watchdog: BUG: soft lockup - CPU#0 stuck for 28s! [kworker/u4:0:9]
Modules linked in:
irq event stamp: 4877600
hardirqs last  enabled at (4877599): [<ffff800011b8d07c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (4877599): [<ffff800011b8d07c>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (4877600): [<ffff800011b8b1c4>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (4877600): [<ffff800011b8b1c4>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (4857882): [<ffff8000081ae3b4>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (4857882): [<ffff8000081ae3b4>] handle_softirqs+0xb1c/0xc90 kernel/softirq.c:624
softirqs last disabled at (4857823): [<ffff800008020e6c>] __do_softirq+0x14/0x20 kernel/softirq.c:630
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Workqueue: events_unbound toggle_allocation_gate
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:424 [inline]
pc : smp_call_function_many_cond+0xeac/0x1404 kernel/smp.c:998
lr : csd_lock_wait kernel/smp.c:424 [inline]
lr : smp_call_function_many_cond+0xec4/0x1404 kernel/smp.c:998
sp : ffff80001cb37880
x29: ffff80001cb378d0 x28: dfff800000000000 x27: 0000000000000000
x26: ffff80001537d000 x25: 0000000000000011 x24: ffff800015380f40
x23: ffff00019f3a83c0 x22: 1fffe00033e75078 x21: ffff00019f3cdc08
x20: 0000000000000001 x19: ffff80001557a720 x18: 1fffe00033e7277e
x17: 0000000000000000 x16: ffff800011b8ee98 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe00033e79b81 x12: 0000000000000000
x11: ff0080000840e438 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000840e42c
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 csd_lock_wait kernel/smp.c:424 [inline]
 smp_call_function_many_cond+0xeac/0x1404 kernel/smp.c:998
 smp_call_function_many kernel/smp.c:1021 [inline]
 smp_call_function kernel/smp.c:1043 [inline]
 kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1189
 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34
 __jump_label_update+0x314/0x33c kernel/jump_label.c:518
 jump_label_update+0x310/0x3c4 kernel/jump_label.c:864
 static_key_enable_cpuslocked+0x11c/0x220 kernel/jump_label.c:207
 static_key_enable+0x24/0x38 kernel/jump_label.c:220
 toggle_allocation_gate+0xc8/0x42c mm/kfence/core.c:821
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850