audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=7060 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (0 ticks this GP) idle=e9a4/1/0x4000000000000000 softirq=35481/35481 fqs=0 rcu: (detected by 0, t=10502 jiffies, g=35257, q=398 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 10710 Comm: syz-executor Not tainted 6.13.0-rc6-syzkaller-00130-g2144da25584e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319 Code: 0a 8c 48 c7 c6 80 bc 0a 8c e8 7c 15 9f f5 90 0f 0b 90 90 90 eb c6 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 31 c0 83 3d 27 57 57 04 00 74 1e 83 3d ba 88 57 04 00 RSP: 0018:ffffc90000a18c68 EFLAGS: 00000092 RAX: 0bd7a9aefe9e8a00 RBX: ffffffff89c60102 RCX: ffff88805dc2c6d8 RDX: dffffc0000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5edd60 RBP: ffff8880217698c8 R08: ffffffff94271887 R09: 1ffffffff284e310 R10: dffffc0000000000 R11: fffffbfff284e311 R12: dffffc0000000000 R13: ffff888021769808 R14: ffff888021769800 R15: ffff888027f31360 FS: 000055555f447500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc90783ab01 CR3: 000000006586a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 000000000000000a DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock include/linux/rcupdate.h:850 [inline] advance_sched+0xa27/0xca0 net/sched/sch_taprio.c:985 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x59b/0xd30 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:89 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x8c/0x290 mm/kasan/generic.c:189 Code: 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 0f 85 c9 01 00 00 <49> ff c3 48 ff c5 75 ee e9 1e 01 00 00 45 89 dc 41 83 e4 07 0f 84 RSP: 0018:ffffc900165bf520 EFLAGS: 00000246 RAX: ffffc900165bff01 RBX: 1ffff92002cb7ed2 RCX: ffffffff814bb57b RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900165bf690 RBP: fffffffffffffffe R08: ffffc900165bf69f R09: 1ffff92002cb7ed3 R10: dffffc0000000000 R11: fffff52002cb7ed2 R12: ffffc900165c0000 R13: ffffc900165bf640 R14: dffffc0000000001 R15: fffff52002cb7ed4 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 unwind_next_frame+0xcfb/0x22d0 arch/x86/kernel/unwind_orc.c:592 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x196/0x430 mm/slub.c:4761 tomoyo_path_perm+0x56e/0x740 security/tomoyo/file.c:840 tomoyo_path_symlink+0xde/0x120 security/tomoyo/tomoyo.c:212 security_path_symlink+0x16f/0x370 security/security.c:1979 do_symlinkat+0x136/0x3a0 fs/namei.c:4693 __do_sys_symlinkat fs/namei.c:4711 [inline] __se_sys_symlinkat fs/namei.c:4708 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4708 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc9077852a7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcfe293448 EFLAGS: 00000206 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc9077852a7 RDX: 00007fc907803318 RSI: 00000000ffffff9c RDI: 00007ffcfe2934d0 RBP: 00007ffcfe29347c R08: 0000000000000017 R09: 00007ffcfe293197 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000032 R13: 0000000000068362 R14: 00007ffcfe2934d0 R15: 00007ffcfe2934d0 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g35257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=21459 rcu: rcu_preempt kthread starved for 10502 jiffies! g35257 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:25976 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244