watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [kworker/0:3:4089] Modules linked in: irq event stamp: 275903 hardirqs last enabled at (275902): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline] hardirqs last enabled at (275902): [] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91 hardirqs last disabled at (275903): [] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227 softirqs last enabled at (271298): [] spin_unlock_bh include/linux/spinlock.h:408 [inline] softirqs last enabled at (271298): [] clusterip_netdev_event+0x37c/0x3a4 net/ipv4/netfilter/ipt_CLUSTERIP.c:233 softirqs last disabled at (271300): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18 CPU: 0 PID: 4089 Comm: kworker/0:3 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 : ffff80001ffd75a0 x29: ffff80001ffd7640 x28: 1ffff00003ffaec0 x27: 1fffe0001810c791 x26: dfff800000000000 x25: ffff700003ffaeb8 x24: ffff80001ffd75c0 x23: 1fffe0001810c790 x22: ffff80001ffd7600 x21: 0000000000000001 x20: 0000000000000001 x19: ffff0000c0863c80 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000083052d8 x15: 0000000000000013 x14: 1ffff0000295806a x13: dfff800000000000 x12: 0000000000000001 x11: 1fffe0001810c790 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000101 x7 : ffff8000100bc37c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 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