rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=53a/1/0x4000000000000000 softirq=120800/120800 fqs=0
(t=10501 jiffies g=232961 q=757)
rcu: rcu_preempt kthread starved for 10502 jiffies! g232961 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:29080 pid: 10 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:3778 [inline]
__schedule+0x8e5/0x21e0 kernel/sched/core.c:4527
schedule+0xd0/0x2a0 kernel/sched/core.c:4602
schedule_timeout+0x148/0x250 kernel/time/timer.c:1879
rcu_gp_fqs_loop kernel/rcu/tree.c:1888 [inline]
rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2058
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
NMI backtrace for cpu 1
CPU: 1 PID: 15001 Comm: syz-executor.4 Not tainted 5.9.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x18f/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318
print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
rcu_pending kernel/rcu/tree.c:3637 [inline]
rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519
update_process_times+0x25/0xa0 kernel/time/timer.c:1710
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
__run_hrtimer kernel/time/hrtimer.c:1524 [inline]
__hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1588
hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1650
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
__sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
sysvec_apic_timer_interrupt+0x4c/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:lock_acquire+0x27b/0xad0 kernel/locking/lockdep.c:5008
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d aa ce 5b 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc90000da8c20 EFLAGS: 00000286
RAX: 1ffffffff136c779 RBX: ffff8881c9e02180 RCX: ffffffff815a14fb
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c5f3aaf
R10: fffffbfff18be755 R11: 0000000000000001 R12: 0000000000000000
R13: ffffc90000da8d68 R14: 0000000000000000 R15: ffff8881c9e02180
call_timer_fn+0x12e/0x760 kernel/time/timer.c:1410
expire_timers kernel/time/timer.c:1458 [inline]
__run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
__run_timers kernel/time/timer.c:1736 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
__do_softirq+0x2de/0xa24 kernel/softirq.c:298
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:393 [inline]
__irq_exit_rcu kernel/softirq.c:423 [inline]
irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 d8 3b b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 36 06 c0 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 cb 7d 59 f9 65 8b 05 c4 c8 0b 78 85 c0 74 02 5d
RSP: 0018:ffffc9001cb2f720 EFLAGS: 00000286
RAX: 1ffffffff136c77b RBX: ffff8881c9e02180 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6357f
RBP: ffff8880ae735e00 R08: 0000000000000001 R09: ffffffff8c5f3a77
R10: fffffbfff18be74e R11: 0000000000000001 R12: ffff8880ae735e00
R13: ffff88804f8d2480 R14: 0000000000000000 R15: 0000000000000001
finish_lock_switch kernel/sched/core.c:3517 [inline]
finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
context_switch kernel/sched/core.c:3781 [inline]
__schedule+0x8ed/0x21e0 kernel/sched/core.c:4527
preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4785
irqentry_exit_cond_resched kernel/entry/common.c:333 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:325 [inline]
irqentry_exit+0x65/0x90 kernel/entry/common.c:363
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:197
Code: fe 01 00 65 8b 05 60 bf 8d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 24 14 00 00 85 c0 74 2b 8b 82 00 14 00 00 <83> f8 02 75 20 48 8b 8a 08 14 00 00 8b 92 04 14 00 00 48 8b 01 48
RSP: 0018:ffffc9001cb2f940 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000004 RCX: ffffffff836668e7
RDX: ffff8881c9e02180 RSI: ffffffff836668fa RDI: 0000000000000005
RBP: ffff8880a8591d80 R08: 0000000000000001 R09: ffffffff8cb1e3c7
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000303 R14: dffffc0000000000 R15: 0000000000000000
tomoyo_domain_quota_is_ok+0x31a/0x550 security/tomoyo/util.c:1070
tomoyo_supervisor+0x2d4/0xeb0 security/tomoyo/common.c:2089
tomoyo_audit_path_number_log security/tomoyo/file.c:235 [inline]
tomoyo_path_number_perm+0x3ed/0x4d0 security/tomoyo/file.c:734
tomoyo_path_mkdir+0x98/0xe0 security/tomoyo/tomoyo.c:167
security_path_mkdir+0xe8/0x160 security/security.c:1085
do_mkdirat+0x14b/0x2d0 fs/namei.c:3670
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6e24d2bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000020a80 RCX: 000000000045d5b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 000000000118d018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec
R13: 000000000169fb6f R14: 00007f6e24d2c9c0 R15: 000000000118cfec