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f69aecb49968e14196366bbe896eab0a904229f5
linux/kernel
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David Howells f69aecb499 watch_queue: Actually free the watch 
[ Upstream commit 3d8dcf278b ]

free_watch() does everything barring actually freeing the watch object.  Fix
this by adding the missing kfree.

kmemleak produces a report something like the following.  Note that as an
address can be seen in the first word, the watch would appear to have gone
through call_rcu().

BUG: memory leak
unreferenced object 0xffff88810ce4a200 (size 96):
  comm "syz-executor352", pid 3605, jiffies 4294947473 (age 13.720s)
  hex dump (first 32 bytes):
    e0 82 48 0d 81 88 ff ff 00 00 00 00 00 00 00 00  ..H.............
    80 a2 e4 0c 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8214e6cc>] kmalloc include/linux/slab.h:581 [inline]
    [<ffffffff8214e6cc>] kzalloc include/linux/slab.h:714 [inline]
    [<ffffffff8214e6cc>] keyctl_watch_key+0xec/0x2e0 security/keys/keyctl.c:1800
    [<ffffffff8214ec84>] __do_sys_keyctl+0x3c4/0x490 security/keys/keyctl.c:2016
    [<ffffffff84493a25>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84493a25>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: c73be61ced ("pipe: Add general notification queue support")
Reported-and-tested-by: syzbot+6e2de48f06cdb2884bfc@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-08 14:23:10 +02:00
..
bpf
bpf: Fix possible race in inc_misses_counter
2022-03-08 19:12:40 +01:00
cgroup
cgroup-v1: Correct privileges check in release_agent writes
2022-03-02 11:47:47 +01:00
configs
drivers/char: remove /dev/kmem for good
2021-05-07 00:26:34 -07:00
debug
kdb: Adopt scheduler's task classification
2021-11-18 19:17:06 +01:00
dma
Revert "swiotlb: rework "fix info leak with DMA_FROM_DEVICE""
2022-04-08 14:22:45 +02:00
entry
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-25 09:49:07 +01:00
events
perf: Fix list corruption in perf_cgroup_switch()
2022-02-16 12:56:41 +01:00
gcov
Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
2021-06-22 11:07:18 -07:00
irq
PCI/MSI: Move non-mask check back into low level accessors
2021-11-18 19:17:14 +01:00
kcsan
Merge tag 'locking-debug-2021-09-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2021-09-02 13:00:15 -07:00
livepatch
livepatch: Replace deprecated CPU-hotplug functions.
2021-08-19 12:00:24 +02:00
locking
locking/lockdep: Avoid potential access of invalid memory in lock_class
2022-04-08 14:22:48 +02:00
power
PM: suspend: fix return value of __setup handler
2022-04-08 14:23:07 +02:00
printk
printk: restore flushing of NMI buffers on remote CPUs after NMI backtraces
2021-11-25 09:48:45 +01:00
rcu
rcu: Don't deboost before reporting expedited quiescent state
2022-03-28 09:58:45 +02:00
sched
sched: Fix yet more sched_fork() races
2022-03-08 19:12:49 +01:00
time
clocksource: Avoid accidental unstable marking of clocksources
2022-01-27 11:04:08 +01:00
trace
tracing: Have trace event string test handle zero length strings
2022-04-08 14:22:57 +02:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
acct.c
kernel/acct.c: use dedicated helper to access rlimit values
2021-09-08 11:50:26 -07:00
async.c
Revert "module, async: async_synchronize_full() on module init iff async is used"
2022-02-23 12:03:07 +01:00
audit_fsnotify.c
audit_alloc_mark(): don't open-code ERR_CAST()
2021-02-23 10:25:27 -05:00
audit_tree.c
audit: move put_tree() to avoid trim_trees refcount underflow and UAF
2021-08-24 18:52:36 -04:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-03 14:58:35 +01:00
audit.c
audit: improve audit queue handling when "audit=1" on cmdline
2022-02-08 18:34:03 +01:00
audit.h
audit: log AUDIT_TIME_* records only from rules
2022-04-08 14:23:06 +02:00
auditfilter.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
auditsc.c
audit: log AUDIT_TIME_* records only from rules
2022-04-08 14:23:06 +02:00
backtracetest.c
…
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
cfi.c
cfi: Use rcu_read_{un}lock_sched_notrace
2021-08-11 13:11:12 -07:00
compat.c
