======================================
| 0
| xx__->
| [  924.174178][ T9872] Mirror/redirect action on
| [  945.841463][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[  945.842139][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  945.842499][    C3] Call Trace:
[  945.842621][    C3]  <IRQ>
[ 945.842704][ C3] dump_stack_lvl (lib/dump_stack.c:117) 
[ 945.842878][ C3] __report_bad_irq (kernel/irq/spurious.c:214) 
[ 945.843037][ C3] note_interrupt (kernel/irq/spurious.c:423) 
[ 945.843207][ C3] handle_irq_event (kernel/irq/handle.c:198 kernel/irq/handle.c:210) 
[ 945.843362][ C3] handle_edge_irq (kernel/irq/chip.c:833) 
[ 945.843524][ C3] __common_interrupt (./include/linux/irqdesc.h:173 arch/x86/kernel/irq.c:247 arch/x86/kernel/irq.c:259 arch/x86/kernel/irq.c:285) 
[ 945.843681][ C3] common_interrupt (arch/x86/kernel/irq.c:278 (discriminator 14)) 
[  945.843842][    C3]  </IRQ>
[  945.843923][    C3]  <TASK>
[ 945.844007][ C3] asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) 
[ 945.844159][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 945.844357][ C3] Code: 10 e8 81 4e 92 fd 48 89 ef e8 f9 be 92 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 a5 ae 26 72 <74> 0e 5b 5d c3 cc cc cc cc e8 2f 30 b6 fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	81 4e 92 fd 48 89 ef 	orl    $0xef8948fd,-0x6e(%rsi)
   9:	e8 f9 be 92 fd       	call   0xfffffffffd92bf07
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d a5 ae 26 72 	decl   %gs:0x7226aea5(%rip)        # 0x7226aecf
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 2f 30 b6 fd       	call   0xfffffffffdb63067
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 2f 30 b6 fd       	call   0xfffffffffdb6303d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[  945.844911][    C3] RSP: 0018:ffffc90004a3fac0 EFLAGS: 00000286
[  945.845126][    C3] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff21f031a
[  945.845379][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8ddd19b1
[  945.845640][    C3] RBP: ffffffff91843060 R08: 0000000000000001 R09: fffffbfff21eb4a8
[  945.845883][    C3] R10: ffffffff90f5a547 R11: 0000000000000000 R12: 0000000000000001
[  945.846136][    C3] R13: 0000000000000286 R14: ffffffff91843060 R15: ffff888004ad0800
[ 945.846375][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 945.846615][ C3] uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:634) 
[ 945.846759][ C3] process_output_block (drivers/tty/n_tty.c:574) 
[ 945.846924][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 945.847140][ C3] n_tty_write (drivers/tty/n_tty.c:2380) 
[ 945.847304][ C3] ? __pfx_n_tty_write (drivers/tty/n_tty.c:2350) 
[ 945.847482][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 945.847639][ C3] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) 
[ 945.847819][ C3] ? iterate_tty_write (drivers/tty/tty_io.c:954 drivers/tty/tty_io.c:973) 
[ 945.847974][ C3] ? lock_acquire (kernel/locking/lockdep.c:5727) 
[ 945.848140][ C3] ? iterate_tty_write (drivers/tty/tty_io.c:954 drivers/tty/tty_io.c:973) 
[ 945.848305][ C3] iterate_tty_write (drivers/tty/tty_io.c:1021) 
[ 945.848473][ C3] ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244) 
[ 945.848641][ C3] file_tty_write.constprop.0 (drivers/tty/tty_io.c:1096) 
[ 945.848836][ C3] vfs_write (fs/read_write.c:497 fs/read_write.c:590) 
[ 945.848959][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 945.849182][ C3] ? __pfx_vfs_write (fs/read_write.c:571) 
[ 945.849338][ C3] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 945.849536][ C3] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 945.849690][ C3] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 945.849893][ C3] ksys_write (fs/read_write.c:643) 
[ 945.850012][ C3] ? __pfx_ksys_write (fs/read_write.c:633) 
[ 945.850205][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 945.850360][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  945.850576][    C3] RIP: 0033:0x7f23aebd6957
[ 945.850739][ 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
All code
========
   0:	0b 00                	or     (%rax),%eax
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b7                	jmp    0xffffffffffffffc7
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 01 00 00 00       	mov    $0x1,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[  945.851336][    C3] RSP: 002b:00007ffc1c00cf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  945.851596][    C3] RAX: ffffffffffffffda RBX: 000055f9b9c70310 RCX: 00007f23aebd6957
[  945.851837][    C3] RDX: 0000000000000001 RSI: 000055f9b9c70310 RDI: 0000000000000001
[  945.852086][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[  945.852321][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055f9b9c5c5c0


Finger prints:
__report_bad_irq:note_interrupt:handle_irq_event:handle_edge_irq:__common_interrupt