syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [aoe_tx0:2060]
Modules linked in:
irq event stamp: 65620337
hardirqs last  enabled at (65620336): [<ffff800011a419e4>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (65620336): [<ffff800011a419e4>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (65620337): [<ffff800011956170>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline]
hardirqs last disabled at (65620337): [<ffff800011956170>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:486
softirqs last  enabled at (1020): [<ffff80000fd3e550>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1024): [<ffff80000fd3e51c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
CPU: 0 PID: 2060 Comm: aoe_tx0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (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+0x58/0xac kernel/locking/spinlock.c:194
lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
lr : _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
sp : ffff8000271c7840
x29: ffff8000271c7840 x28: ffff0000f088d430 x27: ffff0000ef4a1000
x26: ffff0000f088d3c0 x25: 1fffe0001a3e9996 x24: 0000000000000000
x23: 0000000000000000 x22: dfff800000000000 x21: ffff0000cde30fd8
x20: ffff80001c662b30 x19: 0000000000000000 x18: ffff800011abbcc0
x17: ffff8000181f9000 x16: ffff8000082d22d4 x15: ffff800017cd9fc0
x14: ffff0000d17bddd8 x13: 1ffff00002a180b1 x12: 0000000000ff0100
x11: ff0080000a893674 x10: 0000000000000003 x9 : 0000000000000080
x8 : 00000000000000c0 x7 : ffff80000b35b19c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000002 x1 : ffff800011abd7c0 x0 : ffff80018a6a7000
Call trace:
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 uart_write_room+0x150/0x2d4 drivers/tty/serial/serial_core.c:615
 tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:80
 handle_tx+0x120/0x5f8 drivers/net/caif/caif_serial.c:226
 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:282
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3670 [inline]
 dev_hard_start_xmit+0x244/0x8e0 net/core/dev.c:3686
 __dev_queue_xmit+0x155c/0x309c net/core/dev.c:4346
 dev_queue_xmit include/linux/netdevice.h:3051 [inline]
 tx+0x9c/0x1c8 drivers/block/aoe/aoenet.c:63
 kthread+0x160/0x330 drivers/block/aoe/aoecmd.c:1241
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850