======================================
| # 81.60 [+0.00] [  820.688602] vx1: left promiscuous mode
| # 81.60 [+0.00] [  820.689424] br1: port 1(vx1) entered disabled state
| # 81.60 [+0.00] [ 1037.749939] Mirror/redirect action on
| # 81.60 [+0.00] [ 1073.149739] irq 51: nobody cared (try booting with the "irqpoll" option)
# 81.61 [+0.00] [ 1073.150393] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# 81.61 [+0.00] [ 1073.150396] Call Trace:
# 81.61 [+0.00] [ 1073.150399]  <IRQ>
# 81.61 [+0.00] [ 1073.150402]  dump_stack_lvl (lib/dump_stack.c:123)
# 81.61 [+0.00] [ 1073.150416]  __report_bad_irq (kernel/irq/spurious.c:170)
# 81.61 [+0.00] [ 1073.150425]  note_interrupt (kernel/irq/spurious.c:372)
# 81.61 [+0.00] [ 1073.150432]  handle_irq_event (kernel/irq/handle.c:245 kernel/irq/handle.c:257)
# 81.61 [+0.00] [ 1073.150440]  handle_edge_irq (kernel/irq/chip.c:857)
# 81.61 [+0.00] [ 1073.150450]  __common_interrupt (./include/asm-generic/irq_regs.h:28 arch/x86/kernel/irq.c:328)
# 81.61 [+0.00] [ 1073.150459]  common_interrupt (arch/x86/kernel/irq.c:318 (discriminator 14))
# 81.62 [+0.00] [ 1073.150464]  </IRQ>
# 81.62 [+0.00] [ 1073.150465]  <TASK>
# 81.62 [+0.00] [ 1073.150469]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
# 81.62 [+0.00] [ 1073.150474] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
# 81.62 [+0.00] [ 1073.150482] Code: 74 24 10 e8 31 bc ff fd 48 89 ef e8 59 0b 00 fe 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 41 f4 fd 65 8b 05 b3 0b 08 02 85 c0 74 0a 5b 5d c3 e8 c7 cf
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	31 bc ff fd 48 89 ef 	xor    %edi,-0x1076b703(%rdi,%rdi,8)
   b:	e8 59 0b 00 fe       	call   0xfffffffffe000b69
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 25                	jne    0x3d
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 2d                	jne    0x4c
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 41 f4 fd       	call   0xfffffffffdf44229		<-- trapping instruction
  2f:	65 8b 05 b3 0b 08 02 	mov    %gs:0x2080bb3(%rip),%eax        # 0x2080be9
  36:	85 c0                	test   %eax,%eax
  38:	74 0a                	je     0x44
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	e8                   	.byte 0xe8
  3e:	c7                   	(bad)
  3f:	cf                   	iret

Code starting with the faulting instruction
===========================================
   0:	e8 fa 41 f4 fd       	call   0xfffffffffdf441ff
   5:	65 8b 05 b3 0b 08 02 	mov    %gs:0x2080bb3(%rip),%eax        # 0x2080bbf
   c:	85 c0                	test   %eax,%eax
   e:	74 0a                	je     0x1a
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	e8                   	.byte 0xe8
  14:	c7                   	(bad)
  15:	cf                   	iret
# 81.62 [+0.00] [ 1073.150485] RSP: 0018:ffffc9000a0b7a88 EFLAGS: 00000206
# 81.62 [+0.00] [ 1073.150489] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
# 81.63 [+0.00] [ 1073.150491] RDX: 0000000000000000 RSI: ffffffff89785bc4 RDI: 0000000000000001
# 81.63 [+0.00] [ 1073.150493] RBP: ffffffff8c06c520 R08: 0000000000000001 R09: 0000000000000001
# 81.63 [+0.00] [ 1073.150495] R10: ffffffff8a622f57 R11: ffff888005fa0970 R12: 00000000ffffffff
# 81.63 [+0.00] [ 1073.150497] R13: 0000000000000001 R14: ffffffff8c06c628 R15: 00000000ffffffff
# 81.63 [+0.00] [ 1073.150513]  uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:92 drivers/tty/serial/serial_core.c:88 drivers/tty/serial/serial_core.c:634)
# 81.63 [+0.00] [ 1073.150526]  process_output_block (drivers/tty/n_tty.c:561)
# 81.64 [+0.00] [ 1073.150534]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194)
# 81.64 [+0.00] [ 1073.150541]  n_tty_write (drivers/tty/n_tty.c:2378)
# 81.64 [+0.00] [ 1073.150544]  ? _copy_from_iter (./arch/x86/include/asm/uaccess_64.h:126 ./arch/x86/include/asm/uaccess_64.h:141 lib/iov_iter.c:55 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:249 