watchdog: BUG: soft lockup - CPU#0 stuck for 245s! [aoe_tx0:1296]
Modules linked in:
irq event stamp: 448629321
hardirqs last  enabled at (448629320): [<ffffffff8b728c42>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (448629320): [<ffffffff8b728c42>] _raw_spin_unlock_irqrestore+0x52/0x80 kernel/locking/spinlock.c:194
hardirqs last disabled at (448629321): [<ffffffff8b6fd73e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049
softirqs last  enabled at (10546): [<ffffffff89492426>] rcu_lock_release include/linux/rcupdate.h:341 [inline]
softirqs last  enabled at (10546): [<ffffffff89492426>] rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
softirqs last  enabled at (10546): [<ffffffff89492426>] __dev_queue_xmit+0x896/0x43e0 net/core/dev.c:4663
softirqs last disabled at (10550): [<ffffffff89491e06>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (10550): [<ffffffff89491e06>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
softirqs last disabled at (10550): [<ffffffff89491e06>] __dev_queue_xmit+0x276/0x43e0 net/core/dev.c:4561
CPU: 0 UID: 0 PID: 1296 Comm: aoe_tx0 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:uart_write_room+0x0/0x940 drivers/tty/serial/serial_core.c:641
Code: 18 d6 fc e9 4e fe ff ff e8 ed 17 d6 fc e9 7b fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 57 41 56 41 55 41 54 55 53 48 89 fb 48 83 ec 10 e8
RSP: 0018:ffffc9000432f9c8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff88805ae9d000 RCX: ffffffff8687385f
RDX: ffff888028518000 RSI: ffffffff8542913d RDI: ffff88805ae9d000
RBP: 0000000000000800 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000000 R12: ffffffff854995b0
R13: ffff88807edc6d80 R14: 0000000000000020 R15: ffff88807edc6000
FS:  0000000000000000(0000) GS:ffff8881249b9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d8d005f98 CR3: 000000005066e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 tty_write_room+0x66/0x90 drivers/tty/tty_ioctl.c:69
 handle_tx+0x14f/0x630 drivers/net/caif/caif_serial.c:212
 __netdev_start_xmit include/linux/netdevice.h:5201 [inline]
 netdev_start_xmit include/linux/netdevice.h:5210 [inline]
 xmit_one net/core/dev.c:3783 [inline]
 dev_hard_start_xmit+0x96/0x740 net/core/dev.c:3799
 __dev_queue_xmit+0x7eb/0x43e0 net/core/dev.c:4636
 dev_queue_xmit include/linux/netdevice.h:3350 [inline]
 tx+0xcc/0x190 drivers/block/aoe/aoenet.c:62
 kthread+0x1e4/0x3e0 drivers/block/aoe/aoecmd.c:1237
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.15.0-rc1-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
Code: 95 5f 02 e9 5e 64 a0 f5 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d d3 fc 19 00 fb f4 <e9> 37 64 a0 f5 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df8 EFLAGS: 00000286
RAX: 0000000000e13bbf RBX: 0000000000000001 RCX: ffffffff8b6ff439
RDX: 0000000000000000 RSI: ffffffff8dbeaac6 RDI: ffffffff8bf45100
RBP: ffffed1003b5fb40 R08: 0000000000000001 R09: ffffed10170a65bd
R10: ffff8880b8532deb R11: 0000000000000000 R12: 0000000000000001
R13: ffff88801dafda00 R14: ffffffff90867310 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124ab9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2febf8 CR3: 000000005066e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:748
 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x391/0x510 kernel/sched/idle.c:325
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x148
 </TASK>