watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [aoe_tx0:2416] Modules linked in: irq event stamp: 66188699 hardirqs last enabled at (66188698): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (66188698): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (66188699): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (66188699): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (1438): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1444): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 0 UID: 0 PID: 2416 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 : ffff8000a1f676c0 x29: ffff8000a1f676c0 x28: ffff00011bbefbb0 x27: 0000000000000000 x26: ffff00011bbefb40 x25: ffff0000d99fa238 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000913b4600 x20: ffff8000978cae40 x19: 0000000000000000 x18: 1fffe0003378f088 x17: ffff80009353a000 x16: ffff80008052ac24 x15: 0000000000000001 x14: 1ffff00012f195c8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093339c28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e1c124 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008edeef84 x0 : ffff80010c542000 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6520 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : gve_handle_packet_completion+0x3c/0xaec drivers/net/ethernet/google/gve/gve_tx_dqo.c:1187 lr : gve_clean_tx_done_dqo+0x330/0x1584 drivers/net/ethernet/google/gve/gve_tx_dqo.c:-1 sp : ffff800097b57a10 x29: ffff800097b57a30 x28: ffff0000c26133c8 x27: 0000000000000000 x26: 0000000000000001 x25: ffff0000c2613300 x24: ffff800097b57b30 x23: ffff800097b57b38 x22: 0000800000000000 x21: 0000000000000001 x20: 0000000000000195 x19: 0000000000000195 x18: 00000000ffffffff x17: ffff80010c566000 x16: ffff80008052ac24 x15: 000000000000000e x14: 0000000000000000 x13: 0000000000000004 x12: 0000000000ff0100 x11: ffff0000dd5c3d00 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000dd5c3d00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff800097b57b30 x4 : ffff800097b57b38 x3 : 0000000000000195 x2 : 0000000000000001 x1 : ffff0000c2613280 x0 : ffff0000ccbc0d80 Call trace: gve_handle_packet_completion+0x3c/0xaec drivers/net/ethernet/google/gve/gve_tx_dqo.c:1187 (P) gve_clean_tx_done_dqo+0x330/0x1584 drivers/net/ethernet/google/gve/gve_tx_dqo.c:-1 gve_tx_poll_dqo+0x70/0x228 drivers/net/ethernet/google/gve/gve_tx_dqo.c:1485 gve_napi_poll_dqo+0xbc/0x3b8 drivers/net/ethernet/google/gve/gve_main.c:420 __napi_poll+0xb4/0x310 net/core/dev.c:7506 napi_poll net/core/dev.c:7569 [inline] net_rx_action+0x5f4/0xd58 net/core/dev.c:7696 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:520 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:532 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:537 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 __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) __mod_timer+0x9a0/0xd00 kernel/time/timer.c:1139 mod_timer+0x2c/0x3c kernel/time/timer.c:1195 sk_reset_timer+0x30/0xec net/core/sock.c:3608 inet_csk_reset_xmit_timer+0x10c/0x170 include/net/inet_connection_sock.h:-1 tcp_reset_xmit_timer include/net/tcp.h:1500 [inline] tcp_rearm_rto+0x21c/0x2d8 net/ipv4/tcp_input.c:3171 tcp_event_new_data_sent+0x1d0/0x3d0 net/ipv4/tcp_output.c:83 tcp_write_xmit+0x14fc/0x51a8 net/ipv4/tcp_output.c:2840 __tcp_push_pending_frames net/ipv4/tcp_output.c:3016 [inline] tcp_send_fin+0x54c/0xb08 net/ipv4/tcp_output.c:3632 __tcp_close+0x4f0/0xf10 net/ipv4/tcp.c:3183 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