rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=449/1/0x4000000000000000 softirq=129907/129908 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12370/1:b..l
(detected by 1, t=10505 jiffies, g=205413, q=15)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4338 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_is_watching+0x75/0xb0 kernel/rcu/tree.c:1139
Code: ff df 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01 65 ff 0d 8b 04 9f 7e <74> 03 5b 5d c3 e8 20 da 9c ff 5b 5d c3 48 89 df e8 36 01 60 00 eb
RSP: 0018:ffffc90000007d18 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff8880b9c3b090 RCX: ffffffff815ce328
RDX: 0000000000000000 RSI: 0000000000010003 RDI: ffffffff8b7bd8e0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8db8eb17
R10: fffffbfff1b71d62 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff8880b9c2a5d8 R15: 0000000000000000
FS: 0000555556bcd400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d321000 CR3: 0000000025888000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5612
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x243/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:task_work_pending include/linux/task_work.h:24 [inline]
RIP: 0010:resume_user_mode_work include/linux/resume_user_mode.h:48 [inline]
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
RIP: 0010:exit_to_user_mode_prepare+0x169/0x250 kernel/entry/common.c:201
Code: e3 08 08 f6 c7 10 74 bd 4c 89 e7 e8 71 02 37 00 f7 c3 04 00 02 00 74 b5 4c 89 e7 e8 a1 03 c4 ff 83 e3 02 74 ad f0 80 65 00 fd <48> 8b 85 e8 08 00 00 48 85 c0 0f 85 be 00 00 00 48 83 bd 28 08 00
RSP: 0018:ffffc900044b7f10 EFLAGS: 00000246
RAX: 0000000000000b25 RBX: 0000000000000002 RCX: 1ffffffff1b71799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88805ee921c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ebe88 R11: 0000000000000000 R12: ffffc900044b7f58
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb7e623bd2b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007ffcf3caa410 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fb7e623bd2b
RDX: 00007fb7e63a0440 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007fb7e639d960 R08: 0000000000000000 R09: 00007fb7e63a0448
R10: 00007ffcf3caa510 R11: 0000000000000293 R12: 00000000001f7289
R13: 00007ffcf3caa510 R14: 00007fb7e639bf60 R15: 0000000000000032
task:kworker/u4:22 state:R running task stack:26336 pid:12370 ppid: 2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6696
irqentry_exit+0x31/0x80 kernel/entry/common.c:428
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5609
Code: 95 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90005727a50 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000ae4f4c RCX: 9096999c6ddb721e
RDX: 1ffff1100bd9254b RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff90072907
R10: fffffbfff200e520 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bd7f5e0 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:694 [inline]
inet_twsk_purge+0x117/0x850 net/ipv4/inet_timewait_sock.c:269
ops_exit_list+0x125/0x170 net/core/net_namespace.c:167
cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:594
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g205413 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=117214
rcu: rcu_preempt kthread starved for 10505 jiffies! g205413 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28232 pid: 16 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1971
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2144
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 14864 Comm: kworker/u4:24 Not tainted 5.18.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:490
print_other_cpu_stall kernel/rcu/tree_stall.h:595 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:741 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0x1f7c/0x2150 kernel/rcu/tree.c:2625
update_process_times+0x16d/0x200 kernel/time/timer.c:1788
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:csd_lock_wait kernel/smp.c:411 [inline]
RIP: 0010:smp_call_function_many_cond+0x49e/0x1110 kernel/smp.c:969
Code: d2 0b 00 85 ed 74 47 48 8b 04 24 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 fc 83 c5 03 e8 59 d0 0b 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 21 0a 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc90004627950 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9c44fc0 RCX: 0000000000000000
RDX: ffff8880730aa000 RSI: ffffffff816ca537 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff816ca55d R11: 0000000000000000 R12: ffffed10173889f9
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1184 [inline]
text_poke_bp_batch+0x22c/0x6b0 arch/x86/kernel/alternative.c:1372
text_poke_flush arch/x86/kernel/alternative.c:1542 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1539 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1549
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32f/0x410 kernel/jump_label.c:830
static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:774 [inline]
toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:766
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 89 da mov %rbx,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
b: 48 89 d8 mov %rbx,%rax
e: 83 e0 07 and $0x7,%eax
11: 83 c0 03 add $0x3,%eax
14: 38 d0 cmp %dl,%al
16: 7c 04 jl 0x1c
18: 84 d2 test %dl,%dl
1a: 75 19 jne 0x35
1c: 8b 03 mov (%rbx),%eax
1e: 83 e0 01 and $0x1,%eax
21: 65 ff 0d 8b 04 9f 7e decl %gs:0x7e9f048b(%rip) # 0x7e9f04b3
* 28: 74 03 je 0x2d <-- trapping instruction
2a: 5b pop %rbx
2b: 5d pop %rbp
2c: c3 retq
2d: e8 20 da 9c ff callq 0xff9cda52
32: 5b pop %rbx
33: 5d pop %rbp
34: c3 retq
35: 48 89 df mov %rbx,%rdi
38: e8 36 01 60 00 callq 0x600173
3d: eb .byte 0xeb