watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2364] Modules linked in: irq event stamp: 37782033 hardirqs last enabled at (37782032): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (37782032): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (37782033): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (37782033): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (2392): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (2398): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2364 Comm: aoe_tx0 Not tainted 6.14.0-rc3-syzkaller-ga1c24ab82279 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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 : ffff8000a14e76b0 x29: ffff8000a14e76b0 x28: ffff0000d1fb98b0 x27: dfff800000000000 x26: 0000000000000000 x25: ffff8000915d81a0 x24: ffff0000c9128f48 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000915d81a0 x20: ffff800097afe860 x19: 0000000000000000 x18: ffff8000a14e7360 x17: 000000000003b9a0 x16: ffff8000804684b8 x15: 0000000000000001 x14: 1ffff00012f5fd0c x13: ffff8000a14e8000 x12: 0000000000000003 x11: 0000000000000202 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800084023d6c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000002 x1 : ffff80008b87a540 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+0x4b0/0x9b4 drivers/tty/serial/serial_core.c:628 handle_tx+0x200/0x604 drivers/net/caif/caif_serial.c:236 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:282 __netdev_start_xmit include/linux/netdevice.h:5150 [inline] netdev_start_xmit include/linux/netdevice.h:5159 [inline] xmit_one net/core/dev.c:3735 [inline] dev_hard_start_xmit+0x274/0x904 net/core/dev.c:3751 __dev_queue_xmit+0x1680/0x35b4 net/core/dev.c:4584 dev_queue_xmit include/linux/netdevice.h:3311 [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: 8 Comm: kworker/0:0 Not tainted 6.14.0-rc3-syzkaller-ga1c24ab82279 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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 : ffff800097d073e0 x29: ffff800097d074a0 x28: 1fffe00019180f20 x27: dfff800000000000 x26: 1ffff00012fa0ea8 x25: ffff800097d07420 x24: dfff800000000000 x23: ffff800097d07460 x22: ffff700012fa0e84 x21: 0000000000000001 x20: 1ffff00012fa0e8c x19: ffff0000c8c07900 x18: ffff800097d072e0 x17: 000000000003bb99 x16: ffff800080bf9c60 x15: 0000000000000001 x14: 1fffe00019180f20 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600019180f21 x10: 1fffe00019180f20 x9 : 0000000000000000 x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80008b7e79a0 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:4590 [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:4674 [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:1675 dev_close_many+0x1e0/0x474 net/core/dev.c:1713 dev_close+0x174/0x250 net/core/dev.c:1739 ser_release+0x188/0x238 drivers/net/caif/caif_serial.c:309 process_one_work+0x810/0x1638 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3398 kthread+0x65c/0x7b0 kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862