[ 935.514443][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 935.514815][ C3] CPU: 3 PID: 3698 Comm: perl Not tainted 6.9.0-virtme #1
[ 935.515020][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 935.515364][ C3] Call Trace:
[ 935.515488][ C3]
[ 935.515572][ C3] dump_stack_lvl+0x82/0xd0
[ 935.515749][ C3] __report_bad_irq+0x5f/0x180
[ 935.515909][ C3] note_interrupt+0x6b3/0x860
[ 935.516075][ C3] handle_irq_event+0x16d/0x1c0
[ 935.516235][ C3] handle_edge_irq+0x1fa/0xb60
[ 935.516409][ C3] __common_interrupt+0x82/0x170
[ 935.516566][ C3] common_interrupt+0x7e/0x90
[ 935.516725][ C3]
[ 935.516812][ C3]
[ 935.516892][ C3] asm_common_interrupt+0x26/0x40
[ 935.517046][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 935.517267][ C3] Code: 10 e8 d1 c5 93 fd 48 89 ef e8 49 36 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 e5 1c c8 4b <74> 0e 5b 5d c3 cc cc cc cc e8 bf a9 b7 fd eb dc 0f 1f 44 00 00 5b
[ 935.517833][ C3] RSP: 0018:ffffc9000106fa88 EFLAGS: 00000286
[ 935.518042][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff6eae77e
[ 935.518288][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb43bab31
[ 935.518572][ C3] RBP: ffffffffb7e54580 R08: 0000000000000001 R09: fffffbfff6ea98a8
[ 935.518812][ C3] R10: ffffffffb754c547 R11: 0000000000000000 R12: 000000000000067e
[ 935.519068][ C3] R13: ffffffffb7e54688 R14: ffffffffb7e54580 R15: ffff888004890000
[ 935.519325][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 935.519531][ C3] uart_write+0x224/0x450
[ 935.519658][ C3] process_output_block+0x13e/0x790
[ 935.519814][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 935.520019][ C3] n_tty_write+0x412/0x7a0
[ 935.520208][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 935.520386][ C3] ? trace_lock_acquire+0x14d/0x1f0
[ 935.520545][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 935.520712][ C3] ? iterate_tty_write+0x95/0x540
[ 935.520874][ C3] ? lock_acquire+0x32/0xc0
[ 935.521041][ C3] ? iterate_tty_write+0x95/0x540
[ 935.521211][ C3] iterate_tty_write+0x228/0x540
[ 935.521369][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 935.521534][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 935.521709][ C3] vfs_write+0x9dc/0x1070
[ 935.521834][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 935.522000][ C3] ? __pfx_vfs_write+0x10/0x10
[ 935.522173][ C3] ? clockevents_program_event+0xf6/0x300
[ 935.522355][ C3] ? __fget_light+0x53/0x1e0
[ 935.522540][ C3] ? clockevents_program_event+0x1ea/0x300
[ 935.522739][ C3] ksys_write+0xf5/0x1e0
[ 935.522868][ C3] ? __pfx_ksys_write+0x10/0x10
[ 935.523035][ C3] do_syscall_64+0xc3/0x1d0
[ 935.523207][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 935.523409][ C3] RIP: 0033:0x7f0d397d5957
[ 935.523586][ 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
[ 935.524126][ C3] RSP: 002b:00007fff08bc9dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 935.524358][ C3] RAX: ffffffffffffffda RBX: 0000560da1c35320 RCX: 00007f0d397d5957
[ 935.524595][ C3] RDX: 0000000000000001 RSI: 0000560da1c35320 RDI: 0000000000000001
[ 935.524833][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 935.525057][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000560da1c215c0
[ 935.525299][ C3] R13: 0000560da1c022a0 R14: 0000000000000001 R15: 0000560da1c215c0
[ 935.525542][ C3]
[ 935.525666][ C3] handlers:
[ 935.525788][ C3] [] serial8250_interrupt
[ 935.526154][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr