watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u8:8:4899]
Modules linked in:
irq event stamp: 1069094
hardirqs last  enabled at (1069093): [<ffff800086832420>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (1069093): [<ffff800086832420>] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62
hardirqs last disabled at (1069094): [<ffff80008682e430>] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline]
hardirqs last disabled at (1069094): [<ffff80008682e430>] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522
softirqs last  enabled at (1069092): [<ffff80008030c57c>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (1069092): [<ffff80008030c57c>] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650
softirqs last disabled at (1069011): [<ffff8000800204b0>] __do_softirq+0x14/0x20 kernel/softirq.c:656
CPU: 0 UID: 0 PID: 4899 Comm: kworker/u8:8 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Workqueue: events_unbound toggle_allocation_gate
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:342 [inline]
pc : smp_call_function_many_cond+0xfd0/0x1640 kernel/smp.c:892
lr : csd_lock_wait kernel/smp.c:342 [inline]
lr : smp_call_function_many_cond+0xfe8/0x1640 kernel/smp.c:892
sp : ffff8000926577e0
x29: ffff8000926578d0 x28: 0000000000000011 x27: 0000000000000001
x26: ffff0001adf72780 x25: ffff800088a0f680 x24: ffffffffffffffff
x23: 1fffe00035bee4f0 x22: dfff800000000000 x21: 1fffe00035bee4f1
x20: ffff0001adf72788 x19: ffff0001adf9c0a8 x18: 1fffe00035beb820
x17: 0000000000000003 x16: ffff800088a0b000 x15: ffff800088abda60
x14: ffff0001adf5c10c x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: ffff600035bf3816 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a8f60
x2 : 0000000000000000 x1 : ffff0000c944ba00 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:342 [inline] (P)
 smp_call_function_many_cond+0xfd0/0x1640 kernel/smp.c:892 (P)
 smp_call_function_many kernel/smp.c:915 [inline]
 smp_call_function+0x58/0xbc kernel/smp.c:935
 kick_all_cpus_sync+0x28/0x34 kernel/smp.c:1081
 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:910
 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:906
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3397
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3478
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 4337 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : exit_creds+0x48/0x218 kernel/cred.c:98
lr : exit_creds+0x28/0x218 kernel/cred.c:91
sp : ffff80008ea27cf0
x29: ffff80008ea27cf0 x28: 1fffe0001ab51741 x27: ffff000107f1b3a8
x26: ffff0000d5a8ba08 x25: dfff800000000000 x24: ffff8000802e7994
x23: dfff800000000000 x22: ffff000107f1a5c8 x21: ffff0000cce67f00
x20: ffff000107f1a630 x19: ffff000107f19d00 x18: 0000000000000000
x17: ffff8001255d1000 x16: ffff80008ea20000 x15: 0000000000000000
x14: 00000000ffff8000 x13: 00000000b46bcd79 x12: ffff8000800204b0
x11: ffff80008a47fd08 x10: 0000000000000003 x9 : 0000000000000100
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000008 x3 : ffff8000801563fc
x2 : 0000000000000003 x1 : ffff0000d5a8ba00 x0 : 0000000000000000
Call trace:
 exit_creds+0x48/0x218 kernel/cred.c:97 (P)
 __put_task_struct+0x118/0x234 kernel/fork.c:789
 __put_task_struct_rcu_cb+0x24/0x34 kernel/fork.c:801
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x598/0xf04 kernel/rcu/tree.c:2869
 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2886
 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622