rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=20565, q=379 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10498 (4294972745-4294962247), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10498 jiffies! g20565 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:R  running task     stack:27224 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>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5846 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline]
RIP: 0010:lock_acquire+0x124/0x360 kernel/locking/lockdep.c:5870
Code: 02 00 00 41 0f 94 c1 4c 89 ef 89 de 8b 54 24 04 44 89 e1 45 89 f0 6a 00 6a 00 6a 00 55 ff 74 24 30 e8 e0 02 00 00 48 83 c4 28 <48> c7 c7 f0 29 8f 8d e8 40 d9 a8 09 b8 ff ff ff ff 65 0f c1 05 43
RSP: 0018:ffffc90000007bc0 EFLAGS: 00000096
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 3ddd47c876dfb900
RDX: 0000000000000000 RSI: ffff888026ff0b58 RDI: ffff888026ff0000
RBP: ffffffff895fd734 R08: 0000000000000000 R09: ffffffff895fd734
R10: dffffc0000000000 R11: ffffffff895fd670 R12: 0000000000000000
R13: ffff888028bfb300 R14: 0000000000000001 R15: 0000000000000046
FS:  00007f8cfdd4c880(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa22bac2368 CR3: 000000005853e000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 advance_sched+0xc4/0xc90 net/sched/sch_taprio.c:929
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x52c/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+0x10b/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:697
RIP: 0010:format_decode+0xcc/0xe30 lib/vsprintf.c:-1
Code: 89 e7 e8 97 a1 e3 f6 eb c4 e8 00 ed 7d f6 eb 05 e8 f9 ec 7d f6 4d 85 f6 41 0f 94 c6 0f b6 db 31 ff 89 de e8 e6 ef 7d f6 84 db <0f> 95 c0 41 84 c6 75 16 e8 d7 ec 7d f6 4c 8b 74 24 18 49 81 e6 00
RSP: 0018:ffffc90002fa72d0 EFLAGS: 00000246
RAX: ffffffff8b42178a RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888026ff0000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8bb7e4aa R08: ffff888026ff0000 R09: 0000000000000002
R10: 0000000000000025 R11: 0000000000000000 R12: ffffffff8bb7e4ab
R13: ffffc90002fa7378 R14: 0000000000000000 R15: ffffffff8bb7e4aa
 vsnprintf+0x102/0xf00 lib/vsprintf.c:2869
 tomoyo_supervisor+0x133/0x1480 security/tomoyo/common.c:2170
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission+0x25a/0x380 security/tomoyo/file.c:587
 tomoyo_check_open_permission+0x24d/0x3b0 security/tomoyo/file.c:777
 security_file_open+0xb1/0x270 security/security.c:3183
 do_dentry_open+0x384/0x13f0 fs/open.c:942
 vfs_open+0x3b/0x340 fs/open.c:1097
 do_open fs/namei.c:3975 [inline]
 path_openat+0x2ee5/0x3830 fs/namei.c:4134
 do_filp_open+0x1fa/0x410 fs/namei.c:4161
 do_sys_openat2+0x121/0x1c0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_openat fs/open.c:1468 [inline]
 __se_sys_openat fs/open.c:1463 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1463
 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: 0033:0x7f8cfd6a7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe5876fee0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8cfdd4c880 RCX: 00007f8cfd6a7407
RDX: 0000000000080000 RSI: 0000556f95aa3790 RDI: ffffffffffffff9c
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000556f5712995f
R13: 0000556f5713a660 R14: 0000000000000000 R15: 00000000ffffffff
 </TASK>