watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [aoe_tx0:2394] Modules linked in: irq event stamp: 35250063 hardirqs last enabled at (35250062): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (35250062): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (35250063): [] __el1_irq arch/arm64/kernel/entry-common.c:580 [inline] hardirqs last disabled at (35250063): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:598 softirqs last enabled at (1152): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1156): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 0 UID: 0 PID: 2394 Comm: aoe_tx0 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (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 : ffff8000a1c476c0 x29: ffff8000a1c476c0 x28: ffff80008f311000 x27: 1ffff00011e62259 x26: 0000000000000000 x25: dfff800000000000 x24: 0000000000000000 x23: 0000000000000003 x22: 0000000000000000 x21: 0000000000000000 x20: ffff8000972c6ac0 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800092f27000 x16: ffff8000805192b8 x15: 0000000000000001 x14: 1ffff00012e58d58 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800092d26c00 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083cd0c64 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008e902b8e x0 : ffff80010d10a000 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:786 [inline] uart_write_room+0x328/0x728 drivers/tty/serial/serial_core.c:649 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:5203 [inline] netdev_start_xmit include/linux/netdevice.h:5212 [inline] xmit_one net/core/dev.c:3776 [inline] dev_hard_start_xmit+0x2b0/0x8ac net/core/dev.c:3792 __dev_queue_xmit+0x15a4/0x31f0 net/core/dev.c:4629 dev_queue_xmit include/linux/netdevice.h:3350 [inline] tx+0x9c/0x1cc drivers/block/aoe/aoenet.c:62 kthread+0x164/0x354 drivers/block/aoe/aoecmd.c:1237 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 40 Comm: kworker/u8:2 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound toggle_allocation_gate pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:340 [inline] pc : smp_call_function_many_cond+0xe14/0x1308 kernel/smp.c:885 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0xe2c/0x1308 kernel/smp.c:885 sp : ffff800097d077b0 x29: ffff800097d07830 x28: 0000000000000011 x27: 0000000000000000 x26: dfff800000000000 x25: ffff80008f311de8 x24: ffff00019c3a18c0 x23: ffffffffffffffff x22: 1fffe00033874318 x21: 1fffe00033874319 x20: ffff00019c383908 x19: ffff00019c3a18c8 x18: 1fffe00033871676 x17: ffff80008f30e000 x16: ffff80008adb410c x15: 0000000000000001 x14: 1fffe00033870721 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600033870722 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff80008022e920 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80008066f14c x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) csd_lock_wait kernel/smp.c:340 [inline] (P) smp_call_function_many_cond+0xe14/0x1308 kernel/smp.c:885 (P) smp_call_function_many kernel/smp.c:909 [inline] smp_call_function kernel/smp.c:931 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1076 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x30c/0x334 kernel/jump_label.c:521 jump_label_update+0x3f0/0x484 kernel/jump_label.c:919 static_key_enable_cpuslocked+0x11c/0x220 kernel/jump_label.c:210 static_key_enable+0x24/0x38 kernel/jump_label.c:223 toggle_allocation_gate+0xbc/0x240 mm/kfence/core.c:850 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847