arch: remove compat_alloc_user_space
2021-09-08 15:32:35 -07:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-08-16 18:55:32 +02:00
cpu.c
sched/scs: Reset task stack state in bringup_cpu()
2021-12-01 09:04:54 +01:00
crash_core.c
kernel/crash_core: suppress unknown crashkernel parameter warning
2021-12-29 12:28:49 +01:00
crash_dump.c
…
cred.c
ucounts: Base set_cred_ucounts changes on the real user
2022-02-23 12:03:20 +01:00
delayacct.c
delayacct: Add sysctl to enable at runtime
2021-05-12 11:43:25 +02:00
dma.c
…
exec_domain.c
…
exit.c
io_uring: remove files pointer in cancellation functions
2021-08-23 13:10:37 -06:00
extable.c
…
fail_function.c
fault-injection: handle EI_ETYPE_TRUE
2020-12-15 22:46:19 -08:00
fork.c
sched: Fix yet more sched_fork() races
2022-03-08 19:12:49 +01:00
freezer.c
sched: Add get_current_state()
2021-06-18 11:43:08 +02:00
futex.c
futex: Remove unused variable 'vpid' in futex_proxy_trylock_atomic()
2021-09-03 23:00:22 +02:00
gen_kheaders.sh
kbuild: clean up ${quiet} checks in shell scripts
2021-05-27 04:01:50 +09:00
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
iomem.c
…
irq_work.c
irq_work: Make irq_work_queue() NMI-safe again
2021-06-10 10:00:08 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-05 10:46:20 +02:00
kallsyms.c
module: add printk formats to add module build ID to stacktraces
2021-07-08 11:48:22 -07:00
kcmp.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/rwlock: Provide RT variant
2021-08-17 17:50:51 +02:00
Kconfig.preempt
sched/core: Disable CONFIG_SCHED_CORE by default
2021-06-28 22:43:05 +02:00
kcov.c
kernel: make kcov_common_handle consider the current context
2020-11-02 18:00:20 -08:00
kexec_core.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
kexec_elf.c
…
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-07 00:26:32 -07:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
kexec: avoid compat_alloc_user_space
2021-09-08 15:32:34 -07:00
kheaders.c
…
kmod.c
modules: add CONFIG_MODPROBE_PATH
2021-05-07 00:26:33 -07:00
kprobes.c
kprobes: Limit max data_size of the kretprobe instances
2021-12-08 09:04:41 +01:00
ksysfs.c
…
kthread.c
Merge branch 'akpm' (patches from Andrew)
2021-06-29 17:29:11 -07:00
latencytop.c
…
Makefile
kbuild: update config_data.gz only when the content of .config is changed
2021-05-02 00:43:35 +09:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
…
module.c
Revert "module, async: async_synchronize_full() on module init iff async is used"
2022-02-23 12:03:07 +01:00
notifier.c
notifier: Remove atomic_notifier_call_chain_robust()
2021-08-16 18:55:32 +02:00
nsproxy.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
padata.c
padata: Remove repeated verbose license text
2021-08-27 16:30:18 +08:00
panic.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
params.c
params: lift param_set_uint_minmax to common code
2021-08-16 14:42:22 +02:00
pid_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
pid.c
kernel/pid.c: implement additional checks upon pidfd_create() parameters
2021-08-10 12:53:07 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-08 11:50:26 -07:00
ptrace.c
ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE
2022-04-08 14:22:50 +02:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
reboot: Add hardware protection power-off
2021-06-21 13:08:36 +01:00
regset.c
…
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
kernel/resource: fix return code check in __request_free_mem_region
2021-05-14 19:41:32 -07:00
rseq.c
KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest
2021-09-22 10:24:01 -04:00
scftorture.c
scftorture: Avoid NULL pointer exception on early exit
2021-07-27 11:39:30 -07:00
scs.c
scs: Release kasan vmalloc poison in scs_free process
2021-11-18 19:16:29 +01:00
seccomp.c
seccomp: Invalidate seccomp mode to catch death failures
2022-02-16 12:56:38 +01:00
signal.c
signal: In get_signal test for signal_group_exit every time through the loop
2022-03-08 19:12:34 +01:00
smp.c
smp: Fix all kernel-doc warnings
2021-08-11 14:47:16 +02:00
smpboot.c
smpboot: Replace deprecated CPU-hotplug functions.
