OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity
acrn-kernel/kernel
History
Gaosheng Cui 9ca08adb75 audit: fix possible soft lockup in __audit_inode_child() 
[ Upstream commit b59bc6e372 ]

Tracefs or debugfs maybe cause hundreds to thousands of PATH records,
too many PATH records maybe cause soft lockup.

For example:
  1. CONFIG_KASAN=y && CONFIG_PREEMPTION=n
  2. auditctl -a exit,always -S open -k key
  3. sysctl -w kernel.watchdog_thresh=5
  4. mkdir /sys/kernel/debug/tracing/instances/test

There may be a soft lockup as follows:
  watchdog: BUG: soft lockup - CPU#45 stuck for 7s! [mkdir:15498]
  Kernel panic - not syncing: softlockup: hung tasks
  Call trace:
   dump_backtrace+0x0/0x30c
   show_stack+0x20/0x30
   dump_stack+0x11c/0x174
   panic+0x27c/0x494
   watchdog_timer_fn+0x2bc/0x390
   __run_hrtimer+0x148/0x4fc
   __hrtimer_run_queues+0x154/0x210
   hrtimer_interrupt+0x2c4/0x760
   arch_timer_handler_phys+0x48/0x60
   handle_percpu_devid_irq+0xe0/0x340
   __handle_domain_irq+0xbc/0x130
   gic_handle_irq+0x78/0x460
   el1_irq+0xb8/0x140
   __audit_inode_child+0x240/0x7bc
   tracefs_create_file+0x1b8/0x2a0
   trace_create_file+0x18/0x50
   event_create_dir+0x204/0x30c
   __trace_add_new_event+0xac/0x100
   event_trace_add_tracer+0xa0/0x130
   trace_array_create_dir+0x60/0x140
   trace_array_create+0x1e0/0x370
   instance_mkdir+0x90/0xd0
   tracefs_syscall_mkdir+0x68/0xa0
   vfs_mkdir+0x21c/0x34c
   do_mkdirat+0x1b4/0x1d4
   __arm64_sys_mkdirat+0x4c/0x60
   el0_svc_common.constprop.0+0xa8/0x240
   do_el0_svc+0x8c/0xc0
   el0_svc+0x20/0x30
   el0_sync_handler+0xb0/0xb4
   el0_sync+0x160/0x180

Therefore, we add cond_resched() to __audit_inode_child() to fix it.

