[ 1967.615068][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1967.615441][    C3] CPU: 3 UID: 0 PID: 13053 Comm: perl Not tainted 6.12.0-rc3-virtme #1
[ 1967.615703][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1967.616097][    C3] Call Trace:
[ 1967.616241][    C3]  <IRQ>
[ 1967.616335][    C3]  dump_stack_lvl+0x82/0xd0
[ 1967.616541][    C3]  __report_bad_irq+0x5f/0x180
[ 1967.616719][    C3]  note_interrupt+0x6b3/0x860
[ 1967.616905][    C3]  handle_irq_event+0x16d/0x1c0
[ 1967.617087][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1967.617270][    C3]  __common_interrupt+0x82/0x170
[ 1967.617448][    C3]  common_interrupt+0x81/0xa0
[ 1967.617623][    C3]  </IRQ>
[ 1967.617715][    C3]  <TASK>
[ 1967.617810][    C3]  asm_common_interrupt+0x26/0x40
[ 1967.617984][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1967.618204][    C3] Code: 10 e8 a1 58 87 fd 48 89 ef e8 b9 c9 87 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 95 c4 7a 4b <74> 0e 5b 5d c3 cc cc cc cc e8 5f 9b ac fd eb dc 0f 1f 44 00 00 5b
[ 1967.618822][    C3] RSP: 0018:ffffc9000085faa0 EFLAGS: 00000286
[ 1967.619057][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff6f7f2d8
[ 1967.619331][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb4890481
[ 1967.619603][    C3] RBP: ffffffffb84bd3e0 R08: 0000000000000001 R09: fffffbfff6f7a3d0
[ 1967.619869][    C3] R10: ffffffffb7bd1e87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1967.620139][    C3] R13: 0000000000000001 R14: ffffffffb84bd4e8 R15: 00000000ffffffff
[ 1967.620407][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1967.620634][    C3]  uart_write+0x220/0x920
[ 1967.620772][    C3]  process_output_block+0x13e/0x790
[ 1967.620959][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1967.621194][    C3]  n_tty_write+0x40c/0x790
[ 1967.621382][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1967.621556][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1967.621741][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1967.621924][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1967.622102][    C3]  ? lock_acquire+0x32/0xc0
[ 1967.622274][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1967.622465][    C3]  iterate_tty_write+0x222/0x540
[ 1967.622649][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1967.622854][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1967.623035][    C3]  vfs_write+0xa77/0x11d0
[ 1967.623168][    C3]  ? __pfx___lock_release+0x10/0x10
[ 1967.623353][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1967.623523][    C3]  ? __might_fault+0xc3/0x170
[ 1967.623708][    C3]  ? lock_acquire+0x32/0xc0
[ 1967.623887][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1967.624076][    C3]  ? __might_fault+0x11b/0x170
[ 1967.624255][    C3]  ? __rseq_handle_notify_resume+0x354/0x4e0
[ 1967.624487][    C3]  ksys_write+0xf5/0x1e0
[ 1967.624624][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1967.624811][    C3]  do_syscall_64+0xc1/0x1d0
[ 1967.624991][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1967.625210][    C3] RIP: 0033:0x7fcc57a2e957
[ 1967.625388][    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
[ 1967.626003][    C3] RSP: 002b:00007ffdac7ada48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1967.626283][    C3] RAX: ffffffffffffffda RBX: 00005602cefa73f0 RCX: 00007fcc57a2e957
[ 1967.626540][    C3] RDX: 0000000000000001 RSI: 00005602cefa73f0 RDI: 0000000000000001
[ 1967.626797][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1967.627059][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005602cef925e0
[ 1967.627371][    C3] R13: 00005602cef732a0 R14: 0000000000000001 R15: 00005602cef925e0
[ 1967.627639][    C3]  </TASK>
[ 1967.627776][    C3] handlers:
[ 1967.627910][    C3] [<ffffffffb316d670>] serial8250_interrupt
[ 1967.628285][    C3] Disabling IRQ #4