[ 934.998035][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 934.998447][ C3] CPU: 3 PID: 3818 Comm: perl Not tainted 6.8.0-virtme #1
[ 934.998661][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 934.999036][ C3] Call Trace:
[ 934.999164][ C3]
[ 934.999253][ C3] dump_stack_lvl+0x82/0xd0
[ 934.999436][ C3] __report_bad_irq+0x5f/0x180
[ 934.999608][ C3] note_interrupt+0x6b3/0x860
[ 934.999779][ C3] handle_irq_event+0x16d/0x1c0
[ 934.999945][ C3] handle_edge_irq+0x1fa/0xb60
[ 935.000115][ C3] __common_interrupt+0x7c/0x180
[ 935.000298][ C3] common_interrupt+0x7e/0x90
[ 935.000467][ C3]
[ 935.000571][ C3]
[ 935.000656][ C3] asm_common_interrupt+0x26/0x40
[ 935.000828][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 935.001047][ C3] Code: 10 e8 91 d9 9b fd 48 89 ef e8 c9 49 9c 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 4b 50 4f <74> 0e 5b 5d c3 cc cc cc cc e8 ef 42 bf fd eb dc 0f 1f 44 00 00 5b
[ 935.001632][ C3] RSP: 0018:ffffc900011bfa80 EFLAGS: 00000286
[ 935.001857][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff67a7d09
[ 935.002111][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb0b378a1
[ 935.002370][ C3] RBP: ffffffffb461f1a0 R08: 0000000000000001 R09: fffffbfff67a2eb0
[ 935.002624][ C3] R10: ffffffffb3d17587 R11: 0000000000000000 R12: 0000000000000753
[ 935.002876][ C3] R13: ffffffffb461f2a8 R14: ffffffffb461f1a0 R15: ffff888004390000
[ 935.003128][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 935.003336][ C3] uart_write+0x224/0x450
[ 935.003483][ C3] process_output_block+0x13e/0x790
[ 935.003655][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 935.003874][ C3] n_tty_write+0x412/0x7a0
[ 935.004046][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 935.004215][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 935.004383][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 935.004553][ C3] ? iterate_tty_write+0x95/0x540
[ 935.004732][ C3] ? lock_acquire+0x32/0xc0
[ 935.004913][ C3] ? iterate_tty_write+0x95/0x540
[ 935.005084][ C3] iterate_tty_write+0x228/0x540
[ 935.005262][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 935.005435][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 935.005610][ C3] vfs_write+0x9e5/0x10a0
[ 935.005750][ C3] ? __pfx___lock_release+0x10/0x10
[ 935.005926][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 935.006088][ C3] ? lock_acquire+0x32/0xc0
[ 935.006253][ C3] ? __pfx_vfs_write+0x10/0x10
[ 935.006426][ C3] ? __might_fault+0x11b/0x170
[ 935.006594][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0
[ 935.006807][ C3] ? __fget_light+0x53/0x1e0
[ 935.006982][ C3] ksys_write+0xf5/0x1e0
[ 935.007112][ C3] ? __pfx_ksys_write+0x10/0x10
[ 935.007294][ C3] do_syscall_64+0xc6/0x1e0
[ 935.007467][ C3] entry_SYSCALL_64_after_hwframe+0x6d/0x75
[ 935.007679][ C3] RIP: 0033:0x7f16e60fa957
[ 935.007856][ 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
[ 935.008428][ C3] RSP: 002b:00007ffe26569038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 935.008769][ C3] RAX: ffffffffffffffda RBX: 000055c52f9501b0 RCX: 00007f16e60fa957
[ 935.009010][ C3] RDX: 0000000000000001 RSI: 000055c52f9501b0 RDI: 0000000000000001
[ 935.009252][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 935.009494][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055c52f93c590
[ 935.009733][ C3] R13: 000055c52f91d2a0 R14: 0000000000000001 R15: 000055c52f93c590
[ 935.009992][ C3]
[ 935.010121][ C3] handlers:
[ 935.010247][ C3] [] serial8250_interrupt
[ 935.010582][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr