watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:11:4862]
Modules linked in:
irq event stamp: 199208
hardirqs last  enabled at (199207): [<ffff800011ac0874>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (199207): [<ffff800011ac0874>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (199208): [<ffff800011ac0abc>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (195114): [<ffff8000081b6d74>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (195114): [<ffff8000081b6d74>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (195095): [<ffff8000081b6138>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (195095): [<ffff8000081b6138>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (195095): [<ffff8000081b6138>] do_softirq+0xfc/0x1b0 kernel/softirq.c:459
CPU: 0 PID: 4862 Comm: kworker/0:11 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events fqdir_free_fn
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : csd_lock_wait kernel/smp.c:440 [inline]
pc : smp_call_function_single+0x268/0x4f8 kernel/smp.c:758
lr : csd_lock_wait kernel/smp.c:440 [inline]
lr : smp_call_function_single+0x280/0x4f8 kernel/smp.c:758
sp : ffff8000209d79a0
x29: ffff8000209d7a50 x28: 1fffe000185a9369 x27: dfff800000000000
x26: ffff70000413af38 x25: ffff8000209d79f8 x24: ffff8000209d79e8
x23: ffff8000209d79e0 x22: ffff0000c2d49b48 x21: 0000000000000011
x20: ffff8000209d79e8 x19: 0000000000000000 x18: 1fffe00036831b8e
x17: 1fffe00036831b8e x16: ffff800011ac23e0 x15: ffff800014b5ef40
x14: 1ffff0000295806a x13: 0000000000000000 x12: 0000000000000001
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000011 x7 : 0000000000000011 x6 : 0000000000000000
x5 : ffff8000209d7a00 x4 : ffff8000141cf6e0 x3 : ffff80000840eb14
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:440 [inline]
 smp_call_function_single+0x268/0x4f8 kernel/smp.c:758
 rcu_barrier+0x210/0x4b0 kernel/rcu/tree.c:4078
 fqdir_free_fn+0x50/0x18c net/ipv4/inet_fragment.c:163
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 process_scheduled_works kernel/workqueue.c:2373 [inline]
 worker_thread+0xb88/0x1034 kernel/workqueue.c:2459
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870