[ 1298.961504][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1298.961937][    C3] CPU: 3 UID: 0 PID: 3923 Comm: perl Not tainted 6.12.0-rc1-virtme #1
[ 1298.962221][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1298.962628][    C3] Call Trace:
[ 1298.962775][    C3]  <IRQ>
[ 1298.962872][    C3]  dump_stack_lvl+0x82/0xd0
[ 1298.963067][    C3]  __report_bad_irq+0x5f/0x180
[ 1298.963252][    C3]  note_interrupt+0x6b3/0x860
[ 1298.963441][    C3]  handle_irq_event+0x16d/0x1c0
[ 1298.963626][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1298.963817][    C3]  __common_interrupt+0x82/0x170
[ 1298.964009][    C3]  common_interrupt+0x81/0xa0
[ 1298.964198][    C3]  </IRQ>
[ 1298.964301][    C3]  <TASK>
[ 1298.964393][    C3]  asm_common_interrupt+0x26/0x40
[ 1298.964575][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1298.964811][    C3] Code: 10 e8 d1 d9 87 fd 48 89 ef e8 e9 4a 88 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 25 46 1b 63 <74> 0e 5b 5d c3 cc cc cc cc e8 cf 1b ad fd eb dc 0f 1f 44 00 00 5b
[ 1298.965452][    C3] RSP: 0018:ffffc9000106faa0 EFLAGS: 00000286
[ 1298.965675][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff403e6d8
[ 1298.965940][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9ce882f1
[ 1298.966217][    C3] RBP: ffffffffa0ab7420 R08: 0000000000000001 R09: fffffbfff40397d0
[ 1298.966488][    C3] R10: ffffffffa01cbe87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1298.966753][    C3] R13: 0000000000000001 R14: ffffffffa0ab7528 R15: 00000000ffffffff
[ 1298.967047][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1298.967281][    C3]  uart_write+0x220/0x920
[ 1298.967427][    C3]  process_output_block+0x13e/0x790
[ 1298.967610][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1298.967830][    C3]  n_tty_write+0x40c/0x790
[ 1298.968013][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1298.968195][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1298.968379][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1298.968550][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1298.968723][    C3]  ? lock_acquire+0x32/0xc0
[ 1298.968899][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1298.969075][    C3]  iterate_tty_write+0x222/0x540
[ 1298.969253][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1298.969427][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1298.969602][    C3]  vfs_write+0xa77/0x11d0
[ 1298.969741][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1298.969918][    C3]  ? __might_fault+0xc3/0x170
[ 1298.970093][    C3]  ? __might_fault+0x11b/0x170
[ 1298.970273][    C3]  ? trace_rseq_update+0xe2/0x140
[ 1298.970453][    C3]  ksys_write+0xf5/0x1e0
[ 1298.970587][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1298.970770][    C3]  do_syscall_64+0xc1/0x1d0
[ 1298.970946][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1298.971159][    C3] RIP: 0033:0x7fbf5e3f2957
[ 1298.971338][    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
[ 1298.971934][    C3] RSP: 002b:00007ffdf549d6e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1298.972202][    C3] RAX: ffffffffffffffda RBX: 00005569f53a02b0 RCX: 00007fbf5e3f2957
[ 1298.972455][    C3] RDX: 0000000000000001 RSI: 00005569f53a02b0 RDI: 0000000000000001
[ 1298.972708][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1298.972975][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005569f538b5e0
[ 1298.973226][    C3] R13: 00005569f536c2a0 R14: 0000000000000001 R15: 00005569f538b5e0
[ 1298.973492][    C3]  </TASK>
[ 1298.973626][    C3] handlers:
[ 1298.973762][    C3] [<ffffffff9b76d580>] serial8250_interrupt
[ 1298.974161][    C3] Disabling IRQ #4