process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u8:4:64]
Modules linked in:
irq event stamp: 320306
hardirqs last  enabled at (320305): [<ffffffff8b769bfd>] irqentry_exit+0x1dd/0x8c0 kernel/entry/common.c:219
hardirqs last disabled at (320306): [<ffffffff8b76884e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (320304): [<ffffffff817dd7c9>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last  enabled at (320304): [<ffffffff817dd7c9>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last  enabled at (320304): [<ffffffff817dd7c9>] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
softirqs last disabled at (320287): [<ffffffff817dd7c9>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (320287): [<ffffffff817dd7c9>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (320287): [<ffffffff817dd7c9>] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
CPU: 1 UID: 0 PID: 64 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xdfd/0x15e0 kernel/smp.c:877
Code: 57 48 8b 54 24 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 65 5b 0c 00 f3 90 <41> 0f b6 45 00 40 38 c5 7c 08 84 c0 0f 85 b6 05 00 00 8b 43 08 31
RSP: 0018:ffffc9000214f808 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b8443020 RCX: ffffffff81b27861
RDX: ffff88801c708000 RSI: ffffffff81b2783b RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88801c708b30 R12: dffffc0000000000
R13: ffffed1017088605 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881249f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ceba1cf950 CR3: 000000000e184000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043
 on_each_cpu include/linux/smp.h:71 [inline]
 smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2711 [inline]
 smp_text_poke_batch_finish+0x27b/0xdb0 arch/x86/kernel/alternative.c:2921
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x376/0x550 kernel/jump_label.c:919
 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
 static_key_enable+0x1a/0x20 kernel/jump_label.c:223
 toggle_allocation_gate mm/kfence/core.c:874 [inline]
 toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:866
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>