[ 1099.369726][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 1099.370221][ C3] CPU: 3 UID: 0 PID: 3996 Comm: perl Not tainted 6.10.0-virtme #1 [ 1099.370514][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1099.371047][ C3] Call Trace: [ 1099.371198][ C3] <IRQ> [ 1099.371296][ C3] dump_stack_lvl+0x82/0xd0 [ 1099.371489][ C3] __report_bad_irq+0x5f/0x180 [ 1099.371661][ C3] note_interrupt+0x6b3/0x860 [ 1099.371844][ C3] handle_irq_event+0x16d/0x1c0 [ 1099.372015][ C3] handle_edge_irq+0x1fa/0xb60 [ 1099.372189][ C3] __common_interrupt+0x82/0x170 [ 1099.372360][ C3] common_interrupt+0x7e/0x90 [ 1099.372530][ C3] </IRQ> [ 1099.372624][ C3] <TASK> [ 1099.372711][ C3] asm_common_interrupt+0x26/0x40 [ 1099.372891][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 1099.373124][ C3] Code: 10 e8 91 39 8e fd 48 89 ef e8 39 aa 8e 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 95 80 c2 62 <74> 0e 5b 5d c3 cc cc cc cc e8 5f 77 b2 fd eb dc 0f 1f 44 00 00 5b [ 1099.373728][ C3] RSP: 0018:ffffc9000096fab8 EFLAGS: 00000286 [ 1099.373945][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff40f6ff7 [ 1099.374198][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9d414841 [ 1099.374451][ C3] RBP: ffffffffa1079320 R08: 0000000000000001 R09: fffffbfff40f2108 [ 1099.374710][ C3] R10: ffffffffa0790847 R11: 0000000000000000 R12: ffffffffa1079428 [ 1099.374967][ C3] R13: ffff888005eff000 R14: ffffffffa1079320 R15: 0000000000000282 [ 1099.375231][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 1099.375448][ C3] uart_write+0x13e/0x320 [ 1099.375582][ C3] process_output_block+0x13e/0x790 [ 1099.375761][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1099.375986][ C3] n_tty_write+0x412/0x7a0 [ 1099.376173][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 1099.376344][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 1099.376524][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 1099.376711][ C3] ? iterate_tty_write+0x95/0x540 [ 1099.376908][ C3] ? lock_acquire+0x32/0xc0 [ 1099.377079][ C3] ? iterate_tty_write+0x95/0x540 [ 1099.377279][ C3] iterate_tty_write+0x228/0x540 [ 1099.377451][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 1099.377643][ C3] file_tty_write.constprop.0+0x1db/0x370 [ 1099.377865][ C3] vfs_write+0xa1b/0x10b0 [ 1099.378024][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1099.378212][ C3] ? __pfx_vfs_write+0x10/0x10 [ 1099.378403][ C3] ? clockevents_program_event+0xf6/0x300 [ 1099.378624][ C3] ? __fget_light+0x53/0x1e0 [ 1099.378794][ C3] ? clockevents_program_event+0x1ea/0x300 [ 1099.379055][ C3] ksys_write+0xf5/0x1e0 [ 1099.379194][ C3] ? __pfx_ksys_write+0x10/0x10 [ 1099.379389][ C3] do_syscall_64+0xc1/0x1d0 [ 1099.379573][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1099.379843][ C3] RIP: 0033:0x7f14cde0d957 [ 1099.380039][ 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 [ 1099.380717][ C3] RSP: 002b:00007ffed06ef4b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1099.381022][ C3] RAX: ffffffffffffffda RBX: 000055c0a0e4c310 RCX: 00007f14cde0d957 [ 1099.381313][ C3] RDX: 0000000000000001 RSI: 000055c0a0e4c310 RDI: 0000000000000001 [ 1099.381610][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 1099.381901][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055c0a0e385c0 [ 1099.382177][ C3] R13: 000055c0a0e192a0 R14: 0000000000000001 R15: 000055c0a0e385c0 [ 1099.382465][ C3] </TASK> [ 1099.382619][ C3] handlers: [ 1099.382764][ C3] [<ffffffff9bd1e610>] serial8250_interrupt [ 1099.383190][ C3] Disabling IRQ #4