Fixes: 5195d8e217 ("audit: dynamically allocate audit_names when not enough space is in the names array")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2023-09-13 09:42:42 +02:00
..
bpf bpf: Fix an error in verifying a field in a union 2023-09-13 09:42:30 +02:00
cgroup cgroup/cpuset: Free DL BW in case can_attach() fails 2023-08-30 16:11:11 +02:00
configs Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
debug mm: remove vmacache 2022-09-26 19:46:18 -07:00
dma dma-remap: use kvmalloc_array/kvfree for larger dma memory remap 2023-08-23 17:52:21 +02:00
entry entry/rcu: Check TIF_RESCHED _after_ delayed RCU wake-up 2023-03-30 12:49:13 +02:00
events perf: Fix function pointer case 2023-08-11 12:08:09 +02:00
futex futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error 2023-01-04 11:28:58 +01:00
gcov gcov: add support for checksum field 2022-12-31 13:33:11 +01:00
irq x86/pci/xen: populate MSI sysfs entries 2023-05-30 14:03:22 +01:00
kcsan kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures 2023-07-19 16:21:37 +02:00
livepatch Livepatching changes for 6.1 2022-10-10 11:36:19 -07:00
locking lockdep: fix static memory detection even more 2023-09-02 09:16:19 +02:00
module modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules 2023-09-06 21:27:00 +01:00
power PM: QoS: Restore support for default value on frequency QoS 2023-07-23 13:49:45 +02:00
printk kernel/printk/index.c: fix memory leak with using debugfs_lookup() 2023-03-11 13:55:32 +01:00
rcu refscale: Fix uninitalized use of wait_queue_head_t 2023-09-13 09:42:28 +02:00
sched sched/rt: Fix sysctl_sched_rr_timeslice intial value 2023-09-13 09:42:29 +02:00
time tick/rcu: Fix bogus ratelimit condition 2023-07-19 16:20:59 +02:00
trace bpf: Clear the probe_addr for uprobe 2023-09-13 09:42:30 +02:00
.gitignore
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
Makefile cfi: Fix CFI failure with KASAN 2022-12-31 13:33:08 +01:00
acct.c acct: fix potential integer overflow in encode_comp_t() 2022-12-31 13:32:58 +01:00
async.c
…
audit.c
…
audit.h audit: remove selinux_audit_rule_update() declaration 2022-09-07 11:30:15 -04:00
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
…
auditfilter.c
…
auditsc.c audit: fix possible soft lockup in __audit_inode_child() 2023-09-13 09:42:42 +02:00
backtracetest.c
…
bounds.c mm: multi-gen LRU: minimal implementation 2022-09-26 19:46:09 -07:00
capability.c
…
cfi.c cfi: Switch to -fsanitize=kcfi 2022-09-26 10:13:13 -07:00
compat.c sched_getaffinity: don't assume 'cpumask_size()' is fully initialized 2023-04-06 12:10:40 +02:00
configs.c
…
context_tracking.c context_tracking: Fix noinstr vs KASAN 2023-03-10 09:33:45 +01:00
cpu.c cpu/hotplug: Do not bail-out in DYING/STARTING sections 2022-12-31 13:31:59 +01:00
cpu_pm.c
…
crash_core.c
…
crash_dump.c
…
cred.c
…
delayacct.c delayacct: support re-entrance detection of thrashing accounting 2022-09-26 19:46:07 -07:00
dma.c
…
exec_domain.c
…
exit.c exit: Detect and fix irq disabled state in oops 2023-03-10 09:33:45 +01:00
extable.c
…
fail_function.c kernel/fail_function: fix memory leak with using debugfs_lookup() 2023-03-11 13:55:39 +01:00
fork.c mm: Move mm_cachep initialization to mm_init() 2023-08-08 20:03:49 +02:00
freezer.c freezer,sched: Rewrite core freezer logic 2022-09-07 21:53:50 +02:00
gen_kheaders.sh kbuild: build init/built-in.a just once 2022-09-29 04:40:15 +09:00
groups.c
…
hung_task.c sched: Fix more TASK_state comparisons 2022-09-30 16:50:39 +02:00
iomem.c
…
irq_work.c
…
jump_label.c
…
kallsyms.c kallsyms: Fix kallsyms_selftest failure 2023-09-02 09:16:19 +02:00
kallsyms_internal.h kallsyms: Improve the performance of kallsyms_lookup_name() 2023-07-27 08:50:39 +02:00
kcmp.c
…
kcov.c kcov: kmsan: unpoison area->list in kcov_remote_area_put() 2022-10-03 14:03:23 -07:00
kexec.c panic, kexec: make __crash_kexec() NMI safe 2022-09-11 21:55:06 -07:00
kexec_core.c kexec: fix a memory leak in crash_shrink_memory() 2023-07-19 16:21:08 +02:00
kexec_elf.c
…
kexec_file.c kexec: support purgatories with .text.hot sections 2023-06-21 16:00:55 +02:00
kexec_internal.h panic, kexec: make __crash_kexec() NMI safe 2022-09-11 21:55:06 -07:00
kheaders.c kheaders: Use array declaration instead of char 2023-05-11 23:03:02 +09:00
kmod.c
…
kprobes.c kprobes: Prohibit probing on CFI preamble symbol 2023-09-13 09:42:23 +02:00
ksysfs.c kexec: turn all kexec_mutex acquisitions into trylocks 2022-09-11 21:55:06 -07:00
kthread.c signal: break out of wait loops on kthread_stop() 2022-10-09 16:01:59 -07:00
latencytop.c latencytop: use the last element of latency_record of system 2022-09-11 21:55:12 -07:00
module_signature.c
…
notifier.c
…
nsproxy.c Revert "fs/exec: allow to unshare a time namespace on vfork+exec" 2022-09-13 10:38:43 -07:00
padata.c padata: Fix list iterator in padata_do_serial() 2022-12-31 13:32:34 +01:00
panic.c panic: fix the panic_print NMI backtrace setting 2023-03-10 09:34:25 +01:00
params.c
…
pid.c
…
pid_namespace.c rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes() 2023-03-10 09:32:52 +01:00
profile.c kernel/profile.c: simplify duplicated code in profile_setup() 2022-09-11 21:55:12 -07:00
ptrace.c freezer,sched: Rewrite core freezer logic 2022-09-07 21:53:50 +02:00
range.c
…
reboot.c kernel/reboot: Add SYS_OFF_MODE_RESTART_PREPARE mode 2022-10-04 15:59:36 +02:00
regset.c
…
relay.c relayfs: fix out-of-bounds access in relay_file_read 2023-05-11 23:03:03 +09:00
resource.c dax/kmem: Fix leak of memory-hotplug resources 2023-03-10 09:34:25 +01:00
resource_kunit.c
…
rseq.c rseq: Use pr_warn_once() when deprecated/unknown ABI flags are encountered 2022-11-14 09:58:32 +01:00
scftorture.c
…
scs.c
…
seccomp.c
…
signal.c mm: suppress mm fault logging if fatal signal already pending 2023-08-03 10:24:01 +02:00
smp.c bitmap patches for v6.1-rc1 2022-10-10 12:49:34 -07:00
smpboot.c smpboot: use atomic_try_cmpxchg in cpu_wait_death and cpu_report_death 2022-09-11 21:55:10 -07:00
smpboot.h
…
softirq.c
…
stackleak.c
…
stacktrace.c
…
static_call.c
…
static_call_inline.c
…
stop_machine.c
…
sys.c kernel/sys.c: fix and improve control flow in __sys_setres[ug]id() 2023-04-26 14:28:39 +02:00
sys_ni.c
…
sysctl-test.c kernel/sysctl-test: use SYSCTL_{ZERO/ONE_HUNDRED} instead of i_{zero/one_hundred} 2022-09-08 16:56:45 -07:00
sysctl.c proc: proc_skip_spaces() shouldn't think it is working on C strings 2022-12-05 12:09:06 -08:00
task_work.c task_work: use try_cmpxchg in task_work_add, task_work_cancel_match and task_work_run 2022-09-11 21:55:10 -07:00
taskstats.c
…
torture.c torture: Fix hang during kthread shutdown phase 2023-03-10 09:34:07 +01:00
tracepoint.c tracepoint: Optimize the critical region of mutex_lock in tracepoint_module_coming() 2022-09-26 13:01:18 -04:00
tsacct.c
…
ucount.c
…
uid16.c
…
uid16.h
…
umh.c freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL 2023-02-22 12:59:50 +01:00
up.c
…
user-return-notifier.c
…
user.c
…
user_namespace.c ucounts: Split rlimit and ucount values and max values 2022-10-09 16:24:05 -07:00
usermode_driver.c
…
utsname.c
…
utsname_sysctl.c kernel/utsname_sysctl.c: Fix hostname polling 2022-10-23 12:01:01 -07:00
watch_queue.c watch_queue: prevent dangling pipe pointer 2023-07-19 16:22:10 +02:00
watchdog.c
…
watchdog_hld.c watchdog/perf: more properly prevent false positives with turbo modes 2023-07-19 16:21:08 +02:00
workqueue.c workqueue: clean up WORK_* constant types, clarify masking 2023-07-23 13:49:19 +02:00
workqueue_internal.h
…