rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=7f6/1/0x4000000000000004 softirq=182361/182361 fqs=2 
	(t=10500 jiffies g=195809 q=265)
NMI backtrace for cpu 1
CPU: 1 PID: 7229 Comm: syz-executor.2 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 nmi_cpu_backtrace+0xaa/0x190 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x16f/0x290 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq+0x1521/0x1ab0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:171 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1314
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x3f3/0x840 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x37c/0xda0 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x5a/0x80 kernel/locking/spinlock.c:199
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 38 91 0a 89 e8 d7 ac b5 f9 48 83 3d 87 7f 0d 01 00 74 26 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 4c d1 55 f9 65 8b 05 01 0c 05 78 85 c0 74 03 5b
RSP: 0018:ffffc90000da8d98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff1215227 RBX: ffff8880aed27080 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888098ef0b04
RBP: ffffc90000da8da0 R08: ffff888098ef0b18 R09: fffffbfff13cd12d
R10: fffffbfff13cd12d R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88809202ec10 R14: ffff88809202ec18 R15: ffffffff866c3600
 expire_timers kernel/time/timer.c:1448 [inline]
 __run_timers+0x766/0x970 kernel/time/timer.c:1773
 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786
 __do_softirq+0x283/0x7bd arch/x86/include/asm/paravirt.h:762
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x227/0x230 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:check_kcov_mode kernel/kcov.c:164 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:187
Code: 5b 5d c3 cc 55 48 89 e5 48 8b 45 08 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 c4 9d 8b 7e f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 <83> fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 8b 89 84
RSP: 0018:ffffc90001877860 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffffffff835f882b RBX: 0000000000000002 RCX: ffff888098ef02c0
RDX: 0000000000000002 RSI: 000000000000491c RDI: 000000000000491d
RBP: ffffc90001877860 R08: ffffffff835fda79 R09: ffffffff8361090c
R10: ffff888098ef02c0 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88808fc82e00 R15: ffff88808fc82e00
 tomoyo_check_acl+0x19b/0x3b0 security/tomoyo/domain.c:175
 tomoyo_path_number_perm+0x382/0x690 security/tomoyo/file.c:733
 tomoyo_path_mknod+0x134/0x160 security/tomoyo/tomoyo.c:246
 security_path_mknod+0xea/0x170 security/security.c:1021
 may_o_create fs/namei.c:2969 [inline]
 lookup_open fs/namei.c:3130 [inline]
 do_last fs/namei.c:3267 [inline]
 path_openat+0x1456/0x4250 fs/namei.c:3473
 do_filp_open+0x192/0x3d0 fs/namei.c:3503
 do_sys_open+0x29f/0x560 fs/open.c:1097
 ksys_open include/linux/syscalls.h:1383 [inline]
 __do_sys_creat fs/open.c:1155 [inline]
 __se_sys_creat fs/open.c:1153 [inline]
 __x64_sys_creat+0x65/0x70 fs/open.c:1153
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe1a6880c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fe1a68816d4 RCX: 000000000045b349
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000094 R14: 00000000004c1dad R15: 000000000075bf2c