watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [aoe_tx0:2407] Modules linked in: irq event stamp: 29107127 hardirqs last enabled at (29107126): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (29107126): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (29107127): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (29107127): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (8302): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (8306): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2407 Comm: aoe_tx0 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] pc : _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] lr : _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 sp : ffff8000a19876a0 x29: ffff8000a19876a0 x28: ffff0000d344d430 x27: 0000000000000000 x26: ffff0000d344d3c0 x25: ffff0000d3dd8238 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff800091212840 x20: ffff800097716160 x19: 0000000000000000 x18: 1fffe000337d6476 x17: ffff800093376000 x16: ffff80008051f01c x15: 0000000000000001 x14: 1ffff00012ee2c2c x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093175c08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083d695e4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ec5712e x0 : ffff80010c8e2000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 (P) spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline] uart_port_unlock_deref+0x108/0x2ec drivers/tty/serial/serial_core.c:91 uart_write_room+0xa4/0x15c drivers/tty/serial/serial_core.c:650 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:69 handle_tx+0x128/0x5fc drivers/net/caif/caif_serial.c:212 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:268 __netdev_start_xmit include/linux/netdevice.h:5215 [inline] netdev_start_xmit include/linux/netdevice.h:5224 [inline] xmit_one net/core/dev.c:3830 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3846 __dev_queue_xmit+0x15a4/0x31f0 net/core/dev.c:4713 dev_queue_xmit include/linux/netdevice.h:3355 [inline] tx+0x9c/0x1cc drivers/block/aoe/aoenet.c:62 kthread+0x164/0x354 drivers/block/aoe/aoecmd.c:1241 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events ser_release pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x138/0xaec kernel/locking/qspinlock.c:197 lr : queued_spin_lock_slowpath+0x144/0xaec kernel/locking/qspinlock.c:197 sp : ffff800097a87440 x29: ffff800097a874e0 x28: 1fffe0001aa26a29 x27: 1fffe0001833e7a2 x26: ffff0000c19f3d00 x25: dfff800000000000 x24: ffff700012f50e8c x23: 0000000000000001 x22: ffff0000c19f3d10 x21: ffff0000d5135148 x20: ffff0000d5135150 x19: ffff0000d5135140 x18: 1fffe000337d1c76 x17: ffff80008043d584 x16: ffff80008052b1e4 x15: 0000000000000001 x14: 1fffe0001aa26a28 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001aa26a29 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000893e3b04 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008af23ff4 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) queued_spin_lock_slowpath+0x138/0xaec kernel/locking/qspinlock.c:197 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2a8/0x2cc kernel/locking/spinlock_debug.c:116 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __netif_tx_lock include/linux/netdevice.h:4651 [inline] netif_freeze_queues net/sched/sch_generic.c:461 [inline] netif_tx_lock+0x9c/0x1d8 net/sched/sch_generic.c:470 netif_tx_lock_bh include/linux/netdevice.h:4736 [inline] netdev_watchdog_down net/sched/sch_generic.c:570 [inline] dev_deactivate_many+0x274/0xabc net/sched/sch_generic.c:1368 __dev_close_many+0x238/0x704 net/core/dev.c:1740 dev_close_many+0x1e8/0x448 net/core/dev.c:1781 netif_close+0x148/0x1f8 net/core/dev.c:1798 dev_close+0xf8/0x1e4 net/core/dev_api.c:220 ser_release+0x150/0x1ec drivers/net/caif/caif_serial.c:295 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844