watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2416] Modules linked in: irq event stamp: 69039295 hardirqs last enabled at (69039294): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (69039294): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (69039295): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (69039295): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (1048): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1052): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 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 : ffff8000a25e76a0 x29: ffff8000a25e76a0 x28: ffff0000f2ccaa70 x27: 0000000000000000 x26: ffff0000f2ccaa00 x25: ffff0000d5070238 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 : 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) __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: 6485 Comm: sshd-session Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : fast_dput+0x108/0x3a8 fs/dcache.c:828 lr : spin_lock include/linux/spinlock.h:351 [inline] lr : fast_dput+0xfc/0x3a8 fs/dcache.c:827 sp : ffff8000a06f7440 x29: ffff8000a06f7440 x28: 1ffff000140deeb9 x27: dfff800000000000 x26: 0000000000008000 x25: ffff0000c18f71a0 x24: 0000000000000000 x23: 1fffe00019edb0ac x22: dfff800000000000 x21: ffff8000a06f7878 x20: ffff0000cf6d8560 x19: ffff0000cf6d8468 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800080535714 x15: ffff7000140dee70 x14: 1ffff000140dee70 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff7000140dee70 x10: dfff800000000000 x9 : f5606321e316c300 x8 : 0000000000000000 x7 : ffff800080dc1f40 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008053582c x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: fast_dput+0x108/0x3a8 fs/dcache.c:828 (P) dput+0xd8/0x290 fs/dcache.c:905 __traverse_mounts+0x2b4/0x4cc fs/namei.c:1484 traverse_mounts fs/namei.c:1529 [inline] handle_mounts fs/namei.c:1632 [inline] step_into+0x1d4/0xafc fs/namei.c:1967 walk_component fs/namei.c:2135 [inline] link_path_walk+0x61c/0xc98 fs/namei.c:2497 path_lookupat+0x90/0x3d0 fs/namei.c:2653 filename_lookup+0x1ac/0x454 fs/namei.c:2683 kern_path+0x48/0x6c fs/namei.c:2816 unix_find_bsd net/unix/af_unix.c:1236 [inline] unix_find_other+0x154/0x9c8 net/unix/af_unix.c:1298 unix_dgram_connect+0x29c/0xa54 net/unix/af_unix.c:1554 __sys_connect_file net/socket.c:2086 [inline] __sys_connect+0x2a0/0x3ac net/socket.c:2105 __do_sys_connect net/socket.c:2111 [inline] __se_sys_connect net/socket.c:2108 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2108 __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