[ 1635.649626][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 1635.650007][ C3] CPU: 3 PID: 10726 Comm: perl Not tainted 6.9.0-virtme #1 [ 1635.650246][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1635.650599][ C3] Call Trace: [ 1635.650722][ C3] [ 1635.650805][ C3] dump_stack_lvl+0x82/0xd0 [ 1635.650985][ C3] __report_bad_irq+0x5f/0x180 [ 1635.651148][ C3] note_interrupt+0x6b3/0x860 [ 1635.651309][ C3] handle_irq_event+0x16d/0x1c0 [ 1635.651465][ C3] handle_edge_irq+0x1fa/0xb60 [ 1635.651623][ C3] __common_interrupt+0x82/0x170 [ 1635.651780][ C3] common_interrupt+0x7e/0x90 [ 1635.651944][ C3] [ 1635.652026][ C3] [ 1635.652111][ C3] asm_common_interrupt+0x26/0x40 [ 1635.652266][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 1635.652470][ C3] Code: 10 e8 d1 c0 93 fd 48 89 ef e8 49 31 94 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 45 21 48 68 <74> 0e 5b 5d c3 cc cc cc cc e8 ef a0 b7 fd eb dc 0f 1f 44 00 00 5b [ 1635.653015][ C3] RSP: 0018:ffffc9000354fac0 EFLAGS: 00000286 [ 1635.653217][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff35aef65 [ 1635.653447][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff97bba6d1 [ 1635.653672][ C3] RBP: ffffffff9b639020 R08: 0000000000000001 R09: fffffbfff35aa0a8 [ 1635.653915][ C3] R10: ffffffff9ad50547 R11: 0000000000000000 R12: 0000000000000001 [ 1635.654146][ C3] R13: 0000000000000282 R14: ffffffff9b639020 R15: ffff888006ede800 [ 1635.654393][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 1635.654604][ C3] uart_write+0x13d/0x330 [ 1635.654726][ C3] process_output_block+0x13e/0x790 [ 1635.654886][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1635.655080][ C3] n_tty_write+0x412/0x7a0 [ 1635.655242][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 1635.655399][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 1635.655560][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 1635.655716][ C3] ? iterate_tty_write+0x95/0x540 [ 1635.655877][ C3] ? lock_acquire+0x32/0xc0 [ 1635.656058][ C3] ? iterate_tty_write+0x95/0x540 [ 1635.656220][ C3] iterate_tty_write+0x228/0x540 [ 1635.656380][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 1635.656547][ C3] file_tty_write.constprop.0+0x1db/0x370 [ 1635.656706][ C3] vfs_write+0xa18/0x10b0 [ 1635.656830][ C3] ? __pfx___lock_release+0x10/0x10 [ 1635.656980][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 1635.657136][ C3] ? __might_fault+0xc3/0x170 [ 1635.657297][ C3] ? lock_acquire+0x32/0xc0 [ 1635.657451][ C3] ? __pfx_vfs_write+0x10/0x10 [ 1635.657620][ C3] ? __might_fault+0x11b/0x170 [ 1635.657794][ C3] ? __rseq_handle_notify_resume+0x354/0x4e0 [ 1635.657990][ C3] ? __fget_light+0x53/0x1e0 [ 1635.658154][ C3] ksys_write+0xf5/0x1e0 [ 1635.658276][ C3] ? __pfx_ksys_write+0x10/0x10 [ 1635.658444][ C3] do_syscall_64+0xc1/0x1d0 [ 1635.658601][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1635.658800][ C3] RIP: 0033:0x7f7e1e50b957 [ 1635.658963][ 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 [ 1635.659489][ C3] RSP: 002b:00007ffd62763598 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1635.659731][ C3] RAX: ffffffffffffffda RBX: 0000556b9ac7f1d0 RCX: 00007f7e1e50b957 [ 1635.659960][ C3] RDX: 0000000000000001 RSI: 0000556b9ac7f1d0 RDI: 0000000000000001 [ 1635.660195][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 1635.660434][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 0000556b9ac6b5c0 [ 1635.660680][ C3] R13: 0000556b9ac4c2a0 R14: 0000000000000001 R15: 0000556b9ac6b5c0 [ 1635.660926][ C3] [ 1635.661065][ C3] handlers: [ 1635.661187][ C3] [] serial8250_interrupt [ 1635.661951][ C3] Disabling IRQ #4