[ 841.868423][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 841.868797][ C3] CPU: 3 PID: 8808 Comm: perl Not tainted 6.8.0-virtme #1
[ 841.869000][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 841.869399][ C3] Call Trace:
[ 841.869524][ C3]
[ 841.869607][ C3] dump_stack_lvl+0x82/0xd0
[ 841.869779][ C3] __report_bad_irq+0x5f/0x180
[ 841.869937][ C3] note_interrupt+0x6b3/0x860
[ 841.870097][ C3] handle_irq_event+0x16d/0x1c0
[ 841.870251][ C3] handle_edge_irq+0x1fa/0xb60
[ 841.870409][ C3] __common_interrupt+0x7c/0x180
[ 841.870565][ C3] common_interrupt+0x7e/0x90
[ 841.870727][ C3]
[ 841.870820][ C3]
[ 841.870900][ C3] asm_common_interrupt+0x26/0x40
[ 841.871058][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 841.871257][ C3] Code: 10 e8 f1 a8 9b fd 48 89 ef e8 29 19 9c fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 55 1b 70 47 <74> 0e 5b 5d c3 cc cc cc cc e8 4f 12 bf fd eb dc 0f 1f 44 00 00 5b
[ 841.871805][ C3] RSP: 0018:ffffc90000a9fa80 EFLAGS: 00000286
[ 841.872015][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff776813b
[ 841.872262][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb893a941
[ 841.872499][ C3] RBP: ffffffffbc4211a0 R08: 0000000000000001 R09: fffffbfff77632b0
[ 841.872731][ C3] R10: ffffffffbbb19587 R11: 0000000000000000 R12: 0000000000000c7b
[ 841.872962][ C3] R13: ffffffffbc4212a8 R14: ffffffffbc4211a0 R15: ffff888003a30000
[ 841.873215][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 841.873415][ C3] uart_write+0x224/0x450
[ 841.873552][ C3] process_output_block+0x13e/0x790
[ 841.873716][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 841.873917][ C3] n_tty_write+0x412/0x7a0
[ 841.874079][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 841.874235][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 841.874386][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 841.874540][ C3] ? iterate_tty_write+0x95/0x540
[ 841.874698][ C3] ? lock_acquire+0x32/0xc0
[ 841.874857][ C3] ? iterate_tty_write+0x95/0x540
[ 841.875019][ C3] iterate_tty_write+0x228/0x540
[ 841.875201][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 841.875369][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 841.875529][ C3] vfs_write+0x9e5/0x10a0
[ 841.875649][ C3] ? __pfx___lock_release+0x10/0x10
[ 841.875804][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 841.875965][ C3] ? __pfx_vfs_write+0x10/0x10
[ 841.876121][ C3] ? clockevents_program_event+0xf6/0x300
[ 841.876282][ C3] ? ktime_get+0xb3/0x190
[ 841.876401][ C3] ? __fget_light+0x53/0x1e0
[ 841.876558][ C3] ? clockevents_program_event+0x1ea/0x300
[ 841.876758][ C3] ksys_write+0xf5/0x1e0
[ 841.876874][ C3] ? __pfx_ksys_write+0x10/0x10
[ 841.877040][ C3] do_syscall_64+0xc6/0x1e0
[ 841.877201][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 841.877395][ C3] RIP: 0033:0x7f8a3921f957
[ 841.877570][ C3] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
[ 841.878104][ C3] RSP: 002b:00007ffff0e59798 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 841.878347][ C3] RAX: ffffffffffffffda RBX: 000056170ddc8fb0 RCX: 00007f8a3921f957
[ 841.878603][ C3] RDX: 0000000000000001 RSI: 000056170ddc8fb0 RDI: 0000000000000001
[ 841.878827][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 841.879051][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000056170ddb5590
[ 841.879271][ C3] R13: 000056170dd962a0 R14: 0000000000000001 R15: 000056170ddb5590
[ 841.879512][ C3]
[ 841.879632][ C3] handlers:
[ 841.879751][ C3] [] serial8250_interrupt
[ 841.880061][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr