[ 1926.510240][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1926.510728][    C3] CPU: 3 UID: 0 PID: 10347 Comm: perl Not tainted 6.12.0-rc3-virtme #1
[ 1926.510992][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1926.511391][    C3] Call Trace:
[ 1926.511534][    C3]  <IRQ>
[ 1926.511628][    C3]  dump_stack_lvl+0x82/0xd0
[ 1926.511817][    C3]  __report_bad_irq+0x5f/0x180
[ 1926.512000][    C3]  note_interrupt+0x6b3/0x860
[ 1926.512181][    C3]  handle_irq_event+0x16d/0x1c0
[ 1926.512361][    C3]  handle_edge_irq+0x1fa/0xb60
[ 1926.512543][    C3]  __common_interrupt+0x82/0x170
[ 1926.512733][    C3]  common_interrupt+0x81/0xa0
[ 1926.512909][    C3]  </IRQ>
[ 1926.513001][    C3]  <TASK>
[ 1926.513092][    C3]  asm_common_interrupt+0x26/0x40
[ 1926.513280][    C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70
[ 1926.513520][    C3] Code: 10 e8 51 99 87 fd 48 89 ef e8 69 0a 88 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 06 1b 74 <74> 0e 5b 5d c3 cc cc cc cc e8 1f dc ac fd eb dc 0f 1f 44 00 00 5b
[ 1926.514147][    C3] RSP: 0018:ffffc900012efaa0 EFLAGS: 00000286
[ 1926.514367][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1e3e8a6
[ 1926.514639][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8be8c1f1
[ 1926.514902][    C3] RBP: ffffffff8fab83e0 R08: 0000000000000001 R09: fffffbfff1e399d0
[ 1926.515160][    C3] R10: ffffffff8f1cce87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1926.515420][    C3] R13: 0000000000000001 R14: ffffffff8fab84e8 R15: 00000000ffffffff
[ 1926.515696][    C3]  ? _raw_spin_unlock_irqrestore+0x51/0x70
[ 1926.515927][    C3]  uart_write+0x220/0x920
[ 1926.516069][    C3]  process_output_block+0x13e/0x790
[ 1926.516251][    C3]  ? lockdep_hardirqs_on_prepare+0x275/0x410
[ 1926.516472][    C3]  n_tty_write+0x40c/0x790
[ 1926.516652][    C3]  ? __pfx_n_tty_write+0x10/0x10
[ 1926.516824][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1926.517007][    C3]  ? __pfx_woken_wake_function+0x10/0x10
[ 1926.517180][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1926.517356][    C3]  ? lock_acquire+0x32/0xc0
[ 1926.517531][    C3]  ? iterate_tty_write+0x8f/0x540
[ 1926.517710][    C3]  iterate_tty_write+0x222/0x540
[ 1926.517897][    C3]  ? tty_ldisc_ref_wait+0x28/0x80
[ 1926.518078][    C3]  file_tty_write.constprop.0+0x1cf/0x360
[ 1926.518254][    C3]  vfs_write+0xa77/0x11d0
[ 1926.518398][    C3]  ? __pfx___lock_release+0x10/0x10
[ 1926.518573][    C3]  ? trace_lock_acquire+0x14d/0x1f0
[ 1926.518748][    C3]  ? __might_fault+0xc3/0x170
[ 1926.518933][    C3]  ? lock_acquire+0x32/0xc0
[ 1926.519112][    C3]  ? __pfx_vfs_write+0x10/0x10
[ 1926.519300][    C3]  ? __might_fault+0x11b/0x170
[ 1926.519485][    C3]  ? __rseq_handle_notify_resume+0x354/0x4e0
[ 1926.519723][    C3]  ksys_write+0xf5/0x1e0
[ 1926.519861][    C3]  ? __pfx_ksys_write+0x10/0x10
[ 1926.520044][    C3]  do_syscall_64+0xc1/0x1d0
[ 1926.520222][    C3]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 1926.520522][    C3] RIP: 0033:0x7f2625283957
[ 1926.520706][    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
[ 1926.521307][    C3] RSP: 002b:00007fffa6927678 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1926.521571][    C3] RAX: ffffffffffffffda RBX: 0000557cf77e03f0 RCX: 00007f2625283957
[ 1926.521842][    C3] RDX: 0000000000000001 RSI: 0000557cf77e03f0 RDI: 0000000000000001
[ 1926.522095][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1926.522351][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000557cf77cb5e0
[ 1926.522607][    C3] R13: 0000557cf77ac2a0 R14: 0000000000000001 R15: 0000557cf77cb5e0
[ 1926.522875][    C3]  </TASK>
[ 1926.523007][    C3] handlers:
[ 1926.523148][    C3] [<ffffffff8a76e4f0>] serial8250_interrupt
[ 1926.523534][    C3] Disabling IRQ #4