watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u8:6:1288]
Modules linked in:
irq event stamp: 393742
hardirqs last  enabled at (393741): [<ffff800086995b9c>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (393741): [<ffff800086995b9c>] __arm64_exit_to_kernel_mode+0x64/0x78 arch/arm64/kernel/entry-common.c:60
hardirqs last disabled at (393742): [<ffff800086991b70>] __el1_irq arch/arm64/kernel/entry-common.c:527 [inline]
hardirqs last disabled at (393742): [<ffff800086991b70>] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:543
softirqs last  enabled at (393740): [<ffff8000803121a4>] softirq_handle_end kernel/softirq.c:491 [inline]
softirqs last  enabled at (393740): [<ffff8000803121a4>] handle_softirqs+0xc28/0xd98 kernel/softirq.c:673
softirqs last disabled at (393719): [<ffff8000800204c0>] __do_softirq+0x14/0x20 kernel/softirq.c:679
CPU: 0 UID: 0 PID: 1288 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Workqueue: events_unbound toggle_allocation_gate
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:363 [inline]
pc : csd_lock kernel/smp.c:396 [inline]
pc : smp_call_function_many_cond+0x73c/0x1590 kernel/smp.c:944
lr : csd_lock_wait kernel/smp.c:363 [inline]
lr : csd_lock kernel/smp.c:396 [inline]
lr : smp_call_function_many_cond+0x754/0x1590 kernel/smp.c:944
sp : ffff800094ec77e0
x29: ffff800094ec7920 x28: ffff800088b9a968 x27: 0000000000000011
x26: dfff800000000000 x25: 1ffff0001117352d x24: 0000000000000001
x23: ffff800088b9a960 x22: ffff0001adda3aa8 x21: ffff0001adda3aa0
x20: ffff0000c5ac1538 x19: 0000000000000000 x18: 1fffe00035bac428
x17: 0000000000000003 x16: ffff800088b97000 x15: ffff800088c480e0
x14: 0000000000224533 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: ffff600035bb4756 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805bc8e4
x2 : 0000000000000000 x1 : ffff0000c5ac0000 x0 : 0000000000000000
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:233 [inline] (P)
 __cmpwait arch/arm64/include/asm/cmpxchg.h:259 [inline] (P)
 csd_lock_wait kernel/smp.c:363 [inline] (P)
 csd_lock kernel/smp.c:396 [inline] (P)
 smp_call_function_many_cond+0x73c/0x1590 kernel/smp.c:944 (P)
 smp_call_function kernel/smp.c:1043 [inline]
 kick_all_cpus_sync+0x34/0x40 kernel/smp.c:1192
 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34
 __jump_label_update+0x31c/0x344 kernel/jump_label.c:521
 jump_label_update+0x428/0x4b8 kernel/jump_label.c:909
 static_key_enable_cpuslocked+0x11c/0x220 kernel/jump_label.c:210
 static_key_enable+0x24/0x38 kernel/jump_label.c:223
 toggle_allocation_gate+0xb8/0x28c mm/kfence/core.c:902
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3560
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6847 Comm: syz.5.618 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:-1 [inline]
pc : arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline]
pc : handle_softirqs+0x1cc/0xd98 kernel/softirq.c:629
lr : handle_softirqs+0x1c8/0xd98 kernel/softirq.c:629
sp : ffff80008ebe7ef0
x29: ffff80008ebe7f80 x28: ffff0000c38a3b08 x27: ffff0000c38a3b10
x26: ffff800088b422f8 x25: 0000000000000386 x24: dfff800000000000
x23: ffff0001add9d040 x22: ffff0000c38a3b00 x21: 000000000000000a
x20: ffff800088b57040 x19: ffff0001add9d040 x18: 0000000000000000
x17: ffff800125246000 x16: ffff80008ebe0000 x15: 00000000203c3140
x14: 000000000a31b1ec x13: 0000000000000001 x12: 0000000000000003
x11: ffff80008a648e28 x10: 0000000000000003 x9 : 0000000000000000
x8 : 00000000000213ce x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801571b4
x2 : 0000000000000003 x1 : ffff0000c38a3b00 x0 : ffff800125246000
Call trace:
 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P)
 arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P)
 handle_softirqs+0x1cc/0xd98 kernel/softirq.c:629 (P)
 __do_softirq+0x14/0x20 kernel/softirq.c:679
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78
 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83
 invoke_softirq kernel/softirq.c:526 [inline]
 __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:758
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:775
 __el1_irq arch/arm64/kernel/entry-common.c:531 [inline]
 el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:543
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:548
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:586