rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=6fa/1/0x4000000000000002 softirq=10707/10707 fqs=0 
	(t=10501 jiffies g=6429 q=83)
rcu: rcu_preempt kthread starved for 10502 jiffies! g6429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29032    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081
 schedule+0x181/0x210 kernel/sched/core.c:4155
 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821
 kthread+0x332/0x350 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 8299 Comm: blkid Not tainted 5.4.0-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+0xaf/0x1a0 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x174/0x290 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+0xe25/0x1ad0 kernel/rcu/tree.c:2271
 update_process_times+0x12d/0x180 kernel/time/timer.c:1726
 tick_sched_handle kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x38c/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
 </IRQ>
RIP: 0010:mod_memcg_page_state+0x123/0x190 include/linux/memcontrol.h:653
Code: e8 f2 9a 69 00 48 83 3d 12 21 c2 07 00 74 70 e8 63 25 2e 00 4c 89 ff 57 9d 0f 1f 44 00 00 e8 24 c1 33 00 eb 43 e8 4d 25 2e 00 <eb> 3c e8 b6 be 33 00 48 c7 c0 28 95 0a 89 48 c1 e8 03 42 80 3c 20
RSP: 0018:ffffc90002427828 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff888090530580
RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0002a4a540
RBP: ffffc90002427848 R08: dffffc0000000000 R09: fffffbfff1287a8d
R10: fffffbfff1287a8d R11: 0000000000000000 R12: dffffc0000000000
R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88809759d428
 free_thread_stack+0x168/0x590 kernel/fork.c:280
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0xa3/0x130 kernel/fork.c:451
 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256
 context_switch kernel/sched/core.c:3388 [inline]
 __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081
 preempt_schedule_irq+0xc1/0x140 kernel/sched/core.c:4338
 retint_kernel+0x1b/0x2b
RIP: 0010:string_nocheck lib/vsprintf.c:607 [inline]
RIP: 0010:string+0x93/0x2e0 lib/vsprintf.c:689
Code: cb 48 89 5d c0 45 31 ed eb 15 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 e8 3b ca 88 f9 49 ff c5 4f 8d 34 2c 4c 89 f0 48 c1 e8 03 <48> b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 72 48 8b 45 d0
RSP: 0018:ffffc90002427aa8 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff02
RAX: 1ffff92000484fbe RBX: ffffc90002427c67 RCX: ffff888090530580
RDX: 0000000000000000 RSI: 0000000000000038 RDI: 0000000000000000
RBP: ffffc90002427af0 R08: ffffffff87edcf7b R09: ffffffff87ed9ba9
R10: ffff888090530580 R11: 0000000000000012 R12: ffffc90002427df0
R13: 0000000000000006 R14: ffffc90002427df6 R15: 0000000000000038
 vsnprintf+0x100a/0x1c00 lib/vsprintf.c:2574
 tomoyo_supervisor+0xb1/0x1330 security/tomoyo/common.c:2067
 tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
 tomoyo_path_number_perm+0x471/0x640 security/tomoyo/file.c:734
 tomoyo_file_ioctl+0x23/0x30 security/tomoyo/tomoyo.c:335
 security_file_ioctl+0x6d/0xd0 security/security.c:1409
 ksys_ioctl fs/ioctl.c:747 [inline]
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0xa3/0x120 fs/ioctl.c:754
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f408e82c347
Code: 90 90 90 48 8b 05 f1 fa 2a 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 90 90 90 90 90 90 90 90 90 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 fa 2a 00 31 d2 48 29 c2 64
RSP: 002b:00007fff6bf969c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f408e82c347
RDX: 0000000000816040 RSI: 0000000080081272 RDI: 0000000000000003
RBP: 0000000000816040 R08: 00007f408eadc5a0 R09: 0000000000000005
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005