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Dismiss alert {{ message }} gregkh / linux Public Notifications You must be signed in to change notification settings Fork 676 Star 636 Code Actions Security and quality 0 Insights Additional navigation options Code Actions Security and quality Insights Commit f6364fa Browse files Browse files gscui authored and gregkh committed audit: fix possible soft lockup in __audit_inode_child() [ Upstream commit b59bc6e ] 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 &amp;&amp; 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: 5195d8e ("audit: dynamically allocate audit_names when not enough space is in the names array") Signed-off-by: Gaosheng Cui &lt;cuigaosheng1@huawei.com&gt; Signed-off-by: Paul Moore &lt;paul@paul-moore.com&gt; Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt; 1 parent 43f0c2b commit f6364fa Copy full SHA for f6364fa 1 file changed + 2 Lines changed: 2 additions &amp; 0 deletions File tree Expand file tree Collapse file tree Open diff view settings Filter options kernel auditsc.c Expand file tree Collapse file tree Open diff view settings Collapse file ‎ kernel/auditsc.c ‎ Copy file name to clipboard Expand all lines: kernel/auditsc.c + 2 Lines changed: 2 additions &amp; 0 deletions Original file line number Diff line number Diff line change @@ -2161,6 +2161,8 @@ void __audit_inode_child(struct inode *parent, 2161 2161 } 2162 2162 } 2163 2163 2164 + cond_resched (); 2165 + 2164 2166 /* is there a matching child entry? */ 2165 2167 list_for_each_entry ( n , &amp; context -&gt; names_list , list ) { 2166 2168 /* can only match entries that have a name */ 0 commit comments Comments 0 ( 0 ) Footer &copy; 2026 GitHub,&nbsp;Inc. 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