[ 819.305241][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 819.305627][ C3] CPU: 3 PID: 8890 Comm: perl Not tainted 6.9.0-rc2-virtme #1
[ 819.305868][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 819.306229][ C3] Call Trace:
[ 819.306349][ C3]
[ 819.306433][ C3] dump_stack_lvl+0x82/0xd0
[ 819.306609][ C3] __report_bad_irq+0x5f/0x180
[ 819.306767][ C3] note_interrupt+0x6b3/0x860
[ 819.306925][ C3] handle_irq_event+0x16d/0x1c0
[ 819.307092][ C3] handle_edge_irq+0x1fa/0xb60
[ 819.307257][ C3] __common_interrupt+0x7c/0x180
[ 819.307423][ C3] common_interrupt+0x7e/0x90
[ 819.307584][ C3]
[ 819.307671][ C3]
[ 819.307752][ C3] asm_common_interrupt+0x26/0x40
[ 819.307911][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 819.308108][ C3] Code: 10 e8 e1 f7 9a fd 48 89 ef e8 19 68 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 b5 6e ef 78 <74> 0e 5b 5d c3 cc cc cc cc e8 df 63 be fd eb dc 0f 1f 44 00 00 5b
[ 819.308663][ C3] RSP: 0018:ffffc90000b8fa80 EFLAGS: 00000286
[ 819.308865][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1468b3b
[ 819.309097][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff87145961
[ 819.309333][ C3] RBP: ffffffff8ac261a0 R08: 0000000000000001 R09: fffffbfff1463cb0
[ 819.309558][ C3] R10: ffffffff8a31e587 R11: 0000000000000000 R12: 00000000000008ce
[ 819.309781][ C3] R13: ffffffff8ac262a8 R14: ffffffff8ac261a0 R15: ffff8880034a0000
[ 819.310023][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 819.310223][ C3] uart_write+0x224/0x450
[ 819.310347][ C3] process_output_block+0x13e/0x790
[ 819.310507][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 819.310707][ C3] n_tty_write+0x412/0x7a0
[ 819.310866][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 819.311031][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 819.311187][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 819.311341][ C3] ? iterate_tty_write+0x95/0x540
[ 819.311492][ C3] ? lock_acquire+0x32/0xc0
[ 819.311654][ C3] ? iterate_tty_write+0x95/0x540
[ 819.311812][ C3] iterate_tty_write+0x228/0x540
[ 819.311971][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 819.312126][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 819.312305][ C3] vfs_write+0x9e5/0x10a0
[ 819.312431][ C3] ? __pfx___lock_release+0x10/0x10
[ 819.312594][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 819.312744][ C3] ? lock_acquire+0x32/0xc0
[ 819.312895][ C3] ? __pfx_vfs_write+0x10/0x10
[ 819.313053][ C3] ? __might_fault+0x11b/0x170
[ 819.313213][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0
[ 819.313407][ C3] ? __fget_light+0x53/0x1e0
[ 819.313568][ C3] ksys_write+0xf5/0x1e0
[ 819.313685][ C3] ? __pfx_ksys_write+0x10/0x10
[ 819.313847][ C3] do_syscall_64+0xc6/0x1e0
[ 819.314009][ C3] entry_SYSCALL_64_after_hwframe+0x72/0x7a
[ 819.314215][ C3] RIP: 0033:0x7f748d590957
[ 819.314373][ 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
[ 819.314901][ C3] RSP: 002b:00007fffbf217228 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 819.315132][ C3] RAX: ffffffffffffffda RBX: 0000556e2ca14070 RCX: 00007f748d590957
[ 819.315363][ C3] RDX: 0000000000000001 RSI: 0000556e2ca14070 RDI: 0000000000000001
[ 819.315590][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 819.315890][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000556e2ca00590
[ 819.316113][ C3] R13: 0000556e2c9e12a0 R14: 0000000000000001 R15: 0000556e2ca00590
[ 819.316350][ C3]
[ 819.316468][ C3] handlers:
[ 819.316589][ C3] [] serial8250_interrupt
[ 819.316886][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr