[ 1282.857095][ T8404] Mirror/redirect action on
[ 1306.147772][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1306.148139][    C3] CPU: 3 UID: 0 PID: 8267 Comm: perl Not tainted 6.12.0-rc1-virtme #1
[ 1306.148378][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1306.148741][    C3] Call Trace:
[ 1306.148868][    C3]  <IRQ>
[ 1306.148959][    C3]  dump_stack_lvl+0x82/0xd0
[ 1306.149137][    C3]  __report_bad_irq+0x5f/0x180
[ 1306.149299][    C3]  note_interrupt+0x6b3/0x860
[ 1306.149462][    C3]  handle_irq_event+0x16d/0x1c0
[ 1306.149623][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1306.149785][    C3]  __common_interrupt+0x82/0x170
[ 1306.149944][    C3]  common_interrupt+0x81/0xa0
[ 1306.150102][    C3]  </IRQ>
[ 1306.150185][    C3]  <TASK>
[ 1306.150266][    C3]  asm_common_interrupt+0x26/0x40
[ 1306.150423][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1306.150630][    C3] Code: 10 e8 11 0b 88 fd 48 89 ef e8 29 7c 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 65 77 7b 47 <74> 0e 5b 5d c3 cc cc cc cc e8 5f 4c ad fd eb dc 0f 1f 44 00 00 5b
[ 1306.151180][    C3] RSP: 0018:ffffc90008d8faa0 EFLAGS: 00000286
[ 1306.151383][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff777e2f1
[ 1306.151620][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb88851b1
[ 1306.151855][    C3] RBP: ffffffffbc4b5420 R08: 0000000000000001 R09: fffffbfff77793d0
[ 1306.152087][    C3] R10: ffffffffbbbc9e87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1306.152343][    C3] R13: 0000000000000001 R14: ffffffffbc4b5528 R15: 00000000ffffffff
[ 1306.152595][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1306.152800][    C3]  uart_write+0x220/0x920
[ 1306.152931][    C3]  process_output_block+0x13e/0x790
[ 1306.153089][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1306.153285][    C3]  n_tty_write+0x40c/0x790
[ 1306.153448][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1306.153605][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1306.153762][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1306.153922][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1306.154080][    C3]  ? lock_acquire+0x32/0xc0
[ 1306.154237][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1306.154405][    C3]  iterate_tty_write+0x222/0x540
[ 1306.154564][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1306.154726][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1306.154884][    C3]  vfs_write+0xa77/0x11d0
[ 1306.155005][    C3]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1306.155161][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1306.155321][    C3]  ? clockevents_program_event+0xf6/0x300
[ 1306.155490][    C3]  ? clockevents_program_event+0x1ea/0x300
[ 1306.155687][    C3]  ksys_write+0xf5/0x1e0
[ 1306.155809][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1306.155976][    C3]  do_syscall_64+0xc1/0x1d0
[ 1306.156134][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1306.156335][    C3] RIP: 0033:0x7f08dcd03957
[ 1306.156496][    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
[ 1306.157061][    C3] RSP: 002b:00007ffd0dfdb138 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1306.157304][    C3] RAX: ffffffffffffffda RBX: 000055ef16a593f0 RCX: 00007f08dcd03957
[ 1306.157541][    C3] RDX: 0000000000000001 RSI: 000055ef16a593f0 RDI: 0000000000000001
[ 1306.157773][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1306.158011][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055ef16a445e0
[ 1306.158244][    C3] R13: 000055ef16a252a0 R14: 0000000000000001 R15: 000055ef16a445e0
[ 1306.158493][    C3]  </TASK>
[ 1306.158612][    C3] handlers:
[ 1306.158733][    C3] [<ffffffffb716d590>] serial8250_interrupt
[ 1306.159085][    C3] Disabling IRQ #4