[ 916.907355][ C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 916.907736][ C3] CPU: 3 PID: 3816 Comm: perl Not tainted 6.9.0-rc5-virtme #1
[ 916.908005][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 916.908390][ C3] Call Trace:
[ 916.908528][ C3]
[ 916.908619][ C3] dump_stack_lvl+0x82/0xd0
[ 916.908803][ C3] __report_bad_irq+0x5f/0x180
[ 916.909014][ C3] note_interrupt+0x6b3/0x860
[ 916.909192][ C3] handle_irq_event+0x16d/0x1c0
[ 916.909363][ C3] handle_edge_irq+0x1fa/0xb60
[ 916.909543][ C3] __common_interrupt+0x7c/0x180
[ 916.909724][ C3] common_interrupt+0x7e/0x90
[ 916.909892][ C3]
[ 916.909986][ C3]
[ 916.910074][ C3] asm_common_interrupt+0x26/0x40
[ 916.910249][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 916.910471][ C3] Code: 10 e8 a1 a9 99 fd 48 89 ef e8 d9 19 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 b5 f8 4d 6d <74> 0e 5b 5d c3 cc cc cc cc e8 ef 15 bd fd eb dc 0f 1f 44 00 00 5b
[ 916.911082][ C3] RSP: 0018:ffffc90000d2fa80 EFLAGS: 00000286
[ 916.911307][ C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff2ba9b09
[ 916.911563][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff92b5cf61
[ 916.911810][ C3] RBP: ffffffff9662e220 R08: 0000000000000001 R09: fffffbfff2ba4cb0
[ 916.912067][ C3] R10: ffffffff95d26587 R11: 0000000000000000 R12: 0000000000000e9a
[ 916.912313][ C3] R13: ffffffff9662e328 R14: ffffffff9662e220 R15: ffff888002a20000
[ 916.912572][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 916.912787][ C3] uart_write+0x224/0x450
[ 916.912924][ C3] process_output_block+0x13e/0x790
[ 916.913090][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1af/0x370
[ 916.913303][ C3] n_tty_write+0x412/0x7a0
[ 916.913485][ C3] ? __pfx_n_tty_write+0x10/0x10
[ 916.913655][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 916.913828][ C3] ? __pfx_woken_wake_function+0x10/0x10
[ 916.913997][ C3] ? iterate_tty_write+0x95/0x540
[ 916.914169][ C3] ? lock_acquire+0x32/0xc0
[ 916.914341][ C3] ? iterate_tty_write+0x95/0x540
[ 916.914518][ C3] iterate_tty_write+0x228/0x540
[ 916.914702][ C3] ? tty_ldisc_ref_wait+0x28/0x80
[ 916.914881][ C3] file_tty_write.constprop.0+0x1db/0x370
[ 916.915060][ C3] vfs_write+0x9e5/0x10a0
[ 916.915194][ C3] ? __pfx___lock_release+0x10/0x10
[ 916.915370][ C3] ? trace_lock_acquire+0x135/0x1c0
[ 916.915542][ C3] ? lock_acquire+0x32/0xc0
[ 916.915713][ C3] ? __pfx_vfs_write+0x10/0x10
[ 916.915888][ C3] ? __might_fault+0x11b/0x170
[ 916.916062][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0
[ 916.916278][ C3] ? __fget_light+0x53/0x1e0
[ 916.916456][ C3] ksys_write+0xf5/0x1e0
[ 916.916585][ C3] ? __pfx_ksys_write+0x10/0x10
[ 916.916764][ C3] do_syscall_64+0xc3/0x1d0
[ 916.916938][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 916.917149][ C3] RIP: 0033:0x7f7961d58957
[ 916.917323][ 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
[ 916.917908][ C3] RSP: 002b:00007ffcb34b5198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 916.918172][ C3] RAX: ffffffffffffffda RBX: 000056341ff7e310 RCX: 00007f7961d58957
[ 916.918418][ C3] RDX: 0000000000000001 RSI: 000056341ff7e310 RDI: 0000000000000001
[ 916.918666][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 916.918925][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000056341ff6a5c0
[ 916.919181][ C3] R13: 000056341ff4b2a0 R14: 0000000000000001 R15: 000056341ff6a5c0
[ 916.919438][ C3]
[ 916.919565][ C3] handlers:
[ 916.919705][ C3] [] serial8250_interrupt
[ 916.920350][ C3] Disabling IRQ #4
WAIT TIMEOUT stderr
Ctrl-C stderr
Ctrl-C stderr
WAIT TIMEOUT stderr