[ 1208.078185][ T6287] Mirror/redirect action on
[ 1215.836761][ T6388] tc (6388) used greatest stack depth: 23904 bytes left
[ 1296.431138][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1296.431493][    C3] CPU: 3 UID: 0 PID: 6131 Comm: perl Not tainted 6.12.0-rc3-virtme #1
[ 1296.431736][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1296.432086][    C3] Call Trace:
[ 1296.432212][    C3]  <IRQ>
[ 1296.432302][    C3]  dump_stack_lvl+0x82/0xd0
[ 1296.432471][    C3]  __report_bad_irq+0x5f/0x180
[ 1296.432630][    C3]  note_interrupt+0x6b3/0x860
[ 1296.432792][    C3]  handle_irq_event+0x16d/0x1c0
[ 1296.432948][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1296.433109][    C3]  __common_interrupt+0x82/0x170
[ 1296.433269][    C3]  common_interrupt+0x81/0xa0
[ 1296.433423][    C3]  </IRQ>
[ 1296.433511][    C3]  <TASK>
[ 1296.433598][    C3]  asm_common_interrupt+0x26/0x40
[ 1296.433761][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1296.433966][    C3] Code: 10 e8 21 88 87 fd 48 89 ef e8 39 f9 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 b5 f5 9a 49 <74> 0e 5b 5d c3 cc cc cc cc e8 ef ca ac fd eb dc 0f 1f 44 00 00 5b
[ 1296.434513][    C3] RSP: 0018:ffffc9000105faa0 EFLAGS: 00000286
[ 1296.434711][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff733ef0a
[ 1296.434944][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb668d321
[ 1296.435241][    C3] RBP: ffffffffba2bb3e0 R08: 0000000000000001 R09: fffffbfff7339fd0
[ 1296.435476][    C3] R10: ffffffffb99cfe87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1296.435712][    C3] R13: 0000000000000001 R14: ffffffffba2bb4e8 R15: 00000000ffffffff
[ 1296.435952][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1296.436149][    C3]  uart_write+0x220/0x920
[ 1296.436283][    C3]  process_output_block+0x13e/0x790
[ 1296.436445][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1296.436639][    C3]  n_tty_write+0x40c/0x790
[ 1296.436799][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1296.436951][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1296.437111][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1296.437267][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1296.437433][    C3]  ? lock_acquire+0x32/0xc0
[ 1296.437592][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1296.437751][    C3]  iterate_tty_write+0x222/0x540
[ 1296.437914][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1296.438072][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1296.438231][    C3]  vfs_write+0xa77/0x11d0
[ 1296.438349][    C3]  ? __pfx_lock_acquire.part.0+0x10/0x10
[ 1296.438507][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1296.438669][    C3]  ? clockevents_program_event+0xf6/0x300
[ 1296.438836][    C3]  ? clockevents_program_event+0x1ea/0x300
[ 1296.439035][    C3]  ksys_write+0xf5/0x1e0
[ 1296.439155][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1296.439322][    C3]  do_syscall_64+0xc1/0x1d0
[ 1296.439480][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1296.439680][    C3] RIP: 0033:0x7ff177dd4957
[ 1296.439846][    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
[ 1296.440378][    C3] RSP: 002b:00007ffdf19ab848 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1296.440617][    C3] RAX: ffffffffffffffda RBX: 000055d9f1d293f0 RCX: 00007ff177dd4957
[ 1296.440859][    C3] RDX: 0000000000000001 RSI: 000055d9f1d293f0 RDI: 0000000000000001
[ 1296.441090][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1296.441322][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055d9f1d145e0
[ 1296.441554][    C3] R13: 000055d9f1cf52a0 R14: 0000000000000001 R15: 000055d9f1d145e0
[ 1296.441795][    C3]  </TASK>
[ 1296.441912][    C3] handlers:
[ 1296.442033][    C3] [<ffffffffb4f6d430>] serial8250_interrupt
[ 1296.442357][    C3] Disabling IRQ #4