rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=28f/1/0x4000000000000000 softirq=124949/124949 fqs=9
(t=10501 jiffies g=226413 q=206)
rcu: rcu_preempt kthread starved for 10473 jiffies! g226413 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:
task:rcu_preempt state:R running task stack:26064 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1957
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2130
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 31370 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:35 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:lock_release+0x566/0x810 kernel/locking/lockdep.c:5648
Code: 4c 89 f3 48 c1 eb 03 42 80 3c 23 00 74 08 4c 89 f7 e8 ce b4 69 00 48 c7 84 24 90 00 00 00 00 00 00 00 9c 8f 84 24 90 00 00 00 <42> 80 3c 23 00 74 08 4c 89 f7 e8 2b b4 69 00 f6 84 24 91 00 00 00
RSP: 0000:ffffc90000007c20 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff92000000f96 RCX: dffffc0000000000
RDX: 1ffff92000000f94 RSI: 0000000000010102 RDI: 0000000000000000
RBP: ffffc90000007d50 R08: dffffc0000000000 R09: ffffed10173864a2
R10: ffffed10173864a2 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000f90 R14: ffffc90000007cb0 R15: 0000000000000046
FS: 00007f009b982700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f009b982718 CR3: 0000000028b1c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
seqcount_lockdep_reader_access+0x111/0x230 include/linux/seqlock.h:102
timekeeping_get_delta kernel/time/timekeeping.c:252 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:386 [inline]
ktime_get_update_offsets_now+0xb5/0x460 kernel/time/timekeeping.c:2300
hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
hrtimer_interrupt+0x143/0x1040 kernel/time/hrtimer.c:1793
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 21 53 fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 8e d9 67 f7 48 89 df e8 96 8a 69 f7 e8 11 9f 8c f7 fb bf 01 00 00 00 16 f1 5b f7 65 8b 05 47 5c 04 76 85 c0 74 02 5b c3 e8 cc c3 02
RSP: 0000:ffffc9000c61fbf0 EFLAGS: 00000286
RAX: 8577d9ca4128f400 RBX: ffff8880b9c200c0 RCX: ffffffff90934903
RDX: dffffc0000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffffc9000c61fd50 R08: ffffffff818a32b0 R09: ffffed1017384019
R10: ffffed1017384019 R11: 0000000000000000 R12: ffffffff88299e20
R13: dffffc0000000000 R14: ffff8880b9c20100 R15: ffff8880abe8f410
expire_timers kernel/time/timer.c:1465 [inline]
__run_timers+0x70a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0033:0x7f009e3d46a0
Code: 41 0a 0f 94 c3 e9 26 ff ff ff 48 83 ec 08 31 c0 41 51 4d 89 c1 49 89 c8 48 89 d1 48 89 f2 48 89 fe 4c 89 d7 e8 31 94 05 00 59 <5e> eb 8e 48 8d 3d 8a 27 0b 00 e8 f1 6f ff ff 48 8d 3d 7a 45 0a 00
RSP: 002b:00007f009b982198 EFLAGS: 00000286
RAX: ffffffffffffffff RBX: 00007f009e541020 RCX: 0000000000000000
RDX: 00000000200018c0 RSI: 0000000084009422 RDI: ffffffffffffffff
RBP: 00007f009e487f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc727848ef R14: 00007f009b982300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 31357 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2599
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 b2 93 d1 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 97 f1 5b f7 65 8b 05 c8 5c 04 76 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90000dc0ac0 EFLAGS: 00000206
RAX: b30ec92959a3e700 RBX: 1ffff920001b815c RCX: ffffffff8165c2f1
RDX: dffffc0000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffffc90000dc0b48 R08: dffffc0000000000 R09: fffffbfff1fa39f4
R10: fffffbfff1fa39f4 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920001b8158 R14: ffffc90000dc0ae0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
skb_dequeue+0x10e/0x140 net/core/skbuff.c:3216
garp_queue_xmit net/802/garp.c:271 [inline]
garp_join_timer+0x95/0x130 net/802/garp.c:423
call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x71a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:tomoyo_check_acl+0xbd/0x430 security/tomoyo/domain.c:173
Code: 49 39 dc 0f 84 14 02 00 00 0f 1f 40 00 49 8d 6c 24 18 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 1d 01 00 00 0f b6 6d 00 <31> ff 89 ee e8 ea 0e aa fd 85 ed 74 16 e8 11 0c aa fd e9 c6 00 00
RSP: 0018:ffffc9000c29fb80 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807236cd90 RCX: 0000000000040000
RDX: ffffc90014480000 RSI: 0000000000000e6c RDI: 0000000000000e6d
RBP: 0000000000000000 R08: ffffffff83d9aa16 R09: ffffffff83db45e2
R10: 0000000000000002 R11: ffff888071f5b900 R12: ffff88807705f000
R13: dffffc0000000000 R14: ffff88807236cd80 R15: 0000000000000000
tomoyo_path_number_perm+0x42f/0x7c0 security/tomoyo/file.c:733
security_file_ioctl+0x55/0xb0 security/security.c:1540
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f009e42dae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f009b9a3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f009e540f60 RCX: 00007f009e42dae9
RDX: 0000000020000340 RSI: 00000000d000941e RDI: 0000000000000007
RBP: 00007f009e487f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc727848ef R14: 00007f009b9a3300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 4c 89 f3 mov %r14,%rbx
3: 48 c1 eb 03 shr $0x3,%rbx
7: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
c: 74 08 je 0x16
e: 4c 89 f7 mov %r14,%rdi
11: e8 ce b4 69 00 callq 0x69b4e4
16: 48 c7 84 24 90 00 00 movq $0x0,0x90(%rsp)
1d: 00 00 00 00 00
22: 9c pushfq
23: 8f 84 24 90 00 00 00 popq 0x90(%rsp)
* 2a: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 f7 mov %r14,%rdi
34: e8 2b b4 69 00 callq 0x69b464
39: f6 .byte 0xf6
3a: 84 24 91 test %ah,(%rcx,%rdx,4)
3d: 00 00 add %al,(%rax)