rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10477 ticks this GP) idle=08f/1/0x4000000000000000 softirq=40134/40136 fqs=5243 
	(t=10501 jiffies g=52677 q=4216)
NMI backtrace for cpu 0
CPU: 0 PID: 15033 Comm: syz.3.2559 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <IRQ>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x22d/0x380 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x31f/0x5f0 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3936 [inline]
 rcu_sched_clock_irq+0x6ec/0x1120 kernel/rcu/tree.c:2619
 update_process_times+0x193/0x200 kernel/time/timer.c:2021
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4b0/0xb60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x397/0x8b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1108
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 00 00 00 66 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 5e 83 93 f7 48 89 df e8 96 5a 94 f7 e8 b1 53 b5 f7 fb bf 01 00 00 00 <e8> 66 70 88 f7 65 8b 05 d7 87 38 76 85 c0 74 02 5b c3 e8 14 95 36
RSP: 0018:ffffc90000007c70 EFLAGS: 00000282
RAX: bc9874530080f700 RBX: ffff8880b90280c0 RCX: bc9874530080f700
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc90000007df0 R08: ffffffff901ef177 R09: 1ffffffff203de2e
R10: dffffc0000000000 R11: fffffbfff203de2f R12: 1ffff11017205020
R13: ffff8880b90280c0 R14: ffff88805f9b3c10 R15: ffffc90000007d40
 expire_timers kernel/time/timer.c:1698 [inline]
 __run_timers+0x55c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6799
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 c5 96 89 f7 e8 90 7b b6 f7 fb bf 01 00 00 00 <e8> d5 b5 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90003f478c0 EFLAGS: 00000282
RAX: bc9874530080f700 RBX: 0000000000000000 RCX: bc9874530080f700
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: 0000000000000001
RBP: ffffc90003f47960 R08: ffffffff901ef177 R09: 1ffffffff203de2e
R10: dffffc0000000000 R11: fffffbfff203de2f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920007e8f18
 irqentry_exit+0x63/0x70 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__sanitizer_cov_trace_pc+0x55/0x60 kernel/kcov.c:213
Code: 2c 8b 91 10 16 00 00 83 fa 02 75 21 48 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39 cf 73 08 48 89 44 f2 08 <48> 89 3a c3 0f 1f 80 00 00 00 00 48 8b 04 24 65 48 8b 0d b4 5f 89
RSP: 0018:ffffc90003f47a28 EFLAGS: 00000287
RAX: ffffffff83a8cba4 RBX: 000000000000000a RCX: 0000000000080000
RDX: ffffc9000e62a000 RSI: 00000000000609ff RDI: 0000000000060a00
RBP: ffff8880181bcb01 R08: ffff8880181bcbb7 R09: 1ffff11003037976
R10: dffffc0000000000 R11: ffffed1003037977 R12: dffffc0000000000
R13: 0000000000000970 R14: 0000000000000009 R15: ffff8880181bcbb0
 tomoyo_check_acl+0x334/0x420 security/tomoyo/domain.c:183
 tomoyo_path_permission+0x1a6/0x3a0 security/tomoyo/file.c:586
 tomoyo_path_perm+0x423/0x5d0 security/tomoyo/file.c:838
 tomoyo_path_unlink+0xa7/0xf0 security/tomoyo/tomoyo.c:149
 security_path_unlink+0xd8/0x130 security/security.c:1220
 do_unlinkat+0x2fc/0x710 fs/namei.c:4395
 __do_sys_unlink fs/namei.c:4447 [inline]
 __se_sys_unlink fs/namei.c:4445 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4445
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f482be35159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f482a06c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f482c0bd090 RCX: 00007f482be35159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f482becc024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f482c0bd128 R14: 00007f482c0bd090 R15: 00007ffd5cfc37d8
 </TASK>