[ 924.464652][ C3] irq 4: nobody cared (try booting with the "irqpoll" option) [ 924.465051][ C3] CPU: 3 PID: 3612 Comm: perl Not tainted 6.10.0-rc1-virtme #1 [ 924.465284][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 924.465630][ C3] Call Trace: [ 924.465755][ C3] [ 924.465838][ C3] dump_stack_lvl+0x82/0xd0 [ 924.466389][ C3] __report_bad_irq+0x5f/0x180 [ 924.466549][ C3] note_interrupt+0x6b3/0x860 [ 924.466713][ C3] handle_irq_event+0x16d/0x1c0 [ 924.466881][ C3] handle_edge_irq+0x1fa/0xb60 [ 924.467044][ C3] __common_interrupt+0x82/0x170 [ 924.467207][ C3] common_interrupt+0x7e/0x90 [ 924.467371][ C3] [ 924.467455][ C3] [ 924.467535][ C3] asm_common_interrupt+0x26/0x40 [ 924.467691][ C3] RIP: 0010:_raw_spin_unlock_irqrestore+0x43/0x70 [ 924.467908][ C3] Code: 10 e8 41 81 93 fd 48 89 ef e8 b9 f1 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 55 e1 e7 57 <74> 0e 5b 5d c3 cc cc cc cc e8 cf 62 b7 fd eb dc 0f 1f 44 00 00 5b [ 924.468451][ C3] RSP: 0018:ffffc9000341fac0 EFLAGS: 00000286 [ 924.468671][ C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff566f533 [ 924.468921][ C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa81be6c1 [ 924.469160][ C3] RBP: ffffffffabc3c020 R08: 0000000000000001 R09: fffffbfff566a6a8 [ 924.469397][ C3] R10: ffffffffab353547 R11: 0000000000000000 R12: 0000000000000001 [ 924.469649][ C3] R13: 0000000000000282 R14: ffffffffabc3c020 R15: ffff888005706800 [ 924.469904][ C3] ? _raw_spin_unlock_irqrestore+0x51/0x70 [ 924.470110][ C3] uart_write+0x13d/0x330 [ 924.470239][ C3] process_output_block+0x13e/0x790 [ 924.470400][ C3] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 924.470597][ C3] n_tty_write+0x412/0x7a0 [ 924.470759][ C3] ? __pfx_n_tty_write+0x10/0x10 [ 924.470918][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 924.471070][ C3] ? __pfx_woken_wake_function+0x10/0x10 [ 924.471233][ C3] ? iterate_tty_write+0x95/0x540 [ 924.471390][ C3] ? lock_acquire+0x32/0xc0 [ 924.471554][ C3] ? iterate_tty_write+0x95/0x540 [ 924.471716][ C3] iterate_tty_write+0x228/0x540 [ 924.471880][ C3] ? tty_ldisc_ref_wait+0x28/0x80 [ 924.472035][ C3] file_tty_write.constprop.0+0x1db/0x370 [ 924.472200][ C3] vfs_write+0xa18/0x10b0 [ 924.472320][ C3] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 924.472475][ C3] ? __pfx_vfs_write+0x10/0x10 [ 924.472642][ C3] ? clockevents_program_event+0xf6/0x300 [ 924.472812][ C3] ? __fget_light+0x53/0x1e0 [ 924.472974][ C3] ? clockevents_program_event+0x1ea/0x300 [ 924.473195][ C3] ksys_write+0xf5/0x1e0 [ 924.473314][ C3] ? __pfx_ksys_write+0x10/0x10 [ 924.473475][ C3] do_syscall_64+0xc1/0x1d0 [ 924.473634][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 924.473836][ C3] RIP: 0033:0x7fb2a9964957 [ 924.473998][ 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 [ 924.474562][ C3] RSP: 002b:00007ffd05d864d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 924.474813][ C3] RAX: ffffffffffffffda RBX: 000055acb1871310 RCX: 00007fb2a9964957 [ 924.475045][ C3] RDX: 0000000000000001 RSI: 000055acb1871310 RDI: 0000000000000001 [ 924.475279][ C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000 [ 924.475518][ C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055acb185d5c0 [ 924.475761][ C3] R13: 000055acb183e2a0 R14: 0000000000000001 R15: 000055acb185d5c0 [ 924.476039][ C3] [ 924.476155][ C3] handlers: [ 924.476272][ C3] [] serial8250_interrupt [ 924.476896][ C3] Disabling IRQ #4