syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kworker/0:3:4342]
Modules linked in:
irq event stamp: 170235
hardirqs last  enabled at (170234): [<ffff800012326da0>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (170234): [<ffff800012326da0>] exit_to_kernel_mode+0xe8/0x118 arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (170235): [<ffff800012324a7c>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (170235): [<ffff800012324a7c>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (166046): [<ffff800010fa06a8>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (166046): [<ffff800010fa06a8>] clusterip_netdev_event+0x380/0x3a8 net/ipv4/netfilter/ipt_CLUSTERIP.c:233
softirqs last disabled at (166048): [<ffff8000107a0968>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 0 PID: 4342 Comm: kworker/0:3 Not tainted 6.1.133-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+0x15c/0xe48 kernel/locking/qspinlock.c:383
lr : queued_spin_lock_slowpath+0x168/0xe48 kernel/locking/qspinlock.c:383
sp : ffff800021427560
x29: ffff800021427600 x28: 1fffe0001a557118 x27: 1ffff00004284eb8
x26: dfff800000000000 x25: 1fffe0001a55711a x24: ffff800021427580
x23: ffff8000214275c0 x22: ffff700004284eb0 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000d2ab88c0 x18: ffff800021427460
x17: ffff800018c59000 x16: ffff800008975ee4 x15: ffff800018739f80
x14: ffff0000ce25a638 x13: dfff800000000000 x12: 0000000000000001
x11: 1fffe0001a557118 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80001240e414
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+0x15c/0xe48 kernel/locking/qspinlock.c:383
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x330/0x358 kernel/locking/spinlock_debug.c:115
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x5c/0x6c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 __netif_tx_lock include/linux/netdevice.h:4347 [inline]
 netif_freeze_queues net/sched/sch_generic.c:459 [inline]
 netif_tx_lock+0x9c/0x1d8 net/sched/sch_generic.c:468
 netif_tx_lock_bh include/linux/netdevice.h:4431 [inline]
 dev_watchdog_down net/sched/sch_generic.c:573 [inline]
 dev_deactivate_many+0x274/0xa8c net/sched/sch_generic.c:1362
 __dev_close_many+0x270/0x3c8 net/core/dev.c:1559
 dev_close_many+0x1e0/0x46c net/core/dev.c:1597
 dev_close+0x174/0x250 net/core/dev.c:1623
 ser_release+0x188/0x238 drivers/net/caif/caif_serial.c:309
 process_one_work+0x804/0x1484 kernel/workqueue.c:2292
 worker_thread+0x8e4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864