rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (3 ticks this GP) idle=7e24/1/0x4000000000000000 softirq=14928/14928 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=11017, q=1775 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5955 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline]
RIP: 0010:__lock_acquire+0x893/0xd20 kernel/locking/lockdep.c:5233
Code: 83 3d 64 51 01 0e 00 0f 85 36 02 00 00 48 83 7c 24 28 00 0f 84 bc 01 00 00 41 8b 46 f8 25 ff 1f 00 00 48 0f a3 05 6d d5 fb 11 <0f> 83 5a 01 00 00 48 69 c0 c8 00 00 00 48 8d 80 30 c3 39 93 e9 87
RSP: 0018:ffffc90000a08ab0 EFLAGS: 00000003
RAX: 000000000000006e RBX: 0000000000000002 RCX: 00000000cf092d04
RDX: 000000004cce94d0 RSI: 00000000e2813c22 RDI: ffff8880203c9e40
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8499343b
R10: ffffc90000a08ca0 R11: fffff52000141196 R12: 000000004d67b65a
R13: ffff8880203ca970 R14: ffff8880203ca9c0 R15: 8313d3c9cf092d04
FS:  0000555589f66500(0000) GS:ffff888125e0f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa4130d120 CR3: 0000000028a48000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
 debug_object_activate+0xbb/0x420 lib/debugobjects.c:818
 debug_hrtimer_activate kernel/time/hrtimer.c:438 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1081
 __run_hrtimer kernel/time/hrtimer.c:1794 [inline]
 __hrtimer_run_queues+0x656/0xc60 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:tomoyo_check_acl+0x1d0/0x400 security/tomoyo/domain.c:171
Code: 04 18 84 c0 75 44 49 8d 7e 07 48 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 75 4a 4d 8b 36 49 39 ee 0f 84 c9 00 00 00 e8 80 02 82 fd <e9> e0 fe ff ff 44 89 f9 80 e1 07 38 c1 0f 8c e9 fe ff ff 4c 89 ff
RSP: 0018:ffffc90003c3fb90 EFLAGS: 00000293
RAX: ffffffff843d9180 RBX: dffffc0000000000 RCX: ffff8880203c9e40
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888027767207
RBP: ffff888024305290 R08: ffff8880203c9e40 R09: 0000000000000002
R10: 000000000000005c R11: ffffffff843de5f0 R12: 0000000000000004
R13: 0000000000000000 R14: ffff8881432ad700 R15: 0000000000000002
 tomoyo_path_number_perm+0x2dc/0x5a0 security/tomoyo/file.c:733
 security_file_ioctl+0xcb/0x2d0 security/security.c:2982
 __do_sys_ioctl fs/ioctl.c:591 [inline]
 __se_sys_ioctl+0x47/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f54cbd8eacb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fff95da8600 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f54cbd8eacb
RDX: 00007fff95da8660 RSI: 0000000000008933 RDI: 0000000000000005
RBP: 00007fff95da8660 R08: 0000000000000005 R09: 0030696669775f74
R10: 0000000000000027 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f54ccb14620 R14: 0000000000000006 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g11017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3869
rcu: rcu_preempt kthread starved for 10502 jiffies! g11017 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:27496 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>