watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u4:18:6634]
Modules linked in:
irq event stamp: 6101912
hardirqs last  enabled at (6101911): [<ffff800011a3aa5c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (6101911): [<ffff800011a3aa5c>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (6101912): [<ffff800011a38ba4>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (6101912): [<ffff800011a38ba4>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (6094214): [<ffff800011702910>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (6094214): [<ffff800011702910>] batadv_nc_purge_paths+0x2f0/0x378 net/batman-adv/network-coding.c:471
softirqs last disabled at (6094212): [<ffff8000117026f0>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (6094212): [<ffff8000117026f0>] batadv_nc_purge_paths+0xd0/0x378 net/batman-adv/network-coding.c:442
CPU: 1 PID: 6634 Comm: kworker/u4:18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0x1358/0x142c kernel/smp.c:998
lr : csd_lock_wait kernel/smp.c:424 [inline]
lr : smp_call_function_many_cond+0x1370/0x142c kernel/smp.c:998
sp : ffff800021117830
x29: ffff800021117890 x28: 0000000000000000 x27: ffff80001521d000
x26: 0000000000000011 x25: ffff800015220f40 x24: ffff00019f5671c0
x23: 1fffe00033eace38 x22: dfff800000000000 x21: ffff00019f54c348
x20: 0000000000000000 x19: ffff80001541a4a0 x18: ffff800011b9bf60
x17: 0000000000000000 x16: ffff8000082d93d8 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe00033ea9869 x12: 0000000000ff0100
x11: ff00800008408b64 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff800008408b58
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+0x1358/0x142c 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+0x30c/0x334 kernel/jump_label.c:518
 jump_label_update+0x304/0x3b4 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+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850