rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (1 GPs behind) idle=8bf/1/0x4000000000000000 softirq=7303/7317 fqs=1
(t=13210 jiffies g=7361 q=3496)
rcu: rcu_preempt kthread timer wakeup didn't happen for 9705 jiffies! g7361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=3264
rcu: rcu_preempt kthread starved for 9706 jiffies! g7361 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28888 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x90d/0x2680 kernel/sched/core.c:6304
schedule+0xd2/0x260 kernel/sched/core.c:6377
schedule_timeout+0x11d/0x250 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1963
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2136
kthread+0x299/0x340 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 44 Comm: kworker/u4:2 Not tainted 5.17.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:match_held_lock+0x70/0xc0 kernel/locking/lockdep.c:5116
Code: 06 48 0f af c2 0f b7 53 20 81 e2 ff 1f 00 00 48 39 d0 0f 94 c0 48 83 c4 08 0f b6 c0 5b c3 31 f6 e8 c5 fe ff ff 48 85 c0 75 b2 <31> c0 48 83 c4 08 5b c3 48 83 c4 08 b8 01 00 00 00 5b c3 e8 98 b9
RSP: 0018:ffffc90000007d68 EFLAGS: 00000046
RAX: 0000000000000005 RBX: ffff888011da6bc8 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8ad763a0 RDI: ffff888011da6bc8
RBP: ffffffff8ad763a0 R08: 0000000000000000 R09: ffffffff8ca4cd17
R10: fffffbfff19499a2 R11: 0000000000000001 R12: ffff888011da6180
R13: ffff888011da6ba0 R14: 00000000ffffffff R15: ffff888011da6bc8
FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1a4161a70 CR3: 000000000aa8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5380 [inline]
lock_is_held_type+0xa7/0x140 kernel/locking/lockdep.c:5682
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_lock_acquire include/trace/events/lock.h:13 [inline]
lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5610
seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline]
ktime_get_update_offsets_now+0x67/0x460 kernel/time/timekeeping.c:2296
hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
hrtimer_interrupt+0x121/0x780 kernel/time/hrtimer.c:1793
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:638
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x28e/0xa40 kernel/smp.c:969
Code: 38 d0 7c 08 84 d2 0f 85 71 05 00 00 8b 43 08 a8 01 74 2e 48 89 ca 49 89 cf 48 c1 ea 03 41 83 e7 07 4c 01 e2 41 83 c7 03 f3 90 <0f> b6 02 41 38 c7 7c 08 84 c0 0f 85 b1 04 00 00 8b 43 08 a8 01 75
RSP: 0018:ffffc90001157a58 EFLAGS: 00000202
RAX: 0000000000000011 RBX: ffff8880b9f3f360 RCX: ffff8880b9f3f368
RDX: ffffed10173e7e6d RSI: ffff8880b9e3ad88 RDI: ffffffff8a8638a8
RBP: ffff8880b9e3ad80 R08: 0000000000000001 R09: ffffffff8f0cd887
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: ffff8880b9e3ad88 R14: ffffed10173c75b0 R15: 0000000000000003
on_each_cpu_cond_mask+0x3f/0x70 kernel/smp.c:1135
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
text_poke_bp_batch+0x40f/0x700 arch/x86/kernel/alternative.c:1353
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1467 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x15f/0x220 kernel/jump_label.c:177
static_key_enable+0x11/0x20 kernel/jump_label.c:190
toggle_allocation_gate mm/kfence/core.c:735 [inline]
toggle_allocation_gate+0xe3/0x310 mm/kfence/core.c:727
process_one_work+0x879/0x1410 kernel/workqueue.c:2307
worker_thread+0x5a0/0xf60 kernel/workqueue.c:2454
kthread+0x299/0x340 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
NMI backtrace for cpu 1
CPU: 1 PID: 3653 Comm: kworker/1:6 Not tainted 5.17.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient gc_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:604 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:688 [inline]
rcu_pending kernel/rcu/tree.c:3919 [inline]
rcu_sched_clock_irq.cold+0x402/0x755 kernel/rcu/tree.c:2617
update_process_times+0x13b/0x1c0 kernel/time/timer.c:1785
tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x18a/0xb00 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x2f5/0x780 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:638
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:277 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:331 [inline]
RIP: 0010:gc_worker+0x1e6/0xde0 net/netfilter/nf_conntrack_core.c:1442
Code: 48 8b b4 24 e8 00 00 00 48 c7 c7 e8 70 a5 8c e8 f0 39 80 fa 58 9c 58 f6 c4 02 0f 85 04 08 00 00 48 85 ed 74 05 fb eb 02 f3 90 <8b> 05 24 08 d2 05 a8 01 75 f4 8b 35 56 08 d2 05 48 8b 0d 63 08 d2
RSP: 0018:ffffc90002497c48 EFLAGS: 00000206
RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 1ffffffff1e20786
RDX: 0000000000000000 RSI: ffffffff81444509 RDI: ffffffff8941bfe0
RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff8f0cd90f
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88805d692700
R13: ffffffff8aa0f180 R14: 000000000000ed83 R15: 000000000000ed83
process_one_work+0x879/0x1410 kernel/workqueue.c:2307
worker_thread+0x5a0/0xf60 kernel/workqueue.c:2454
kthread+0x299/0x340 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 0f af c2 imul %rdx,%rax
4: 0f b7 53 20 movzwl 0x20(%rbx),%edx
8: 81 e2 ff 1f 00 00 and $0x1fff,%edx
e: 48 39 d0 cmp %rdx,%rax
11: 0f 94 c0 sete %al
14: 48 83 c4 08 add $0x8,%rsp
18: 0f b6 c0 movzbl %al,%eax
1b: 5b pop %rbx
1c: c3 retq
1d: 31 f6 xor %esi,%esi
1f: e8 c5 fe ff ff callq 0xfffffee9
24: 48 85 c0 test %rax,%rax
27: 75 b2 jne 0xffffffdb
* 29: 31 c0 xor %eax,%eax <-- trapping instruction
2b: 48 83 c4 08 add $0x8,%rsp
2f: 5b pop %rbx
30: c3 retq
31: 48 83 c4 08 add $0x8,%rsp
35: b8 01 00 00 00 mov $0x1,%eax
3a: 5b pop %rbx
3b: c3 retq
3c: e8 .byte 0xe8
3d: 98 cwtl
3e: b9 .byte 0xb9