[ 921.450881][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 921.451283][ C3] CPU: 3 PID: 4472 Comm: perl Not tainted 6.8.0-virtme #1
[ 921.451500][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 921.451922][ C3] Call Trace:
[ 921.452081][ C3]
[ 921.452186][ C3] dump_stack_lvl+0x64/0xb0
[ 921.452371][ C3] __report_bad_irq+0x5f/0x180
[ 921.452548][ C3] note_interrupt+0x6b3/0x860
[ 921.452743][ C3] handle_irq_event+0x16d/0x1c0
[ 921.452942][ C3] handle_edge_irq+0x1fa/0xb60
[ 921.453118][ C3] __common_interrupt+0x7c/0x180
[ 921.453295][ C3] common_interrupt+0x7e/0x90
[ 921.453484][ C3]
[ 921.453592][ C3]
[ 921.453680][ C3] asm_common_interrupt+0x26/0x40
[ 921.453877][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 921.454106][ C3] Code: 10 e8 61 6d a0 fd 48 89 ef e8 89 d9 a0 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 45 58 d5 4c <74> 0e 5b 5d c3 cc cc cc cc e8 df 9a c3 fd eb dc 0f 1f 44 00 00 5b
[ 921.454709][ C3] RSP: 0018:ffffc900014cfa80 EFLAGS: 00000286
[ 921.454942][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff6c9d154
[ 921.455228][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb32e6c51
[ 921.455497][ C3] RBP: ffffffffb6dc6f60 R08: 0000000000000001 R09: fffffbfff6c982b0
[ 921.455757][ C3] R10: ffffffffb64c1587 R11: 0000000000000000 R12: 0000000000000391
[ 921.456015][ C3] R13: ffffffffb6dc7068 R14: ffffffffb6dc6f60 R15: ffff888002470000
[ 921.456276][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 921.456517][ C3] uart_write+0x224/0x450
[ 921.456654][ C3] process_output_block+0x13e/0x790
[ 921.456838][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 921.457061][ C3] n_tty_write+0x412/0x7a0
[ 921.457243][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 921.457412][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 921.457590][ C3] ? lock_acquire+0x1c1/0x220
[ 921.457758][ C3] ? iterate_tty_write+0x95/0x540
[ 921.457942][ C3] iterate_tty_write+0x228/0x540
[ 921.458117][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 921.458316][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 921.458504][ C3] vfs_write+0x9e5/0x10a0
[ 921.458639][ C3] ? lock_acquire+0x1c1/0x220
[ 921.458811][ C3] ? __pfx_vfs_write+0x10/0x10
[ 921.458987][ C3] ? __might_fault+0xc3/0x170
[ 921.459175][ C3] ? __fget_light+0x53/0x1e0
[ 921.459351][ C3] ksys_write+0xf5/0x1e0
[ 921.459492][ C3] ? __pfx_ksys_write+0x10/0x10
[ 921.459668][ C3] do_syscall_64+0xc6/0x1e0
[ 921.459853][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 921.460064][ C3] RIP: 0033:0x7f6a99437957
[ 921.460239][ 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
[ 921.460829][ C3] RSP: 002b:00007fff5ded4698 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 921.461091][ C3] RAX: ffffffffffffffda RBX: 00005560a01ca070 RCX: 00007f6a99437957
[ 921.461350][ C3] RDX: 0000000000000001 RSI: 00005560a01ca070 RDI: 0000000000000001
[ 921.461636][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 921.461889][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005560a01b6590
[ 921.462136][ C3] R13: 00005560a01972a0 R14: 0000000000000001 R15: 00005560a01b6590
[ 921.462414][ C3]
[ 921.462553][ C3] handlers:
[ 921.462681][ C3] [] serial8250_interrupt
[ 921.463078][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr