watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [aoe_tx0:2466] Modules linked in: irq event stamp: 65748907 hardirqs last enabled at (65748906): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (65748906): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (65748907): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:42 softirqs last enabled at (1150): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1154): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 0 UID: 0 PID: 2466 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (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 : ffff8000a1987730 x29: ffff8000a1987730 x28: ffff000137efe6b0 x27: 0000000000000000 x26: ffff000137efe640 x25: ffff000137efe718 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000914d0160 x20: ffff80009794c8e0 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093598000 x16: ffff80008053826c x15: 0000000000000001 x14: 1ffff00012f2991c x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083bc188c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ee5b741 x0 : ffff80010c42d000 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+0xc4/0x130 drivers/tty/serial/serial_core.c:626 handle_tx+0x200/0x5fc drivers/net/caif/caif_serial.c:222 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:268 __netdev_start_xmit include/linux/netdevice.h:5273 [inline] netdev_start_xmit include/linux/netdevice.h:5282 [inline] xmit_one net/core/dev.c:3853 [inline] dev_hard_start_xmit+0x298/0x890 net/core/dev.c:3869 __dev_queue_xmit+0x10c4/0x2a68 net/core/dev.c:4817 dev_queue_xmit include/linux/netdevice.h:3381 [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:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6558 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : stack_trace_consume_entry+0xe0/0x208 kernel/stacktrace.c:93 lr : arch_kunwind_consume_entry arch/arm64/kernel/stacktrace.c:378 [inline] lr : do_kunwind arch/arm64/kernel/stacktrace.c:293 [inline] lr : kunwind_stack_walk arch/arm64/kernel/stacktrace.c:366 [inline] lr : arch_stack_walk+0x1dc/0x368 arch/arm64/kernel/stacktrace.c:390 sp : ffff8000a4707530 x29: ffff8000a4707540 x28: ffff0000d0435028 x27: 1fffe0001b0f4c41 x26: 000000000021a310 x25: 0000000000000002 x24: 0000000000000003 x23: 1ffff000148e0ed9 x22: dfff800000000000 x21: ffff8000a4707760 x20: ffff8000a47076c8 x19: ffff8000a47076d0 x18: 00000000ffffffff x17: ffff800093598000 x16: ffff8000802127fc x15: 0000000000000001 x14: 00000000ffff8000 x13: 000000007c263ebe x12: ffff800080021d9c x11: 000000002454a64e x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : fffffffffffffff0 x3 : 0000000000000010 x2 : ffff8000a4707980 x1 : ffff800080c04b74 x0 : ffff8000a47076c0 Call trace: stack_trace_consume_entry+0xe0/0x208 kernel/stacktrace.c:93 (P) arch_kunwind_consume_entry arch/arm64/kernel/stacktrace.c:378 [inline] do_kunwind arch/arm64/kernel/stacktrace.c:293 [inline] kunwind_stack_walk arch/arm64/kernel/stacktrace.c:366 [inline] arch_stack_walk+0x1dc/0x368 arch/arm64/kernel/stacktrace.c:390 stack_trace_save+0x94/0xd8 kernel/stacktrace.c:122 kasan_save_stack+0x40/0x6c mm/kasan/common.c:56 kasan_record_aux_stack+0xb0/0xc8 mm/kasan/generic.c:556 slab_free_hook mm/slub.c:2501 [inline] slab_free mm/slub.c:6668 [inline] kmem_cache_free+0x4b4/0x6e4 mm/slub.c:6779 file_free+0x148/0x208 fs/file_table.c:-1 __fput+0x540/0x75c fs/file_table.c:481 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x52c/0x1a1c kernel/exit.c:971 do_group_exit+0x194/0x22c kernel/exit.c:1112 __do_sys_exit_group kernel/exit.c:1123 [inline] __se_sys_exit_group kernel/exit.c:1121 [inline] pid_child_should_wake+0x0/0x1dc kernel/exit.c:1121 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596