_text notrace
2017-07-21 07:42:21 +02:00
fork.c
kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE
2018-01-05 15:46:32 +01:00
freezer.c
freezer, oom: check TIF_MEMDIE on the correct task
2016-07-28 16:07:41 -07:00
futex_compat.c
…
futex.c
futex: futex_wake_op, fix sign_extend32 sign bits
2018-05-19 10:27:00 +02:00
groups.c
kernel: make groups_sort calling a responsibility group_info allocators
2018-01-10 09:29:52 +01:00
hung_task.c
hung_task: allow hung_task_panic when hung_task_warnings is 0
2016-10-11 15:06:33 -07:00
irq_work.c
…
jump_label.c
jump_label: Invoke jump_label_test() via early_initcall()
2017-12-14 09:28:24 +01:00
kallsyms.c
kallsyms: add support for relative offsets in kallsyms address table
2016-03-15 16:55:16 -07:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: detect double association with a single task
2018-02-25 11:05:42 +01:00
kexec_core.c
objtool, x86: Add several functions and files to the objtool whitelist
2018-06-05 10:28:57 +02:00
kexec_file.c
kexec: fix double-free when failing to relocate the purgatory
2016-09-01 17:52:01 -07:00
kexec_internal.h
…
kexec.c
kexec: allow architectures to override boot mapping
2016-08-02 19:35:27 -04:00
kmod.c
…
kprobes.c
kprobes/x86: Fix to set RWX bits correctly before releasing trampoline
2018-04-08 12:12:43 +02:00
ksysfs.c
kexec: add a kexec_crash_loaded() function
2016-08-02 19:35:30 -04:00
kthread.c
cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups
2017-04-21 09:31:18 +02:00
latencytop.c
…
Makefile
kernel/watchdog.c: move hardlockup detector to separate file
2017-06-17 06:41:57 +02:00
membarrier.c
Fix: Disable sys_membarrier when nohz_full is enabled
2017-03-12 06:41:45 +01:00
memremap.c
mm: Fix devm_memremap_pages() collision handling
2018-02-28 10:18:34 +01:00
module_signing.c
KEYS: Move the point of trust determination to __key_link()
2016-04-11 22:43:43 +01:00
module-internal.h
…
module.c
module: extend 'rodata=off' boot cmdline parameter to module mappings
2018-04-08 12:12:52 +02:00
notifier.c
…
nsproxy.c
cgroup: introduce cgroup namespaces
2016-02-16 13:04:58 -05:00
padata.c
padata: free correct variable
2017-05-20 14:28:40 +02:00
panic.c
kernel/panic.c: add missing \n
2017-07-05 14:40:24 +02:00
params.c
…
pid_namespace.c
pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes
2017-05-25 15:44:38 +02:00
pid.c
pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()
2018-04-13 19:47:53 +02:00
profile.c
profile: Convert to hotplug state machine
2016-07-15 10:41:42 +02:00
ptrace.c
ptrace: Properly initialize ptracer_cred on fork
2017-06-14 15:05:54 +02:00
range.c
…
reboot.c
…
relay.c
kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE
2018-05-30 07:50:29 +02:00
resource.c
resource: fix integer overflow at reallocation
2018-04-24 09:34:09 +02:00
seccomp.c
seccomp: Move speculation migitation control to arch code
2018-05-22 16:58:02 +02:00
signal.c
kernel/signal.c: avoid undefined behaviour in kill_something_info
2018-05-30 07:50:18 +02:00
smp.c
smp: Allocate smp_call_on_cpu() workqueue on stack too
2016-09-22 14:49:10 +02:00
smpboot.c
kthread/smpboot: do not park in kthread_create_on_cpu()
2016-10-11 15:06:33 -07:00
smpboot.h
cpu/hotplug: Create hotplug threads
2016-03-01 20:36:56 +01:00
softirq.c
softirq: Display IRQ_POLL for irq-poll statistics
2016-10-21 15:45:47 -06:00
stacktrace.c
stacktrace, lockdep: Fix address, newline ugliness
2017-02-14 15:25:42 -08:00
stop_machine.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-10-03 13:39:00 -07:00
sys_ni.c
x86/pkeys: Fix pkeys build breakage for some non-x86 arches
2016-09-13 14:41:36 +02:00
sys.c
kernel/sys.c: fix potential Spectre v1 issue
2018-05-30 07:50:18 +02:00
sysctl_binary.c
kernel/sysctl_binary.c: use generic UUID library
2016-05-20 17:58:30 -07:00
sysctl.c
timer/sysclt: Restrict timer migration sysctl values to 0 and 1
2017-10-05 09:44:04 +02:00
task_work.c
task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works
2016-08-02 19:35:02 -04:00
taskstats.c
taskstats: fix the length of cgroupstats_cmd_get_policy
2016-11-03 16:55:58 -04:00
test_kprobes.c
…
torture.c
torture: Convert torture_shutdown() to hrtimer
2016-08-22 10:01:49 -07:00
tracepoint.c
tracepoint: Do not warn on ENOMEM
2018-05-09 09:50:20 +02:00
tsacct.c
time, acct: Drop irq save & restore from __acct_update_integrals()
2016-02-29 09:53:09 +01:00
ucount.c
kernel/ucount.c: mark user_header with kmemleak_ignore()
2017-06-17 06:41:51 +02:00
uid16.c
kernel: make groups_sort calling a responsibility group_info allocators
2018-01-10 09:29:52 +01:00
up.c
smp: Add function to execute a function synchronously on a CPU
2016-09-05 13:52:39 +02:00
user_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
watchdog_hld.c
kernel/watchdog: prevent false hardlockup on overloaded system
2017-06-17 06:41:57 +02:00
watchdog.c
kernel/watchdog: prevent false hardlockup on overloaded system
2017-06-17 06:41:57 +02:00
workqueue_internal.h
workqueue: Fix NULL pointer dereference
2017-11-15 15:53:17 +01:00
workqueue.c
workqueue: use put_device() instead of kfree()
2018-05-30 07:50:36 +02:00