lib/iov_iter.c:260)
# 81.64 [+0.00] [ 1073.150556]  ? n_tty_receive_signal_char (drivers/tty/n_tty.c:2348)
# 81.64 [+0.00] [ 1073.150562]  ? __init_waitqueue_head (kernel/sched/wait.c:458)
# 81.64 [+0.00] [ 1073.150569]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
# 81.64 [+0.00] [ 1073.150575]  ? iterate_tty_write (drivers/tty/tty_io.c:939 drivers/tty/tty_io.c:958)
# 81.64 [+0.00] [ 1073.150585]  iterate_tty_write (drivers/tty/tty_io.c:1007)
# 81.64 [+0.00] [ 1073.150591]  ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244)
# 81.65 [+0.00] [ 1073.150598]  file_tty_write.constprop.0 (drivers/tty/tty_io.c:1081)
# 81.65 [+0.00] [ 1073.150605]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
# 81.65 [+0.00] [ 1073.150613]  ? find_held_lock (kernel/locking/lockdep.c:5350)
# 81.65 [+0.00] [ 1073.150618]  ? kernel_write (fs/read_write.c:667)
# 81.65 [+0.00] [ 1073.150626]  ? clockevents_program_event (kernel/time/clockevents.c:326)
# 81.65 [+0.00] [ 1073.150640]  ? clockevents_program_event (kernel/time/clockevents.c:336 (discriminator 3))
# 81.65 [+0.00] [ 1073.150648]  ksys_write (fs/read_write.c:738)
# 81.65 [+0.00] [ 1073.150653]  ? __ia32_sys_read (fs/read_write.c:728)
# 81.65 [+0.00] [ 1073.150657]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
# 81.65 [+0.00] [ 1073.150668]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
# 81.66 [+0.00] [ 1073.150677]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
# 81.66 [+0.00] [ 1073.150679] RIP: 0033:0x7f5afa71c257
# 81.66 [+0.00] [ 1073.150684] Code: 0f 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:	0f 00                	(bad)
   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
# 81.66 [+0.00] [ 1073.150687] RSP: 002b:00007fffd3a80a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
# 81.67 [+0.00] [ 1073.150690] RAX: ffffffffffffffda RBX: 0000558b5d47b420 RCX: 00007f5afa71c257
# 81.67 [+0.01] [ 1073.150692] RDX: 0000000000000001 RSI: 0000558b5d47b420 RDI: 0000000000000001
# 81.67 [+0.00] [ 1073.150693] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
# 81.68 [+0.00] [ 1073.150695] R10: 0000000000000001 R11: 0000000000000246 R12: 0000558b5d466600
# 81.68 [+0.00] [ 1073.150696] R13: 0000558b5d4472a0 R14: 0000000000000001 R15: 0000558b5d466600
| xx__-> echo $?
| 0
| xx__-> [ 1037.749939][ T7719] Mirror/redirect action on
| [ 1073.149739][    C0] irq 51: nobody cared (try booting with the "irqpoll" option)
[ 1073.150393][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1073.150396][    C0] Call Trace:
[ 1073.150399][    C0]  <IRQ>
[ 1073.150402][    C0]  dump_stack_lvl (lib/dump_stack.c:123)
[ 1073.150416][    C0]  __report_bad_irq (kernel/irq/spurious.c:170)
[ 1073.150425][    C0]  note_interrupt (kernel/irq/spurious.c:372)
[ 1073.150432][    C0]  handle_irq_event (kernel/irq/handle.c:245 kernel/irq/handle.c:257)
[ 1073.150440][    C0]  handle_edge_irq (kernel/irq/chip.c:857)
[ 1073.150450][    C0]  __common_interrupt (./include/asm-generic/irq_regs.h:28 arch/x86/kernel/irq.c:328)
[ 1073.150459][    C0]  common_interrupt (arch/x86/kernel/irq.c:318 (discriminator 14))
[ 1073.150464][    C0]  </IRQ>
[ 1073.150465][    C0]  <TASK>
[ 1073.150469][    C0]  asm_common_interrupt (./arch/x86/include/asm/idtentry.h:688)
[ 1073.150474][    C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
[ 1073.150482][    C0] Code: 74 24 10 e8 31 bc ff fd 48 89 ef e8 59 0b 00 fe 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 41 f4 fd 65 8b 05 b3 0b 08 02 85 c0 74 0a 5b 5d c3 e8 c7 cf
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	31 bc ff fd 48 89 ef 	xor    %edi,-0x1076b703(%rdi,%rdi,8)
   b:	e8 59 0b 00 fe       	call   0xfffffffffe000b69
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 25                	jne    0x3d
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 2d                	jne    0x4c
