[  961.945044][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[  961.945428][    C3] CPU: 3 UID: 0 PID: 11273 Comm: perl Not tainted 6.10.0-virtme #1
[  961.945671][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  961.946042][    C3] Call Trace:
[  961.946177][    C3]  <IRQ>
[  961.946276][    C3]  dump_stack_lvl+0x82/0xd0
[  961.946451][    C3]  __report_bad_irq+0x5f/0x180
[  961.946629][    C3]  note_interrupt+0x6b3/0x860
[  961.946801][    C3]  handle_irq_event+0x16d/0x1c0
[  961.946965][    C3]  handle_edge_irq+0x1fa/0xb60
[  961.947149][    C3]  __common_interrupt+0x82/0x170
[  961.947312][    C3]  common_interrupt+0x7e/0x90
[  961.947494][    C3]  </IRQ>
[  961.947585][    C3]  <TASK>
[  961.947664][    C3]  asm_common_interrupt+0x26/0x40
[  961.947843][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[  961.948043][    C3] Code: 10 e8 a1 39 8e fd 48 89 ef e8 49 aa 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 a5 80 62 72 <74> 0e 5b 5d c3 cc cc cc cc e8 6f 77 b2 fd eb dc 0f 1f 44 00 00 5b
[  961.948592][    C3] RSP: 0018:ffffc9000165fab8 EFLAGS: 00000286
[  961.948803][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff21b7042
[  961.949044][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8da14831
[  961.949309][    C3] RBP: ffffffff91679320 R08: 0000000000000001 R09: fffffbfff21b2108
[  961.949558][    C3] R10: ffffffff90d90847 R11: 0000000000000000 R12: ffffffff91679428
[  961.949802][    C3] R13: ffff888005f73400 R14: ffffffff91679320 R15: 0000000000000282
[  961.950071][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[  961.950272][    C3]  uart_write+0x13e/0x320
[  961.950429][    C3]  process_output_block+0x13e/0x790
[  961.950588][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[  961.950803][    C3]  n_tty_write+0x412/0x7a0
[  961.951010][    C3]  ? __pfx_n_tty_write+0x10/0x10
[  961.951182][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[  961.951357][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[  961.951524][    C3]  ? iterate_tty_write+0x95/0x540
[  961.951699][    C3]  ? lock_acquire+0x32/0xc0
[  961.951854][    C3]  ? iterate_tty_write+0x95/0x540
[  961.952011][    C3]  iterate_tty_write+0x228/0x540
[  961.952172][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[  961.952348][    C3]  file_tty_write.constprop.0+0x1db/0x370
[  961.952517][    C3]  vfs_write+0xa1b/0x10b0
[  961.952640][    C3]  ? __pfx_vfs_write+0x10/0x10
[  961.952819][    C3]  ? __might_fault+0xc3/0x170
[  961.952976][    C3]  ? __might_fault+0x11b/0x170
[  961.953149][    C3]  ? __fget_light+0x53/0x1e0
[  961.953335][    C3]  ksys_write+0xf5/0x1e0
[  961.953485][    C3]  ? __pfx_ksys_write+0x10/0x10
[  961.953650][    C3]  do_syscall_64+0xc1/0x1d0
[  961.953815][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  961.954008][    C3] RIP: 0033:0x7ff15e366957
[  961.954211][    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
[  961.954795][    C3] RSP: 002b:00007ffe78ed3058 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  961.955043][    C3] RAX: ffffffffffffffda RBX: 000055c6f8f30310 RCX: 00007ff15e366957
[  961.955277][    C3] RDX: 0000000000000001 RSI: 000055c6f8f30310 RDI: 0000000000000001
[  961.955541][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[  961.955807][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055c6f8f1c5c0
[  961.956032][    C3] R13: 000055c6f8efd2a0 R14: 0000000000000001 R15: 000055c6f8f1c5c0
[  961.956277][    C3]  </TASK>
[  961.956397][    C3] handlers:
[  961.956513][    C3] [<ffffffff8c31e610>] serial8250_interrupt
[  961.956865][    C3] Disabling IRQ #4