watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2414] Modules linked in: irq event stamp: 65712239 hardirqs last enabled at (65712238): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (65712238): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (65712239): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (65712239): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (1112): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1116): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2414 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 : __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 lr : tty_write_room+0x24/0x8c drivers/tty/tty_ioctl.c:67 sp : ffff8000a1a07780 x29: ffff8000a1a07780 x28: ffff0000d49877f0 x27: 0000000000000000 x26: ffff0000d4987780 x25: ffff0000d3fba238 x24: ffff0000d3fbada8 x23: ffff0000d3fbadb0 x22: 0000000000000020 x21: dfff800000000000 x20: 1fffe0001a930efe x19: ffff0000fca24000 x18: 1fffe00033793888 x17: ffff80009353a000 x16: ffff80008052b424 x15: 0000000000000001 x14: 1fffe000192841f0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000192841f1 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cd0b3d00 x7 : ffff800083e1c924 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800083e1ccd4 x2 : 0000000000000001 x1 : 0000000000000020 x0 : ffff0000fca24000 Call trace: __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 (P) 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: 0 Comm: swapper/0 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 : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:50 lr : default_idle_call+0xd0/0xfc kernel/sched/idle.c:129 sp : ffff80008f767d20 x29: ffff80008f767d20 x28: 0000000000000001 x27: dfff800000000000 x26: 1ffff00011eecfac x25: 0000000000000000 x24: 0000000000000000 x23: 1ffff00011f02ba8 x22: ffff80008f7ee768 x21: 1ffff00011efdced x20: 0000000000000000 x19: ffff8000804cbb30 x18: 1fffe0003378f088 x17: ffff80008f7ee000 x16: ffff8000804cb454 x15: 0000000000000001 x14: 1fffe00033790d38 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600033790d39 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000073317 x7 : ffff800080660b08 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008b020a94 x2 : 0000000000000000 x1 : ffff80008edeef36 x0 : ffff80010c542000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:48 (P) cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1d8/0x454 kernel/sched/idle.c:330 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:428 rest_init+0x2d8/0x2f4 init/main.c:744 start_kernel+0x390/0x3e0 init/main.c:1097 __primary_switched+0x8c/0x94 arch/arm64/kernel/head.S:246