[ 989.212526][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 989.212916][ C3] CPU: 3 PID: 3593 Comm: perl Not tainted 6.10.0-rc1-virtme #1 [ 989.213152][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 989.213500][ C3] Call Trace: [ 989.213625][ C3] <IRQ> [ 989.213710][ C3] dump_stack_lvl+0x82/0xd0 [ 989.213879][ C3] __report_bad_irq+0x5f/0x180 [ 989.214038][ C3] note_interrupt+0x6b3/0x860 [ 989.214200][ C3] handle_irq_event+0x16d/0x1c0 [ 989.214353][ C3] handle_edge_irq+0x1fa/0xb60 [ 989.214512][ C3] __common_interrupt+0x82/0x170 [ 989.214675][ C3] common_interrupt+0x7e/0x90 [ 989.214829][ C3] </IRQ> [ 989.214910][ C3] <TASK> [ 989.214990][ C3] asm_common_interrupt+0x26/0x40 [ 989.215151][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 989.215363][ C3] Code: 10 e8 91 51 93 fd 48 89 ef e8 09 c2 93 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 b1 a7 74 <74> 0e 5b 5d c3 cc cc cc cc e8 1f 33 b7 fd eb dc 0f 1f 44 00 00 5b [ 989.215912][ C3] RSP: 0018:ffffc9000303fac0 EFLAGS: 00000286 [ 989.216108][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1cef54c [ 989.216338][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8b5c16a1 [ 989.216567][ C3] RBP: ffffffff8f03c020 R08: 0000000000000001 R09: fffffbfff1cea6a8 [ 989.216795][ C3] R10: ffffffff8e753547 R11: 0000000000000000 R12: 0000000000000001 [ 989.217024][ C3] R13: 0000000000000282 R14: ffffffff8f03c020 R15: ffff888006cbb800 [ 989.217272][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 989.217476][ C3] uart_write+0x13d/0x330 [ 989.217602][ C3] process_output_block+0x13e/0x790 [ 989.217770][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 989.217969][ C3] n_tty_write+0x412/0x7a0 [ 989.218152][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 989.218303][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 989.218463][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 989.218621][ C3] ? iterate_tty_write+0x95/0x540 [ 989.218778][ C3] ? lock_acquire+0x32/0xc0 [ 989.218935][ C3] ? iterate_tty_write+0x95/0x540 [ 989.219097][ C3] iterate_tty_write+0x228/0x540 [ 989.219261][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 989.219424][ C3] file_tty_write.constprop.0+0x1db/0x370 [ 989.219589][ C3] vfs_write+0xa18/0x10b0 [ 989.219714][ C3] ? __pfx___lock_release+0x10/0x10 [ 989.219872][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 989.220025][ C3] ? __might_fault+0xc3/0x170 [ 989.220178][ C3] ? lock_acquire+0x32/0xc0 [ 989.220331][ C3] ? __pfx_vfs_write+0x10/0x10 [ 989.220493][ C3] ? __might_fault+0x11b/0x170 [ 989.220653][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0 [ 989.220846][ C3] ? __fget_light+0x53/0x1e0 [ 989.221020][ C3] ksys_write+0xf5/0x1e0 [ 989.221144][ C3] ? __pfx_ksys_write+0x10/0x10 [ 989.221316][ C3] do_syscall_64+0xc1/0x1d0 [ 989.221490][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 989.221698][ C3] RIP: 0033:0x7f6a80954957 [ 989.221870][ 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 [ 989.222477][ C3] RSP: 002b:00007ffced0aafc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 989.222750][ C3] RAX: ffffffffffffffda RBX: 0000556346b431d0 RCX: 00007f6a80954957 [ 989.222996][ C3] RDX: 0000000000000001 RSI: 0000556346b431d0 RDI: 0000000000000001 [ 989.223235][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 989.223478][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000556346b2f5c0 [ 989.223717][ C3] R13: 0000556346b102a0 R14: 0000000000000001 R15: 0000556346b2f5c0 [ 989.223983][ C3] </TASK> [ 989.224109][ C3] handlers: [ 989.224234][ C3] [<ffffffff89ef6150>] serial8250_interrupt [ 989.224582][ C3] Disabling IRQ #4