[ 2200.279631][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 2200.279981][ C3] CPU: 3 PID: 6238 Comm: perl Not tainted 6.8.0-rc5-virtme #1 [ 2200.280232][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 2200.280593][ C3] Call Trace: [ 2200.280728][ C3] <IRQ> [ 2200.280828][ C3] dump_stack_lvl+0x64/0xb0 [ 2200.281002][ C3] __report_bad_irq+0x5f/0x180 [ 2200.281173][ C3] note_interrupt+0x6b3/0x860 [ 2200.281343][ C3] handle_irq_event+0x16d/0x1c0 [ 2200.281508][ C3] handle_edge_irq+0x1fa/0xb60 [ 2200.281678][ C3] __common_interrupt+0x7c/0x180 [ 2200.281844][ C3] common_interrupt+0x7e/0x90 [ 2200.282005][ C3] </IRQ> [ 2200.282090][ C3] <TASK> [ 2200.282176][ C3] asm_common_interrupt+0x26/0x40 [ 2200.282337][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 2200.282544][ C3] Code: 10 e8 d1 25 a4 fd 48 89 ef e8 f9 91 a4 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 f5 b7 39 78 <74> 0e 5b 5d c3 cc cc cc cc e8 1f 4e c6 fd eb dc 0f 1f 44 00 00 5b [ 2200.283112][ C3] RSP: 0018:ffffc900014efa88 EFLAGS: 00000286 [ 2200.283321][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff15d8ad1 [ 2200.283577][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff87c9fae1 [ 2200.283816][ C3] RBP: ffffffff8b7a3d20 R08: 0000000000000001 R09: fffffbfff15d3c78 [ 2200.284060][ C3] R10: ffffffff8ae9e3c7 R11: 0000000000000000 R12: 00000000000009b9 [ 2200.284302][ C3] R13: ffffffff8b7a3e28 R14: ffffffff8b7a3d20 R15: ffff8880052a0000 [ 2200.284547][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 2200.284773][ C3] uart_write+0x220/0x440 [ 2200.284902][ C3] process_output_block+0x13e/0x790 [ 2200.285066][ C3] ? lockdep_hardirqs_on_prepare.part.0+0x1b1/0x370 [ 2200.285265][ C3] n_tty_write+0x414/0x7a0 [ 2200.285431][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 2200.285604][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 2200.285764][ C3] ? lock_acquire+0x1c1/0x220 [ 2200.285926][ C3] ? iterate_tty_write+0x95/0x540 [ 2200.286095][ C3] iterate_tty_write+0x229/0x540 [ 2200.286259][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 2200.286429][ C3] file_tty_write.constprop.0+0x1db/0x370 [ 2200.286589][ C3] vfs_write+0x9e9/0x10a0 [ 2200.286720][ C3] ? lock_acquire+0x1c1/0x220 [ 2200.286892][ C3] ? __pfx_vfs_write+0x10/0x10 [ 2200.287052][ C3] ? __might_fault+0xc6/0x180 [ 2200.287221][ C3] ? __fget_light+0x54/0x1e0 [ 2200.287384][ C3] ksys_write+0xf5/0x1e0 [ 2200.287508][ C3] ? __pfx_ksys_write+0x10/0x10 [ 2200.287675][ C3] do_syscall_64+0xc9/0x1e0 [ 2200.287843][ C3] entry_SYSCALL_64_after_hwframe+0x6f/0x77 [ 2200.288041][ C3] RIP: 0033:0x7f1bd2854957 [ 2200.288206][ 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 [ 2200.288746][ C3] RSP: 002b:00007ffd7ddc5828 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 2200.289001][ C3] RAX: ffffffffffffffda RBX: 0000564698dff0f0 RCX: 00007f1bd2854957 [ 2200.289233][ C3] RDX: 0000000000000001 RSI: 0000564698dff0f0 RDI: 0000000000000001 [ 2200.289464][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 2200.289700][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000564698deb590 [ 2200.289930][ C3] R13: 0000564698dcc2a0 R14: 0000000000000001 R15: 0000564698deb590 [ 2200.290174][ C3] </TASK> [ 2200.290301][ C3] handlers: [ 2200.290423][ C3] [<ffffffff86677420>] serial8250_interrupt [ 2200.290788][ C3] Disabling IRQ #4 WAIT TIMEOUT stderr Ctrl-C stderr Ctrl-C stderr WAIT TIMEOUT stderr