2021-08-10 14:57:42 +02:00
smpboot.h
…
softirq.c
genirq: Change force_irqthreads to a static key
2021-08-10 22:50:07 +02:00
stackleak.c
gcc-plugins/stackleak: Use noinstr in favor of notrace
2022-02-23 12:03:07 +01:00
stacktrace.c
stacktrace: Remove reliable argument from arch_stack_walk() callback
2020-09-18 14:24:16 +01:00
static_call.c
static_call: Fix static_call_text_reserved() vs __init
2021-07-05 10:46:33 +02:00
stop_machine.c
stop_machine: Add caller debug info to queue_stop_cpus_work
2021-03-23 16:01:58 +01:00
sys_ni.c
compat: remove some compat entry points
2021-09-08 15:32:35 -07:00
sys.c
ucounts: Move RLIMIT_NPROC handling after set_user
2022-02-23 12:03:20 +01:00
sysctl-test.c
kernel/sysctl-test: Remove some casts which are no-longer required
2021-06-23 16:41:24 -06:00
sysctl.c
x86/speculation: Include unprivileged eBPF status in Spectre v2 mitigation reporting
2022-03-11 12:22:31 +01:00
task_work.c
kasan: record task_work_add() call stack
2021-04-30 11:20:42 -07:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
test_kprobes.c
…
torture.c
torture: Replace deprecated CPU-hotplug functions.
2021-08-10 10:48:07 -07:00
tracepoint.c
tracepoint: Fix kerneldoc comments
2021-08-16 11:39:51 -04:00
tsacct.c
taskstats: Cleanup the use of task->exit_code
2022-01-27 11:05:35 +01:00
ucount.c
ucounts: Handle wrapping in is_ucounts_overlimit
2022-02-23 12:03:20 +01:00
uid16.c
…
uid16.h
…
umh.c
kernel/umh.c: fix some spelling mistakes
2021-05-07 00:26:34 -07:00
up.c
Merge tag 'locking-urgent-2021-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2021-05-09 13:07:03 -07:00
user_namespace.c
ucounts: Fix systemd LimitNPROC with private users regression
2022-03-08 19:12:42 +01:00
user-return-notifier.c
…
user.c
fs/epoll: use a per-cpu counter for user's watches count
2021-09-08 11:50:27 -07:00
usermode_driver.c
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-07-03 11:41:14 -07:00
utsname_sysctl.c
…
utsname.c
uts: Use generic ns_common::count
2020-08-19 14:13:20 +02:00
watch_queue.c
watch_queue: Actually free the watch
2022-04-08 14:23:10 +02:00
watchdog_hld.c
…
watchdog.c
kernel: watchdog: modify the explanation related to watchdog thread
2021-06-29 10:53:46 -07:00
workqueue_internal.h
workqueue: Assign a color to barrier work items
2021-08-17 07:49:10 -10:00
workqueue.c
workqueue: Fix unbind_workers() VS wq_worker_running() race
2022-01-16 09:12:41 +01:00