[ 1860.661066][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 1860.661438][ C3] CPU: 3 UID: 0 PID: 10634 Comm: perl Not tainted 6.12.0-rc3-virtme #1 [ 1860.661689][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1860.662049][ C3] Call Trace: [ 1860.662180][ C3] <IRQ> [ 1860.662271][ C3] dump_stack_lvl+0x82/0xd0 [ 1860.662449][ C3] __report_bad_irq+0x5f/0x180 [ 1860.662619][ C3] note_interrupt+0x6b3/0x860 [ 1860.662784][ C3] handle_irq_event+0x16d/0x1c0 [ 1860.662947][ C3] handle_edge_irq+0x1fa/0xb60 [ 1860.663115][ C3] __common_interrupt+0x82/0x170 [ 1860.663280][ C3] common_interrupt+0x81/0xa0 [ 1860.663442][ C3] </IRQ> [ 1860.663535][ C3] <TASK> [ 1860.663622][ C3] asm_common_interrupt+0x26/0x40 [ 1860.663780][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 1860.663998][ 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 db 52 <74> 0e 5b 5d c3 cc cc cc cc e8 1f dc ac fd eb dc 0f 1f 44 00 00 5b [ 1860.664570][ C3] RSP: 0018:ffffc9000195faa0 EFLAGS: 00000286 [ 1860.664773][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff60be88d [ 1860.665016][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffad28c1f1 [ 1860.665251][ C3] RBP: ffffffffb0eb83e0 R08: 0000000000000001 R09: fffffbfff60b99d0 [ 1860.665486][ C3] R10: ffffffffb05cce87 R11: 0000000000000000 R12: 00000000ffffffff [ 1860.665725][ C3] R13: 0000000000000001 R14: ffffffffb0eb84e8 R15: 00000000ffffffff [ 1860.665978][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 1860.666196][ C3] uart_write+0x220/0x920 [ 1860.666325][ C3] process_output_block+0x13e/0x790 [ 1860.666491][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1860.666698][ C3] n_tty_write+0x40c/0x790 [ 1860.666866][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 1860.667025][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 1860.667187][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 1860.667351][ C3] ? iterate_tty_write+0x8f/0x540 [ 1860.667517][ C3] ? lock_acquire+0x32/0xc0 [ 1860.667676][ C3] ? iterate_tty_write+0x8f/0x540 [ 1860.667850][ C3] iterate_tty_write+0x222/0x540 [ 1860.668012][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 1860.668179][ C3] file_tty_write.constprop.0+0x1cf/0x360 [ 1860.668342][ C3] vfs_write+0xa77/0x11d0 [ 1860.668463][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1860.668633][ C3] ? __pfx_vfs_write+0x10/0x10 [ 1860.668793][ C3] ? clockevents_program_event+0xf6/0x300 [ 1860.668971][ C3] ksys_write+0xf5/0x1e0 [ 1860.669092][ C3] ? __pfx_ksys_write+0x10/0x10 [ 1860.669259][ C3] do_syscall_64+0xc1/0x1d0 [ 1860.669421][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1860.669619][ C3] RIP: 0033:0x7f9655e99957 [ 1860.669784][ 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 [ 1860.670340][ C3] RSP: 002b:00007fff84d85c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1860.670586][ C3] RAX: ffffffffffffffda RBX: 000056117820a1f0 RCX: 00007f9655e99957 [ 1860.670816][ C3] RDX: 0000000000000001 RSI: 000056117820a1f0 RDI: 0000000000000001 [ 1860.671052][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 1860.671288][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 00005611781f55e0 [ 1860.671520][ C3] R13: 00005611781d62a0 R14: 0000000000000001 R15: 00005611781f55e0 [ 1860.671765][ C3] </TASK> [ 1860.671885][ C3] handlers: [ 1860.672007][ C3] [<ffffffffabb6e4f0>] serial8250_interrupt [ 1860.672359][ C3] Disabling IRQ #4