[ 1888.730940][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1888.731428][    C3] CPU: 3 UID: 0 PID: 11056 Comm: perl Not tainted 6.12.0-rc3-virtme #1
[ 1888.731707][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1888.732122][    C3] Call Trace:
[ 1888.732266][    C3]  <IRQ>
[ 1888.732360][    C3]  dump_stack_lvl+0x82/0xd0
[ 1888.732546][    C3]  __report_bad_irq+0x5f/0x180
[ 1888.732725][    C3]  note_interrupt+0x6b3/0x860
[ 1888.732920][    C3]  handle_irq_event+0x16d/0x1c0
[ 1888.733097][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1888.733282][    C3]  __common_interrupt+0x82/0x170
[ 1888.733483][    C3]  common_interrupt+0x81/0xa0
[ 1888.733656][    C3]  </IRQ>
[ 1888.733758][    C3]  <TASK>
[ 1888.733849][    C3]  asm_common_interrupt+0x26/0x40
[ 1888.734052][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1888.734282][    C3] Code: 10 e8 31 89 87 fd 48 89 ef e8 49 fa 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 c5 f6 9a 47 <74> 0e 5b 5d c3 cc cc cc cc e8 ff cb ac fd eb dc 0f 1f 44 00 00 5b
[ 1888.734906][    C3] RSP: 0018:ffffc9000213faa0 EFLAGS: 00000286
[ 1888.735151][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff773e88d
[ 1888.735418][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb868d211
[ 1888.735690][    C3] RBP: ffffffffbc2b83e0 R08: 0000000000000001 R09: fffffbfff77399d0
[ 1888.735961][    C3] R10: ffffffffbb9cce87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1888.736220][    C3] R13: 0000000000000001 R14: ffffffffbc2b84e8 R15: 00000000ffffffff
[ 1888.736488][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1888.736712][    C3]  uart_write+0x220/0x920
[ 1888.736871][    C3]  process_output_block+0x13e/0x790
[ 1888.737050][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1888.737276][    C3]  n_tty_write+0x40c/0x790
[ 1888.737461][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1888.737656][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1888.737859][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1888.738039][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1888.738233][    C3]  ? lock_acquire+0x32/0xc0
[ 1888.738409][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1888.738608][    C3]  iterate_tty_write+0x222/0x540
[ 1888.738789][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1888.738987][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1888.739179][    C3]  vfs_write+0xa77/0x11d0
[ 1888.739329][    C3]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1888.739510][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1888.739726][    C3]  ? clockevents_program_event+0xf6/0x300
[ 1888.739915][    C3]  ? clockevents_program_event+0x1ea/0x300
[ 1888.740154][    C3]  ksys_write+0xf5/0x1e0
[ 1888.740292][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1888.740481][    C3]  do_syscall_64+0xc1/0x1d0
[ 1888.740671][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1888.740882][    C3] RIP: 0033:0x7f510ce06957
[ 1888.741062][    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
[ 1888.741688][    C3] RSP: 002b:00007ffed04c7e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1888.741980][    C3] RAX: ffffffffffffffda RBX: 00005573b435a3f0 RCX: 00007f510ce06957
[ 1888.742265][    C3] RDX: 0000000000000001 RSI: 00005573b435a3f0 RDI: 0000000000000001
[ 1888.742528][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1888.742873][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005573b43455e0
[ 1888.743153][    C3] R13: 00005573b43262a0 R14: 0000000000000001 R15: 00005573b43455e0
[ 1888.743444][    C3]  </TASK>
[ 1888.743611][    C3] handlers:
[ 1888.743746][    C3] [<ffffffffb6f6e4f0>] serial8250_interrupt
[ 1888.744419][    C3] Disabling IRQ #4