[ 987.930521][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 987.930892][ C3] CPU: 3 PID: 3689 Comm: perl Not tainted 6.9.0-rc6-virtme #1
[ 987.931152][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 987.931539][ C3] Call Trace:
[ 987.931673][ C3]
[ 987.931765][ C3] dump_stack_lvl+0x82/0xd0
[ 987.931995][ C3] __report_bad_irq+0x5f/0x180
[ 987.932171][ C3] note_interrupt+0x6b3/0x860
[ 987.932344][ C3] handle_irq_event+0x16d/0x1c0
[ 987.932562][ C3] handle_edge_irq+0x1fa/0xb60
[ 987.932730][ C3] __common_interrupt+0x7c/0x180
[ 987.932921][ C3] common_interrupt+0x7e/0x90
[ 987.933098][ C3]
[ 987.933182][ C3]
[ 987.933263][ C3] asm_common_interrupt+0x26/0x40
[ 987.933414][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 987.933618][ C3] Code: 10 e8 71 9f 99 fd 48 89 ef e8 a9 0f 9a 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 e6 4d 5f <74> 0e 5b 5d c3 cc cc cc cc e8 bf 09 bd fd eb dc 0f 1f 44 00 00 5b
[ 987.934172][ C3] RSP: 0018:ffffc90000f3fa80 EFLAGS: 00000286
[ 987.934372][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff47a9b54
[ 987.934667][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa0b5e121
[ 987.934902][ C3] RBP: ffffffffa462e220 R08: 0000000000000001 R09: fffffbfff47a4cb0
[ 987.935137][ C3] R10: ffffffffa3d26587 R11: 0000000000000000 R12: 0000000000000598
[ 987.935370][ C3] R13: ffffffffa462e328 R14: ffffffffa462e220 R15: ffff888002770000
[ 987.935611][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 987.935813][ C3] uart_write+0x224/0x450
[ 987.935942][ C3] process_output_block+0x13e/0x790
[ 987.936099][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 987.936293][ C3] n_tty_write+0x412/0x7a0
[ 987.936454][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 987.936606][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 987.936759][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 987.936920][ C3] ? iterate_tty_write+0x95/0x540
[ 987.937078][ C3] ? lock_acquire+0x32/0xc0
[ 987.937233][ C3] ? iterate_tty_write+0x95/0x540
[ 987.937392][ C3] iterate_tty_write+0x228/0x540
[ 987.937549][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 987.937708][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 987.937867][ C3] vfs_write+0x9e5/0x10a0
[ 987.937987][ C3] ? __pfx___lock_release+0x10/0x10
[ 987.938142][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10
[ 987.938303][ C3] ? __pfx_vfs_write+0x10/0x10
[ 987.938463][ C3] ? clockevents_program_event+0xf6/0x300
[ 987.938625][ C3] ? ktime_get+0xb3/0x190
[ 987.938748][ C3] ? __fget_light+0x53/0x1e0
[ 987.938902][ C3] ? clockevents_program_event+0x1ea/0x300
[ 987.939099][ C3] ksys_write+0xf5/0x1e0
[ 987.939228][ C3] ? __pfx_ksys_write+0x10/0x10
[ 987.939393][ C3] do_syscall_64+0xc3/0x1d0
[ 987.939548][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 987.939736][ C3] RIP: 0033:0x7fa7c0afd957
[ 987.939899][ 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
[ 987.940439][ C3] RSP: 002b:00007fffeec005d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 987.940688][ C3] RAX: ffffffffffffffda RBX: 000055c724fe31d0 RCX: 00007fa7c0afd957
[ 987.940913][ C3] RDX: 0000000000000001 RSI: 000055c724fe31d0 RDI: 0000000000000001
[ 987.941140][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 987.941362][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055c724fcf5c0
[ 987.941586][ C3] R13: 000055c724fb02a0 R14: 0000000000000001 R15: 000055c724fcf5c0
[ 987.941829][ C3]
[ 987.941944][ C3] handlers:
[ 987.942063][ C3] [] serial8250_interrupt
[ 987.942379][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr