watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2366] Modules linked in: irq event stamp: 38552935 hardirqs last enabled at (38552934): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (38552934): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (38552935): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (38552935): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (2244): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (2248): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2366 Comm: aoe_tx0 Not tainted 6.14.0-rc6-syzkaller-g059f6cbcfa70 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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 : ffff8000a2447680 x29: ffff8000a2447680 x28: ffff80008fbc0000 x27: 0000000000000000 x26: 0000000000000000 x25: dfff800000000000 x24: 0000000000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000915d8f20 x20: ffff800097b00900 x19: 0000000000000000 x18: ffff8000a2447360 x17: 0000000000043b92 x16: ffff800080468720 x15: 0000000000000001 x14: 1ffff00012f60120 x13: ffff8000a2448000 x12: 0000000000000003 x11: 0000000000000202 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff80008402709c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000002 x1 : ffff80008b87a5a0 x0 : ffff800123ca8000 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:786 [inline] uart_write_room+0x320/0x71c drivers/tty/serial/serial_core.c:649 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:69 handle_tx+0x120/0x604 drivers/net/caif/caif_serial.c:226 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:282 __netdev_start_xmit include/linux/netdevice.h:5151 [inline] netdev_start_xmit include/linux/netdevice.h:5160 [inline] xmit_one net/core/dev.c:3800 [inline] dev_hard_start_xmit+0x274/0x904 net/core/dev.c:3816 __dev_queue_xmit+0x1680/0x35b4 net/core/dev.c:4649 dev_queue_xmit include/linux/netdevice.h:3313 [inline] tx+0x9c/0x1cc drivers/block/aoe/aoenet.c:62 kthread+0x1ac/0x374 drivers/block/aoe/aoecmd.c:1237 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted 6.14.0-rc6-syzkaller-g059f6cbcfa70 #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/0xd04 kernel/locking/qspinlock.c:380 lr : queued_spin_lock_slowpath+0x168/0xd04 kernel/locking/qspinlock.c:380 sp : ffff800097d173e0 x29: ffff800097d174a0 x28: 1fffe0001b37b1a0 x27: dfff800000000000 x26: 1ffff00012fa2ea8 x25: ffff800097d17420 x24: dfff800000000000 x23: ffff800097d17460 x22: ffff700012fa2e84 x21: 0000000000000001 x20: 1ffff00012fa2e8c x19: ffff0000d9bd8d00 x18: ffff800097d172e0 x17: 0000000000043fd7 x16: ffff800080bf6fe8 x15: 0000000000000001 x14: 1fffe0001b37b1a0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b37b1a1 x10: 1fffe0001b37b1a0 x9 : 0000000000000000 x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80008b7edb20 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+0x15c/0xd04 kernel/locking/qspinlock.c:380 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2ec/0x334 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:4591 [inline] netif_freeze_queues net/sched/sch_generic.c:460 [inline] netif_tx_lock+0x9c/0x1d8 net/sched/sch_generic.c:469 netif_tx_lock_bh include/linux/netdevice.h:4675 [inline] netdev_watchdog_down net/sched/sch_generic.c:569 [inline] dev_deactivate_many+0x2d0/0xb70 net/sched/sch_generic.c:1367 __dev_close_many+0x270/0x408 net/core/dev.c:1706 dev_close_many+0x1e0/0x474 net/core/dev.c:1744 dev_close+0x174/0x250 net/core/dev.c:1770 ser_release+0x188/0x238 drivers/net/caif/caif_serial.c:309 process_one_work+0x810/0x1638 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3400 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862