[ 856.926335][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 856.926727][ C3] CPU: 3 PID: 9910 Comm: perl Not tainted 6.9.0-rc3-virtme #1
[ 856.926984][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 856.927363][ C3] Call Trace:
[ 856.927497][ C3]
[ 856.927593][ C3] dump_stack_lvl+0x82/0xd0
[ 856.927781][ C3] __report_bad_irq+0x5f/0x180
[ 856.927957][ C3] note_interrupt+0x6b3/0x860
[ 856.928134][ C3] handle_irq_event+0x16d/0x1c0
[ 856.928493][ C3] handle_edge_irq+0x1fa/0xb60
[ 856.928670][ C3] __common_interrupt+0x7c/0x180
[ 856.928843][ C3] common_interrupt+0x7e/0x90
[ 856.929017][ C3]
[ 856.929109][ C3]
[ 856.929196][ C3] asm_common_interrupt+0x26/0x40
[ 856.929367][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 856.929584][ C3] Code: 10 e8 71 d8 9a fd 48 89 ef e8 a9 48 9b 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 1d ef 55 <74> 0e 5b 5d c3 cc cc cc cc e8 6f 45 be fd eb dc 0f 1f 44 00 00 5b
[ 856.930174][ C3] RSP: 0018:ffffc9000159fa80 EFLAGS: 00000286
[ 856.930388][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff5a69109
[ 856.930641][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffaa14aa81
[ 856.930891][ C3] RBP: ffffffffadc291a0 R08: 0000000000000001 R09: fffffbfff5a642b0
[ 856.931136][ C3] R10: ffffffffad321587 R11: 0000000000000000 R12: 00000000000005b6
[ 856.931387][ C3] R13: ffffffffadc292a8 R14: ffffffffadc291a0 R15: ffff8880047e0000
[ 856.931647][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 856.931864][ C3] uart_write+0x224/0x450
[ 856.931998][ C3] process_output_block+0x13e/0x790
[ 856.932167][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 856.932383][ C3] n_tty_write+0x412/0x7a0
[ 856.932559][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 856.932725][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 856.932894][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 856.933069][ C3] ? iterate_tty_write+0x95/0x540
[ 856.933235][ C3] ? lock_acquire+0x32/0xc0
[ 856.933401][ C3] ? iterate_tty_write+0x95/0x540
[ 856.933574][ C3] iterate_tty_write+0x228/0x540
[ 856.933749][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 856.933921][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 856.934090][ C3] vfs_write+0x9e5/0x10a0
[ 856.934220][ C3] ? __pfx___lock_release+0x10/0x10
[ 856.934390][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 856.934559][ C3] ? __pfx_vfs_write+0x10/0x10
[ 856.934727][ C3] ? clockevents_program_event+0xf6/0x300
[ 856.934899][ C3] ? ktime_get+0xb3/0x190
[ 856.935026][ C3] ? __fget_light+0x53/0x1e0
[ 856.935193][ C3] ? clockevents_program_event+0x1ea/0x300
[ 856.935405][ C3] ksys_write+0xf5/0x1e0
[ 856.935531][ C3] ? __pfx_ksys_write+0x10/0x10
[ 856.935703][ C3] do_syscall_64+0xc3/0x1d0
[ 856.935873][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 856.936081][ C3] RIP: 0033:0x7faa80392957
[ 856.936248][ 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
[ 856.936833][ C3] RSP: 002b:00007fff25051958 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 856.937081][ C3] RAX: ffffffffffffffda RBX: 000055dbbbc6c1b0 RCX: 00007faa80392957
[ 856.937327][ C3] RDX: 0000000000000001 RSI: 000055dbbbc6c1b0 RDI: 0000000000000001
[ 856.937570][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 856.937817][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055dbbbc58590
[ 856.938060][ C3] R13: 000055dbbbc392a0 R14: 0000000000000001 R15: 000055dbbbc58590
[ 856.938326][ C3]
[ 856.938451][ C3] handlers:
[ 856.938576][ C3] [] serial8250_interrupt
[ 856.939151][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr