[ 937.704629][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 937.705015][ C3] CPU: 3 PID: 3389 Comm: perl Not tainted 6.9.0-virtme #1
[ 937.705238][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 937.705637][ C3] Call Trace:
[ 937.705772][ C3]
[ 937.705863][ C3] dump_stack_lvl+0x82/0xd0
[ 937.706047][ C3] __report_bad_irq+0x5f/0x180
[ 937.706230][ C3] note_interrupt+0x6b3/0x860
[ 937.706418][ C3] handle_irq_event+0x16d/0x1c0
[ 937.706597][ C3] handle_edge_irq+0x1fa/0xb60
[ 937.706772][ C3] __common_interrupt+0x82/0x170
[ 937.706944][ C3] common_interrupt+0x7e/0x90
[ 937.707118][ C3]
[ 937.707208][ C3]
[ 937.707299][ C3] asm_common_interrupt+0x26/0x40
[ 937.707477][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 937.707695][ C3] Code: 10 e8 e1 d5 93 fd 48 89 ef e8 59 46 94 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 f5 2c e8 4c <74> 0e 5b 5d c3 cc cc cc cc e8 cf b9 b7 fd eb dc 0f 1f 44 00 00 5b
[ 937.708282][ C3] RSP: 0018:ffffc9000067fa88 EFLAGS: 00000286
[ 937.708498][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff6c6e797
[ 937.708750][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb31b9b21
[ 937.709000][ C3] RBP: ffffffffb6c54580 R08: 0000000000000001 R09: fffffbfff6c698a8
[ 937.709253][ C3] R10: ffffffffb634c547 R11: 0000000000000000 R12: 0000000000000530
[ 937.709503][ C3] R13: ffffffffb6c54688 R14: ffffffffb6c54580 R15: ffff888004990000
[ 937.709771][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 937.709989][ C3] uart_write+0x224/0x450
[ 937.710128][ C3] process_output_block+0x13e/0x790
[ 937.710309][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 937.710527][ C3] n_tty_write+0x412/0x7a0
[ 937.710706][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 937.710887][ C3] ? trace_lock_acquire+0x14d/0x1f0
[ 937.711056][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 937.711225][ C3] ? iterate_tty_write+0x95/0x540
[ 937.711434][ C3] ? lock_acquire+0x32/0xc0
[ 937.711604][ C3] ? iterate_tty_write+0x95/0x540
[ 937.711779][ C3] iterate_tty_write+0x228/0x540
[ 937.711950][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 937.712121][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 937.712301][ C3] vfs_write+0x9dc/0x1070
[ 937.712434][ C3] ? __pfx___lock_release+0x10/0x10
[ 937.712603][ C3] ? trace_lock_acquire+0x14d/0x1f0
[ 937.712770][ C3] ? __might_fault+0xc3/0x170
[ 937.712948][ C3] ? lock_acquire+0x32/0xc0
[ 937.713119][ C3] ? __pfx_vfs_write+0x10/0x10
[ 937.713299][ C3] ? __might_fault+0x11b/0x170
[ 937.713471][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0
[ 937.713683][ C3] ? __fget_light+0x53/0x1e0
[ 937.713864][ C3] ksys_write+0xf5/0x1e0
[ 937.713993][ C3] ? __pfx_ksys_write+0x10/0x10
[ 937.714169][ C3] do_syscall_64+0xc3/0x1d0
[ 937.714345][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 937.714565][ C3] RIP: 0033:0x7fb06b08d957
[ 937.714737][ 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
[ 937.715343][ C3] RSP: 002b:00007fff0bdb02c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 937.715609][ C3] RAX: ffffffffffffffda RBX: 00005608103db320 RCX: 00007fb06b08d957
[ 937.715866][ C3] RDX: 0000000000000001 RSI: 00005608103db320 RDI: 0000000000000001
[ 937.716125][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 937.716381][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005608103c75c0
[ 937.716628][ C3] R13: 00005608103a82a0 R14: 0000000000000001 R15: 00005608103c75c0
[ 937.716911][ C3]
[ 937.717039][ C3] handlers:
[ 937.717167][ C3] [] serial8250_interrupt
[ 937.717555][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr