kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u4:2:43]
Modules linked in:
CPU: 1 PID: 43 Comm: kworker/u4:2 Not tainted 6.1.134-syzkaller-00012-g646380b087a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x872/0x960 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 39 66 09 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 05 62 09 00 e9 38 ff ff ff f3 90 <41> 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff
RSP: 0000:ffffc900002cf840 EFLAGS: 00000293
RAX: ffffffff816684ee RBX: dffffc0000000000 RCX: ffff888100262880
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900002cf978 R08: dffffc0000000000 R09: ffffed103ee271fb
R10: 0000000000000000 R11: ffffffff81341390 R12: 1ffff1103ee271f8
R13: 1ffff1103ee07a99 R14: 0000000000000000 R15: ffff8881f703d4c8
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d91bff8 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
text_poke_bp_batch+0x1cc/0x580 arch/x86/kernel/alternative.c:1534
text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1732
arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
__jump_label_update+0x37c/0x3a0 kernel/jump_label.c:451
jump_label_update+0x39b/0x450 kernel/jump_label.c:797
static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:173
static_key_enable+0x1a/0x30 kernel/jump_label.c:186
toggle_allocation_gate+0xb4/0x400 mm/kfence/core.c:805
process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6142 Comm: syz.2.1952 Not tainted 6.1.134-syzkaller-00012-g646380b087a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline]
RIP: 0010:kvm_wait+0xcc/0x140 arch/x86/kernel/kvm.c:1058
Code: 20 f6 44 24 21 02 75 24 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 48 0f b6 07 40 38 f0 75 a6 66 90 0f 00 2d 15 b7 13 04 f4 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07
RSP: 0018:ffffc90000ad6ec0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881f70279c0 RCX: ffffffff84efb682
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881f70279c0
RBP: ffffc90000ad6f50 R08: dffffc0000000000 R09: ffffed103ee04f39
R10: ffffed103ee04f39 R11: 1ffff1103ee04f38 R12: 1ffff1103ee00001
R13: ffff8881f7038bd4 R14: dffffc0000000000 R15: 1ffff9200015add8
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555946504a8 CR3: 000000012f7d7000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
do_raw_spin_lock include/linux/spinlock.h:187 [inline]
__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
_raw_spin_lock+0xd8/0xe0 kernel/locking/spinlock.c:154
krc_this_cpu_lock kernel/rcu/tree.c:3035 [inline]
add_ptr_to_bulk_krc_lock kernel/rcu/tree.c:3355 [inline]
kvfree_call_rcu+0x100/0x7a0 kernel/rcu/tree.c:3446
trie_delete_elem+0x572/0x720 kernel/bpf/lpm_trie.c:545
bpf_prog_5186c38a4019a4cb+0x42/0x46
bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline]
__bpf_prog_run include/linux/filter.h:603 [inline]
bpf_prog_run include/linux/filter.h:610 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2282 [inline]
bpf_trace_run3+0x113/0x270 kernel/trace/bpf_trace.c:2322
__bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:53
trace_timer_start include/trace/events/timer.h:53 [inline]
enqueue_timer+0x337/0x480 kernel/time/timer.c:615
__mod_timer+0x79f/0xb30 kernel/time/timer.c:-1
add_timer+0x68/0x80 kernel/time/timer.c:1218
__queue_delayed_work+0x173/0x200 kernel/workqueue.c:1686
mod_delayed_work_on+0x74/0xe0 kernel/workqueue.c:1749
mod_delayed_work include/linux/workqueue.h:540 [inline]
schedule_delayed_monitor_work kernel/rcu/tree.c:3213 [inline]
kvfree_call_rcu+0x560/0x7a0 kernel/rcu/tree.c:3472
drop_sysctl_table+0x2ef/0x410 fs/proc/proc_sysctl.c:1727
unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1765
unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:175
neigh_sysctl_unregister+0x78/0x90 net/core/neighbour.c:3871
devinet_sysctl_unregister net/ipv4/devinet.c:2665 [inline]
inetdev_destroy net/ipv4/devinet.c:329 [inline]
inetdev_event+0x860/0x10e0 net/ipv4/devinet.c:1616
notifier_call_chain kernel/notifier.c:87 [inline]
raw_notifier_call_chain+0xa1/0x110 kernel/notifier.c:455
call_netdevice_notifiers_info net/core/dev.c:2009 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2047 [inline]
call_netdevice_notifiers net/core/dev.c:2061 [inline]
unregister_netdevice_many+0xf8f/0x1820 net/core/dev.c:10939
unregister_netdevice_queue+0x31c/0x360 net/core/dev.c:10870
unregister_netdevice include/linux/netdevice.h:3108 [inline]
__tun_detach+0xca6/0x1460 drivers/net/tun.c:685
tun_detach drivers/net/tun.c:701 [inline]
tun_chr_close+0x92/0x140 drivers/net/tun.c:3492
__fput+0x1fc/0x8f0 fs/file_table.c:320
____fput+0x15/0x20 fs/file_table.c:348
task_work_run+0x1db/0x240 kernel/task_work.c:203
exit_task_work include/linux/task_work.h:39 [inline]
do_exit+0xa1d/0x2650 kernel/exit.c:877
__do_sys_exit kernel/exit.c:994 [inline]
__se_sys_exit kernel/exit.c:992 [inline]
__x64_sys_exit+0x40/0x40 kernel/exit.c:992
x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f06d798e969
Code: Unable to access opcode bytes at 0x7f06d798e93f.
RSP: 002b:00007f06d87f4fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f06d7bb6240 RCX: 00007f06d798e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f06d7a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f06d7bb6240 R15: 00007ffd5ec01de8