watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:3:4414]
Modules linked in:
irq event stamp: 96015
hardirqs last  enabled at (96014): [<ffff800011bb47dc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last  enabled at (96014): [<ffff800011bb47dc>] exit_to_kernel_mode+0xcc/0xfc arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (96015): [<ffff800011bb2924>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (96015): [<ffff800011bb2924>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (91832): [<ffff8000108475cc>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (91832): [<ffff8000108475cc>] clusterip_netdev_event+0x394/0x3bc net/ipv4/netfilter/ipt_CLUSTERIP.c:233
softirqs last disabled at (91834): [<ffff8000100a25e4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 1 PID: 4414 Comm: kworker/1:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Workqueue: events ser_release
pstate: 02400005 (nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x138/0xc14 kernel/locking/qspinlock.c:383
lr : queued_spin_lock_slowpath+0x144/0xc14 kernel/locking/qspinlock.c:383
sp : ffff8000213d75c0
x29: ffff8000213d7660 x28: ffff800015314008 x27: 1fffe0001b542f19
x26: 0000000000000000 x25: ffff8000213d75e0 x24: 1fffe0001b542f1a
x23: dfff800000000000 x22: ffff70000427aebc x21: ffff0000daa178c8
x20: ffff0000daa178d0 x19: ffff0000daa178c0 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082f287c x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe0001b542f18 x12: 0000000000000000
x11: 0000000000000000 x10: ffff60001b542f19 x9 : 0000000000000000
x8 : 0000000000000101 x7 : ffff8000100973e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800011c9e9f8
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+0x138/0xc14 kernel/locking/qspinlock.c:383
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x2f4/0x2f8 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:4342 [inline]
 netif_freeze_queues net/sched/sch_generic.c:462 [inline]
 netif_tx_lock+0xa8/0x1e0 net/sched/sch_generic.c:471
 netif_tx_lock_bh include/linux/netdevice.h:4426 [inline]
 dev_watchdog_down net/sched/sch_generic.c:576 [inline]
 dev_deactivate_many+0x26c/0xa84 net/sched/sch_generic.c:1338
 __dev_close_many+0x248/0x3a0 net/core/dev.c:1572
 dev_close_many+0x1e8/0x448 net/core/dev.c:1610
 dev_close+0x150/0x208 net/core/dev.c:1636
 ser_release+0x16c/0x238 drivers/net/caif/caif_serial.c:311
 process_one_work+0x7e4/0x13bc kernel/workqueue.c:2292
 worker_thread+0x8cc/0xfe8 kernel/workqueue.c:2439
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850