CVE-2023-54045

audit: fix possible soft lockup in __audit_inode_child()

N/A

Published: December 24, 2025 at 12:22 PM UTC

Updated: June 17, 2026 at 06:46 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.3%

Description

In the Linux kernel, the following vulnerability has been resolved: audit: fix possible soft lockup in __audit_inode_child() 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.3 ≤ v < 4.14.3263.3 ≤ v < 4.19.2953.3 ≤ v < 5.10.1953.3 ≤ v < 5.15.1323.3 ≤ v < 5.4.2573.3 ≤ v < 6.1.533.3 ≤ v < 6.4.163.3 ≤ v < 6.5.33.3 ≤ v < 6.63.35195d8e217a78697152d64fc09a16e063a022465

Vendor states this is fixed in 0152e7758cc4e9f8bfba8dbea4438d8e488d6c08 (fixed)

Vendor states this is fixed in 1640c7bd4eddec6c72f3a99cbb74e333a2ce9f5d (fixed)

Vendor states this is fixed in 8a40b491372966ba5426e138a53460985565d5a6 (fixed)

Vendor states this is fixed in 8e76b944a7b9bddef190ffe2e29c9ae342ab91ed (fixed)

Vendor states this is fixed in 98ef243d5900d75a64539a2165745bffbb155d43 (fixed)

Vendor states this is fixed in 9ca08adb75fb40a8f742c371927ee73f9dc753bf (fixed)

Vendor states this is fixed in b59bc6e37237e37eadf50cd5de369e913f524463 (fixed)

Vendor states this is fixed in d061e2bfc20f2914656385816e0d20566213c54c (fixed)

Vendor states this is fixed in f6364fa751d7486502c777f124a14d4d543fc5eb (fixed)

Vendor states this is fixed in 3.3 (unaffected)

Vendor states this is fixed in 4.14.326 (unaffected)

Vendor states this is fixed in 4.19.295 (unaffected)