watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [aoe_tx0:1315]
Modules linked in:
irq event stamp: 437615099
hardirqs last  enabled at (437615098): [<ffffffff8b7e5e95>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (437615098): [<ffffffff8b7e5e95>] _raw_spin_unlock_irqrestore+0x85/0x110 kernel/locking/spinlock.c:194
hardirqs last disabled at (437615099): [<ffffffff8b7bbe6e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050
softirqs last  enabled at (1628): [<ffffffff8964237b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last  enabled at (1628): [<ffffffff8964237b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
softirqs last  enabled at (1628): [<ffffffff8964237b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
softirqs last disabled at (1632): [<ffffffff8964237b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (1632): [<ffffffff8964237b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
softirqs last disabled at (1632): [<ffffffff8964237b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
CPU: 0 UID: 0 PID: 1315 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 2b 09 49 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 9e 11 f6 65 8b 05 6c d1 22 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900028bf680 EFLAGS: 00000206
RAX: da5186295a379e00 RBX: 0000000000000a02 RCX: da5186295a379e00
RDX: 0000000000000002 RSI: ffffffff8d9bbb7f RDI: 0000000000000001
RBP: ffffc900028bf708 R08: ffffffff8fa3b637 R09: 1ffffffff1f476c6
R10: dffffc0000000000 R11: fffffbfff1f476c7 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff99dfe320 R15: 1ffff92000517ed0
FS:  0000000000000000(0000) GS:ffff88808d20d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557447fca8 CR3: 0000000044b59000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline]
 uart_port_unlock_deref+0x111/0x2f0 drivers/tty/serial/serial_core.c:91
 uart_write_room+0xe4/0x170 drivers/tty/serial/serial_core.c:650
 handle_tx+0x163/0x610 drivers/net/caif/caif_serial.c:212
 __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+0x2d7/0x830 net/core/dev.c:3855
 __dev_queue_xmit+0x1b8d/0x3b50 net/core/dev.c:4725
 dev_queue_xmit include/linux/netdevice.h:3361 [inline]
 tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1d0/0x3e0 drivers/block/aoe/aoecmd.c:1241
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>