rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=7f2/1/0x4000000000000000 softirq=40518/40518 fqs=0 
	(detected by 0, t=10502 jiffies, g=67893, q=214)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 19700 Comm: systemd-udevd Not tainted 5.10.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_is_held_type+0xc2/0x100 kernel/locking/lockdep.c:5480
Code: 03 44 39 f0 41 0f 94 c4 48 c7 c7 40 5e 4b 89 e8 d4 0b 00 00 b8 ff ff ff ff 65 0f c1 05 17 5a 1d 77 83 f8 01 75 23 ff 34 24 9d <48> 83 c4 08 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 e4 eb
RSP: 0018:ffffc90000d90bc0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000005 RCX: 1ffffffff19d97cb
RDX: 0000000000000000 RSI: 0000000000010003 RDI: 0000000000000000
RBP: ffffffff8b3370a0 R08: 0000000000000000 R09: ffffffff8cec8c8f
R10: fffffbfff19d9191 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888026323d90 R14: 00000000ffffffff R15: ffff888026323e30
FS:  00007fce759cd8c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee21000 CR3: 000000006170a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held include/linux/lockdep.h:271 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:123
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x5b7/0x710 kernel/locking/lockdep.c:5447
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_unlock_irqrestore+0x16/0x50 kernel/locking/spinlock.c:191
 debug_object_activate+0x287/0x3e0 lib/debugobjects.c:684
 debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
 debug_activate kernel/time/hrtimer.c:475 [inline]
 enqueue_hrtimer+0x23/0x3b0 kernel/time/hrtimer.c:964
 __run_hrtimer kernel/time/hrtimer.c:1536 [inline]
 __hrtimer_run_queues+0xb54/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1097
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
RIP: 0010:tomoyo_domain_quota_is_ok+0xf3/0x550 security/tomoyo/util.c:1049
Code: 02 00 0f 85 10 04 00 00 48 8b 44 24 08 45 31 ed 48 8b 68 10 48 3b 2c 24 0f 84 f4 00 00 00 49 be 00 00 00 00 00 fc ff df eb 5f <e8> e8 fa f0 fd 48 89 e8 48 89 ee 48 c1 e8 03 83 e6 07 42 0f b6 0c
RSP: 0018:ffffc9001609f3f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000010 RCX: ffffffff837f208a
RDX: 0000000000000010 RSI: ffff888026323480 RDI: 0000000000000001
RBP: ffff88801afa9400 R08: 0000000000000001 R09: ffffffff8f076b07
R10: 0000000000000010 R11: 0000000000000000 R12: 0000000000000026
R13: 0000000000000233 R14: dffffc0000000000 R15: 0000000000000000
 tomoyo_supervisor+0x2f2/0xef0 security/tomoyo/common.c:2089
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x419/0x590 security/tomoyo/file.c:734
 tomoyo_path_mknod+0x10d/0x190 security/tomoyo/tomoyo.c:240
 security_path_mknod+0xf9/0x170 security/security.c:1078
 may_o_create fs/namei.c:2928 [inline]
 lookup_open.isra.0+0x431/0x1350 fs/namei.c:3069
 open_last_lookups fs/namei.c:3178 [inline]
 path_openat+0x96d/0x2730 fs/namei.c:3366
 do_filp_open+0x17e/0x3c0 fs/namei.c:3396
 do_sys_openat2+0x16d/0x420 fs/open.c:1168
 do_sys_open fs/open.c:1184 [inline]
 __do_sys_open fs/open.c:1192 [inline]
 __se_sys_open fs/open.c:1188 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1188
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fce748406f0
Code: 00 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 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24
RSP: 002b:00007ffe7e2aaa88 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fce748406f0
RDX: 0000000000000180 RSI: 00000000000800c2 RDI: 0000556969862260
RBP: 000000000003a2f8 R08: 000000000000fefe R09: 0000000000000030
R10: 0000000000000000 R11: 0000000000000246 R12: 0000556969862275
R13: 8421084210842109 R14: 00000000000800c2 R15: 00007fce748ce540
rcu: rcu_preempt kthread starved for 10502 jiffies! g67893 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:28880 pid:   11 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3774 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4523
 schedule+0xcf/0x270 kernel/sched/core.c:4601
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1871
 rcu_gp_fqs_loop kernel/rcu/tree.c:1925 [inline]
 rcu_gp_kthread+0xb4c/0x1c90 kernel/rcu/tree.c:2099
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296