syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:2:3320]
Modules linked in:
irq event stamp: 166659
hardirqs last  enabled at (166658): [<ffff800011b4a59c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (166658): [<ffff800011b4a59c>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (166659): [<ffff800011b4a7e4>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (162194): [<ffff800010934560>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (162194): [<ffff800010934560>] clusterip_netdev_event+0x37c/0x3a4 net/ipv4/netfilter/ipt_CLUSTERIP.c:233
softirqs last disabled at (162196): [<ffff800010150cd8>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
CPU: 0 PID: 3320 Comm: kworker/0:2 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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 : ffff8000218975a0
x29: ffff800021897640 x28: 1ffff00004312ec0 x27: 1fffe0001ccbf611
x26: dfff800000000000 x25: ffff700004312eb8 x24: ffff8000218975c0
x23: 1fffe0001ccbf610 x22: ffff800021897600 x21: 0000000000000001
x20: 0000000000000001 x19: ffff0000e65fb080 x18: ffff8000218974a0
x17: 0000000000000000 x16: ffff8000083052d8 x15: 000000000002f32b
x14: ffff8000171ee500 x13: dfff800000000000 x12: 0000000000000001
x11: 1fffe0001ccbf610 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff800008304500
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:4429 [inline]
 netif_tx_lock include/linux/netdevice.h:4514 [inline]
 netif_tx_lock_bh include/linux/netdevice.h:4523 [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+0x28c/0x3e4 net/core/dev.c:1577
 dev_close_many+0x1e0/0x468 net/core/dev.c:1615
 dev_close+0x174/0x250 net/core/dev.c:1641
 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