[ 1917.711463][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1917.711859][    C3] CPU: 3 UID: 0 PID: 9631 Comm: perl Not tainted 6.12.0-rc2-virtme #1
[ 1917.712121][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1917.712504][    C3] Call Trace:
[ 1917.712650][    C3]  <IRQ>
[ 1917.712750][    C3]  dump_stack_lvl+0x82/0xd0
[ 1917.712940][    C3]  __report_bad_irq+0x5f/0x180
[ 1917.713119][    C3]  note_interrupt+0x6b3/0x860
[ 1917.713298][    C3]  handle_irq_event+0x16d/0x1c0
[ 1917.713472][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1917.713651][    C3]  __common_interrupt+0x82/0x170
[ 1917.713825][    C3]  common_interrupt+0x81/0xa0
[ 1917.713997][    C3]  </IRQ>
[ 1917.714089][    C3]  <TASK>
[ 1917.714178][    C3]  asm_common_interrupt+0x26/0x40
[ 1917.714367][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1917.714605][    C3] Code: 10 e8 21 9d 87 fd 48 89 ef e8 39 0e 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 15 09 db 5d <74> 0e 5b 5d c3 cc cc cc cc e8 bf dd ac fd eb dc 0f 1f 44 00 00 5b
[ 1917.715213][    C3] RSP: 0018:ffffc900026dfaa0 EFLAGS: 00000286
[ 1917.715440][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff4abe8bf
[ 1917.715708][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa228c001
[ 1917.715971][    C3] RBP: ffffffffa5eb83e0 R08: 0000000000000001 R09: fffffbfff4ab99d0
[ 1917.716225][    C3] R10: ffffffffa55cce87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1917.716491][    C3] R13: 0000000000000001 R14: ffffffffa5eb84e8 R15: 00000000ffffffff
[ 1917.716761][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1917.716983][    C3]  uart_write+0x220/0x920
[ 1917.717120][    C3]  process_output_block+0x13e/0x790
[ 1917.717294][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1917.717510][    C3]  n_tty_write+0x40c/0x790
[ 1917.717693][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1917.717866][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1917.718042][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1917.718218][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1917.718391][    C3]  ? lock_acquire+0x32/0xc0
[ 1917.718562][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1917.718740][    C3]  iterate_tty_write+0x222/0x540
[ 1917.718922][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1917.719104][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1917.719278][    C3]  vfs_write+0xa77/0x11d0
[ 1917.719413][    C3]  ? __pfx___lock_release+0x10/0x10
[ 1917.719582][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1917.719754][    C3]  ? __might_fault+0xc3/0x170
[ 1917.719923][    C3]  ? lock_acquire+0x32/0xc0
[ 1917.720093][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1917.720268][    C3]  ? __might_fault+0x11b/0x170
[ 1917.720453][    C3]  ? __rseq_handle_notify_resume+0x354/0x4e0
[ 1917.720674][    C3]  ksys_write+0xf5/0x1e0
[ 1917.720805][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1917.720984][    C3]  do_syscall_64+0xc1/0x1d0
[ 1917.721160][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1917.721369][    C3] RIP: 0033:0x7fae6bf5a957
[ 1917.721545][    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
[ 1917.722149][    C3] RSP: 002b:00007ffefa75edd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1917.722411][    C3] RAX: ffffffffffffffda RBX: 0000556a5c7a23f0 RCX: 00007fae6bf5a957
[ 1917.722666][    C3] RDX: 0000000000000001 RSI: 0000556a5c7a23f0 RDI: 0000000000000001
[ 1917.722925][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1917.723181][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000556a5c78d5e0
[ 1917.723434][    C3] R13: 0000556a5c76e2a0 R14: 0000000000000001 R15: 0000556a5c78d5e0
[ 1917.723698][    C3]  </TASK>
[ 1917.723826][    C3] handlers:
[ 1917.723961][    C3] [<ffffffffa0b6cf30>] serial8250_interrupt
[ 1917.724663][    C3] Disabling IRQ #4