rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10499 ticks this GP) idle=e9e/1/0x4000000000000000 softirq=137265/137265 fqs=2
(t=10501 jiffies g=230409 q=221)
rcu: rcu_preempt kthread starved for 10498 jiffies! g230409 f0x0 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:
rcu_preempt R running task 29120 10 2 0x00004000
Call Trace:
context_switch kernel/sched/core.c:3453 [inline]
__schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178
schedule+0xd0/0x2a0 kernel/sched/core.c:4253
schedule_timeout+0x148/0x250 kernel/time/timer.c:1897
rcu_gp_fqs_loop kernel/rcu/tree.c:1874 [inline]
rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2044
kthread+0x3b5/0x4a0 kernel/kthread.c:291
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
NMI backtrace for cpu 1
CPU: 1 PID: 4627 Comm: syz-executor.3 Not tainted 5.8.0-rc3-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:320
print_cpu_stall kernel/rcu/tree_stall.h:553 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
rcu_pending kernel/rcu/tree.c:3489 [inline]
rcu_sched_clock_irq.cold+0x5b3/0xccc kernel/rcu/tree.c:2504
update_process_times+0x25/0x60 kernel/time/timer.c:1726
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320
__run_hrtimer kernel/time/hrtimer.c:1520 [inline]
__hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584
hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
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+0x4f/0x120 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
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 50 e0 b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 4e ad cd 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 3b 3f 68 f9 65 8b 05 a4 cb 1a 78 85 c0 74 02 5d
RSP: 0018:ffffc90000da8e10 EFLAGS: 00000286
RAX: 1ffffffff1369c0a RBX: ffffffff864c43a0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87e732df
RBP: ffff8880ae7255c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000da8e90
R13: 0000000000000000 R14: ffff8880ae7255c0 R15: dffffc0000000000
expire_timers kernel/time/timer.c:1448 [inline]
__run_timers.part.0+0x53c/0xa20 kernel/time/timer.c:1773
__run_timers kernel/time/timer.c:1745 [inline]
run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786
__do_softirq+0x34c/0xa60 kernel/softirq.c:292
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
__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+0x111/0x170 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:387 [inline]
__irq_exit_rcu kernel/softirq.c:417 [inline]
irq_exit_rcu+0x229/0x270 kernel/softirq.c:429
sysvec_apic_timer_interrupt+0x54/0x120 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:vsnprintf+0x143/0x14f0 lib/vsprintf.c:2572
Code: 48 89 44 24 08 0f 84 be 10 00 00 49 8d 47 08 48 bb 00 00 00 00 00 fc ff df 48 89 44 24 40 48 c1 e8 03 48 01 d8 48 89 44 24 30 78 40 c3 fd 48 8b 74 24 08 48 89 ef e8 cb 11 ff ff 44 0f b6 44
RSP: 0018:ffffc90004777518 EFLAGS: 00000202
RAX: 0000000000000002 RBX: dffffc0000000000 RCX: ffffffff83b077b7
RDX: 0000000000000025 RSI: ffff888019ffa500 RDI: 0000000000000001
RBP: ffffffff888cd428 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90004777653
R13: ffffffff888cd428 R14: 0000000000000025 R15: ffffc900047776f8
tomoyo_supervisor+0x10c/0xeb0 security/tomoyo/common.c:2069
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x25c/0x360 security/tomoyo/file.c:573
tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
tomoyo_file_open security/tomoyo/tomoyo.c:313 [inline]
tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:308
security_file_open+0x52/0x3f0 security/security.c:1559
do_dentry_open+0x3a0/0x1290 fs/open.c:815
do_open fs/namei.c:3243 [inline]
path_openat+0x1bb9/0x2750 fs/namei.c:3360
do_filp_open+0x17e/0x3c0 fs/namei.c:3387
do_sys_openat2+0x16f/0x3b0 fs/open.c:1179
do_sys_open fs/open.c:1195 [inline]
ksys_open include/linux/syscalls.h:1388 [inline]
__do_sys_open fs/open.c:1201 [inline]
__se_sys_open fs/open.c:1199 [inline]
__x64_sys_open+0x119/0x1c0 fs/open.c:1199
do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x416921
Code: Bad RIP value.
RSP: 002b:00007f8fe90497a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416921
RDX: 0000000000000000 RSI: 0000000000000041 RDI: 00007f8fe9049850
RBP: 000000000078bf00 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c5d R14: 00000000004ceb95 R15: 00007f8fe904a6d4