[ 1634.309369][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1634.309844][    C3] CPU: 3 PID: 6874 Comm: perl Not tainted 6.10.0-virtme #1
[ 1634.310116][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1634.310472][    C3] Call Trace:
[ 1634.310611][    C3]  <IRQ>
[ 1634.310697][    C3]  dump_stack_lvl+0x82/0xd0
[ 1634.310866][    C3]  __report_bad_irq+0x5f/0x180
[ 1634.311028][    C3]  note_interrupt+0x6b3/0x860
[ 1634.311187][    C3]  handle_irq_event+0x16d/0x1c0
[ 1634.311351][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1634.311522][    C3]  __common_interrupt+0x82/0x170
[ 1634.311686][    C3]  common_interrupt+0x7e/0x90
[ 1634.311850][    C3]  </IRQ>
[ 1634.311935][    C3]  <TASK>
[ 1634.312019][    C3]  asm_common_interrupt+0x26/0x40
[ 1634.312179][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1634.312400][    C3] Code: 10 e8 41 40 8e fd 48 89 ef e8 e9 b0 8e 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 15 c8 02 74 <74> 0e 5b 5d c3 cc cc cc cc e8 af 78 b2 fd eb dc 0f 1f 44 00 00 5b
[ 1634.312957][    C3] RSP: 0018:ffffc900008bfab8 EFLAGS: 00000286
[ 1634.313152][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1e77175
[ 1634.313401][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8c0100c1
[ 1634.313635][    C3] RBP: ffffffff8fc7a2a0 R08: 0000000000000001 R09: fffffbfff1e722b8
[ 1634.313876][    C3] R10: ffffffff8f3915c7 R11: 0000000000000000 R12: ffffffff8fc7a3a8
[ 1634.314111][    C3] R13: ffff888005fe7000 R14: ffffffff8fc7a2a0 R15: 0000000000000286
[ 1634.314356][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1634.314560][    C3]  uart_write+0x13e/0x320
[ 1634.314686][    C3]  process_output_block+0x13e/0x790
[ 1634.314865][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1634.315077][    C3]  n_tty_write+0x412/0x7a0
[ 1634.315243][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1634.315398][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1634.315560][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1634.315721][    C3]  ? iterate_tty_write+0x95/0x540
[ 1634.315880][    C3]  ? lock_acquire+0x32/0xc0
[ 1634.316037][    C3]  ? iterate_tty_write+0x95/0x540
[ 1634.316198][    C3]  iterate_tty_write+0x228/0x540
[ 1634.316360][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1634.316541][    C3]  file_tty_write.constprop.0+0x1db/0x370
[ 1634.316700][    C3]  vfs_write+0xa1b/0x10b0
[ 1634.316826][    C3]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1634.316983][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1634.317148][    C3]  ? __fget_light+0x53/0x1e0
[ 1634.317316][    C3]  ksys_write+0xf5/0x1e0
[ 1634.317434][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1634.317610][    C3]  do_syscall_64+0xc1/0x1d0
[ 1634.317781][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1634.317979][    C3] RIP: 0033:0x7fb8738b2957
[ 1634.318136][    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
[ 1634.318690][    C3] RSP: 002b:00007ffc246456c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1634.318941][    C3] RAX: ffffffffffffffda RBX: 0000557793d961d0 RCX: 00007fb8738b2957
[ 1634.319168][    C3] RDX: 0000000000000001 RSI: 0000557793d961d0 RDI: 0000000000000001
[ 1634.319408][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1634.319646][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000557793d825c0
[ 1634.319878][    C3] R13: 0000557793d632a0 R14: 0000000000000001 R15: 0000557793d825c0
[ 1634.320116][    C3]  </TASK>
[ 1634.320233][    C3] handlers:
[ 1634.320347][    C3] [<ffffffff8a90c350>] serial8250_interrupt
[ 1634.320717][    C3] Disabling IRQ #4