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 41 f4 fd       	call   0xfffffffffdf44229		<-- trapping instruction
  2f:	65 8b 05 b3 0b 08 02 	mov    %gs:0x2080bb3(%rip),%eax        # 0x2080be9
  36:	85 c0                	test   %eax,%eax
  38:	74 0a                	je     0x44
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	e8                   	.byte 0xe8
  3e:	c7                   	(bad)
  3f:	cf                   	iret

Code starting with the faulting instruction
===========================================
   0:	e8 fa 41 f4 fd       	call   0xfffffffffdf441ff
   5:	65 8b 05 b3 0b 08 02 	mov    %gs:0x2080bb3(%rip),%eax        # 0x2080bbf
   c:	85 c0                	test   %eax,%eax
   e:	74 0a                	je     0x1a
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	e8                   	.byte 0xe8
  14:	c7                   	(bad)
  15:	cf                   	iret
[ 1073.150485][    C0] RSP: 0018:ffffc9000a0b7a88 EFLAGS: 00000206
[ 1073.150489][    C0] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 0000000000000040
[ 1073.150491][    C0] RDX: 0000000000000000 RSI: ffffffff89785bc4 RDI: 0000000000000001
[ 1073.150493][    C0] RBP: ffffffff8c06c520 R08: 0000000000000001 R09: 0000000000000001
[ 1073.150495][    C0] R10: ffffffff8a622f57 R11: ffff888005fa0970 R12: 00000000ffffffff
[ 1073.150497][    C0] R13: 0000000000000001 R14: ffffffff8c06c628 R15: 00000000ffffffff
[ 1073.150513][    C0]  uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:92 drivers/tty/serial/serial_core.c:88 drivers/tty/serial/serial_core.c:634)
[ 1073.150526][    C0]  process_output_block (drivers/tty/n_tty.c:561)
[ 1073.150534][    C0]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194)
[ 1073.150541][    C0]  n_tty_write (drivers/tty/n_tty.c:2378)
[ 1073.150544][    C0]  ? _copy_from_iter (./arch/x86/include/asm/uaccess_64.h:126 ./arch/x86/include/asm/uaccess_64.h:141 lib/iov_iter.c:55 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:249 lib/iov_iter.c:260)
[ 1073.150556][    C0]  ? n_tty_receive_signal_char (drivers/tty/n_tty.c:2348)
[ 1073.150562][    C0]  ? __init_waitqueue_head (kernel/sched/wait.c:458)
[ 1073.150569][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[ 1073.150575][    C0]  ? iterate_tty_write (drivers/tty/tty_io.c:939 drivers/tty/tty_io.c:958)
[ 1073.150585][    C0]  iterate_tty_write (drivers/tty/tty_io.c:1007)
[ 1073.150591][    C0]  ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244)
[ 1073.150598][    C0]  file_tty_write.constprop.0 (drivers/tty/tty_io.c:1081)
[ 1073.150605][    C0]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[ 1073.150613][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1073.150618][    C0]  ? kernel_write (fs/read_write.c:667)
[ 1073.150626][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:326)
[ 1073.150640][    C0]  ? clockevents_program_event (kernel/time/clockevents.c:336 (discriminator 3))
[ 1073.150648][    C0]  ksys_write (fs/read_write.c:738)
[ 1073.150653][    C0]  ? __ia32_sys_read (fs/read_write.c:728)
[ 1073.150657][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[ 1073.150668][    C0]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 1073.150677][    C0]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 1073.150679][    C0] RIP: 0033:0x7f5afa71c257
[ 1073.150684][    C0] Code: 0f 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:	0f 00                	(bad)
   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
[ 1073.150687][    C0] RSP: 002b:00007fffd3a80a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1073.150690][    C0] RAX: ffffffffffffffda RBX: 0000558b5d47b420 RCX: 00007f5afa71c257
[ 1073.150692][    C0] RDX: 0000000000000001 RSI: 0000558b5d47b420 RDI: 0000000000000001
[ 1073.150693][    C0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1073.150695][    C0] R10: 0000000000000001 R11: 0000000000000246 R12: 0000558b5d466600


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