watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2427] Modules linked in: irq event stamp: 66871215 hardirqs last enabled at (66871214): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (66871214): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (66871215): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (66871215): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (4464): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (4468): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2427 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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 : ffff8000a23076c0 x29: ffff8000a23076c0 x28: ffff0000f60bf070 x27: 0000000000000000 x26: ffff0000f60bf000 x25: ffff0000f6dd6238 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff80009147efc0 x20: ffff80009799ae20 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093605000 x16: ffff80008052bc24 x15: 0000000000000001 x14: 1ffff00012f335c4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093404c28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e3d860 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ee54d8e x0 : ffff80010c40c000 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:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3855 __dev_queue_xmit+0x1600/0x32a8 net/core/dev.c:4725 dev_queue_xmit include/linux/netdevice.h:3361 [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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6529 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : return_address+0x44/0x104 arch/arm64/kernel/return_address.c:36 lr : get_lock_parent_ip include/linux/ftrace.h:1093 [inline] lr : __local_bh_disable_ip+0xd0/0x1ac kernel/softirq.c:352 sp : ffff8000a2ce7800 x29: ffff8000a2ce7860 x28: ffff0000cfdffa70 x27: 1fffe00019337479 x26: dfff800000000000 x25: 3d9680008b088148 x24: 0000000000000000 x23: 1fffe00018e76001 x22: dfff800000000000 x21: ffff8000a2ce7800 x20: 1ffff0001459cf00 x19: 0000000000000001 x18: 0000000000000000 x17: 0000000000fe010c x16: ffff80008052bc24 x15: 0000000000000001 x14: 1fffe0001ba31340 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001ba31341 x10: ffff80008f0226a7 x9 : 0000000041b58ab3 x8 : 59b63314d77fb700 x7 : ffff800083111de8 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800089b07d0c x2 : 0000000000000001 x1 : 0000000000000201 x0 : 0000000000000001 Call trace: return_address+0x44/0x104 arch/arm64/kernel/return_address.c:36 (P) get_lock_parent_ip include/linux/ftrace.h:1093 [inline] __local_bh_disable_ip+0xd0/0x1ac kernel/softirq.c:352 __raw_write_lock_bh include/linux/rwlock_api_smp.h:201 [inline] _raw_write_lock_bh+0x28/0x60 kernel/locking/spinlock.c:334 sock_orphan include/net/sock.h:2084 [inline] __tcp_close+0x560/0xf10 net/ipv4/tcp.c:3191 tcp_close+0x38/0x144 net/ipv4/tcp.c:3274 inet_release+0x154/0x1d0 net/ipv4/af_inet.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xa0/0x1e4 net/socket.c:1439 __fput+0x340/0x75c fs/file_table.c:468 ____fput+0x20/0x58 fs/file_table.c:496 task_work_run+0x1dc/0x260 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x524/0x1a14 kernel/exit.c:961 do_group_exit+0x194/0x22c kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] pid_child_should_wake+0x0/0x1dc kernel/exit.c:1111 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596