syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:2:1534]
Modules linked in:
irq event stamp: 175719
hardirqs last  enabled at (175718): [<ffff800011b5913c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (175718): [<ffff800011b5913c>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (175719): [<ffff800011b59384>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (171630): [<ffff80001093e0e0>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (171630): [<ffff80001093e0e0>] clusterip_netdev_event+0x380/0x3a8 net/ipv4/netfilter/ipt_CLUSTERIP.c:233
softirqs last disabled at (171632): [<ffff80001015984c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
CPU: 0 PID: 1534 Comm: kworker/0:2 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events ser_release
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
lr : queued_spin_lock_slowpath+0x16c/0x938 kernel/locking/qspinlock.c:382
sp : ffff800023d675a0
x29: ffff800023d67640 x28: 1ffff000047acec0 x27: 1fffe0001ab69511
x26: dfff800000000000 x25: ffff7000047aceb8 x24: ffff800023d675c0
x23: 1fffe0001ab69510 x22: ffff800023d67600 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000d5b4a880 x18: ffff800023d674a0
x17: 0000000000000000 x16: ffff800008305acc x15: 000000000002486b
x14: 00000000b5b3edcb x13: dfff800000000000 x12: 0000000000000001
x11: 1fffe0001ab69510 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000179a2dc0 x4 : 0000000000000008 x3 : ffff800008304cf4
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]
 queued_spin_lock_slowpath+0x160/0x938 kernel/locking/qspinlock.c:382
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x334/0x35c kernel/locking/spinlock_debug.c:115
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0xb8/0x10c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 __netif_tx_lock include/linux/netdevice.h:4437 [inline]
 netif_tx_lock include/linux/netdevice.h:4522 [inline]
 netif_tx_lock_bh include/linux/netdevice.h:4531 [inline]
 dev_watchdog_down net/sched/sch_generic.c:511 [inline]
 dev_deactivate_many+0x2f8/0xbe4 net/sched/sch_generic.c:1302
 __dev_close_many+0x290/0x3e8 net/core/dev.c:1608
 dev_close_many+0x1e0/0x46c net/core/dev.c:1646
 dev_close+0x174/0x250 net/core/dev.c:1672
 ser_release+0x188/0x238 drivers/net/caif/caif_serial.c:309
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870