watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [aoe_tx0:2411] Modules linked in: irq event stamp: 73293691 hardirqs last enabled at (73293690): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (73293690): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (73293691): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (73293691): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (2926): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (2930): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 0 UID: 0 PID: 2411 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 : ffff8000a1c276d0 x29: ffff8000a1c276d0 x28: ffff0000fbb7b7f0 x27: 0000000000000000 x26: ffff0000fbb7b780 x25: ffff0000fbb7b858 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000913a3f00 x20: ffff8000978b4dc0 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093524000 x16: ffff800080529624 x15: 0000000000000001 x14: 1ffff00012f169b8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093323be8 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e16f80 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008eddb42c x0 : ffff80010c595000 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:629 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: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: 6514 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 : ___slab_alloc+0x218/0xf1c mm/slub.c:3826 lr : ___slab_alloc+0x20c/0xf1c mm/slub.c:3787 sp : ffff8000a4386ab0 x29: ffff8000a4386b10 x28: 0000000000000000 x27: 0000000000000820 x26: ffff8000975bbac8 x25: 00000000ffffffff x24: ffff8000892e78d8 x23: 0000000000000000 x22: 0000000000000001 x21: ffff80008f743510 x20: ffff00019bcfc510 x19: ffff0000c18c3dc0 x18: 00000000ffffffff x17: ffff800093524000 x16: ffff800080529624 x15: ffff800093323000 x14: ffff0000c8bd6610 x13: ffff800093323be8 x12: ffff0000c8bd6630 x11: ffff800093323be8 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800080bd6f60 x6 : 0000000000000000 x5 : 0000000000000020 x4 : fffffdffc45033e0 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008eddb42c x0 : ffff80010c5b9000 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) ___slab_alloc+0x218/0xf1c mm/slub.c:3787 (P) __slab_alloc+0x74/0xd0 mm/slub.c:3992 __slab_alloc_node mm/slub.c:4067 [inline] slab_alloc_node mm/slub.c:4228 [inline] kmem_cache_alloc_noprof+0x2e0/0x3e8 mm/slub.c:4247 skb_clone+0x1b4/0x328 net/core/skbuff.c:2049 dev_queue_xmit_nit+0x3a8/0xadc net/core/dev.c:2554 xmit_one net/core/dev.c:3835 [inline] dev_hard_start_xmit+0x16c/0x890 net/core/dev.c:3855 sch_direct_xmit+0x1fc/0x468 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4114 [inline] __dev_queue_xmit+0x1410/0x32a8 net/core/dev.c:4691 dev_queue_xmit include/linux/netdevice.h:3361 [inline] neigh_hh_output include/net/neighbour.h:531 [inline] neigh_output include/net/neighbour.h:545 [inline] ip_finish_output2+0xd80/0x1240 net/ipv4/ip_output.c:235 __ip_finish_output+0x1b0/0x44c net/ipv4/ip_output.c:-1 ip_finish_output+0x44/0x304 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0x264/0x384 net/ipv4/ip_output.c:436 dst_output include/net/dst.h:461 [inline] ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0xdd0/0x1740 net/ipv4/ip_output.c:532 ip_queue_xmit+0x5c/0x7c net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x17f8/0x2e68 net/ipv4/tcp_output.c:1479 tcp_transmit_skb net/ipv4/tcp_output.c:1497 [inline] tcp_write_xmit+0x14d8/0x51a8 net/ipv4/tcp_output.c:2833 __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+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596