======================================
| # 87.19 [+0.00] [   30.371243] ip (404) used greatest stack depth: 24528 bytes left
| # 87.19 [+0.00] [ 1894.074921] Mirror/redirect action on
| # 87.20 [+0.00] [ 1894.112505] tc (17724) used greatest stack depth: 24120 bytes left
| # 87.20 [+0.00] [ 2050.010822] irq 51: nobody cared (try booting with the "irqpoll" option)
# 87.20 [+0.00] [ 2050.011419] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
# 87.20 [+0.00] [ 2050.011422] Call Trace:
# 87.20 [+0.00] [ 2050.011424]  <IRQ>
# 87.20 [+0.00] [ 2050.011427] dump_stack_lvl (lib/dump_stack.c:123) 
# 87.20 [+0.00] [ 2050.011441] __report_bad_irq (kernel/irq/spurious.c:170) 
# 87.20 [+0.00] [ 2050.011451] note_interrupt (kernel/irq/spurious.c:372) 
# 87.21 [+0.00] [ 2050.011459] handle_irq_event (kernel/irq/handle.c:198 kernel/irq/handle.c:210) 
# 87.21 [+0.00] [ 2050.011467] handle_edge_irq (kernel/irq/chip.c:857) 
# 87.21 [+0.00] [ 2050.011477] __common_interrupt (./include/asm-generic/irq_regs.h:28 arch/x86/kernel/irq.c:295) 
# 87.21 [+0.00] [ 2050.011485] common_interrupt (arch/x86/kernel/irq.c:285 (discriminator 14)) 
# 87.21 [+0.00] [ 2050.011490]  </IRQ>
# 87.21 [+0.00] [ 2050.011491]  <TASK>
# 87.21 [+0.00] [ 2050.011495] asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) 
# 87.21 [+0.00] [ 2050.011500] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# 87.21 [+0.00] [ 2050.011508] Code: 74 24 10 e8 31 ea 03 fe 48 89 ef e8 59 39 04 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> 9a 6d f8 fd 65 8b 05 13 ac 0b 02 85 c0 74 0a 5b 5d c3 e8 d7 ee
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	31 ea                	xor    %ebp,%edx
   6:	03 fe                	add    %esi,%edi
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 59 39 04 fe       	call   0xfffffffffe043969
  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 9a 6d f8 fd       	call   0xfffffffffdf86dc9		<-- trapping instruction
  2f:	65 8b 05 13 ac 0b 02 	mov    %gs:0x20bac13(%rip),%eax        # 0x20bac49
  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:	d7                   	xlat   %ds:(%rbx)
  3f:	ee                   	out    %al,(%dx)

Code starting with the faulting instruction
===========================================
   0:	e8 9a 6d f8 fd       	call   0xfffffffffdf86d9f
   5:	65 8b 05 13 ac 0b 02 	mov    %gs:0x20bac13(%rip),%eax        # 0x20bac1f
   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:	d7                   	xlat   %ds:(%rbx)
  15:	ee                   	out    %al,(%dx)
# 87.22 [+0.00] [ 2050.011512] RSP: 0018:ffffc900013ffa98 EFLAGS: 00000206
# 87.22 [+0.00] [ 2050.011517] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000040
# 87.22 [+0.00] [ 2050.011519] RDX: 0000000000000000 RSI: ffffffffa83c56a3 RDI: 0000000000000001
# 87.22 [+0.00] [ 2050.011521] RBP: ffffffffaac48300 R08: 0000000000000001 R09: 0000000000000001
# 87.22 [+0.00] [ 2050.011522] R10: ffffffffa9211a17 R11: ffff888005e68970 R12: 00000000ffffffff
# 87.23 [+0.00] [ 2050.011525] R13: 0000000000000001 R14: ffffffffaac48408 R15: 00000000ffffffff
# 87.23 [+0.00] [ 2050.011541] 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:637) 
# 87.23 [+0.00] [ 2050.011553] process_output_block (drivers/tty/n_tty.c:561) 
# 87.23 [+0.00] [ 2050.011559] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# 87.23 [+0.00] [ 2050.011566] n_tty_write (drivers/tty/n_tty.c:2378) 
# 87.23 [+0.00] [ 2050.011569] ? _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:300 ./include/linux/iov_iter.h:328 lib/iov_iter.c:249 lib/iov_iter.c:260) 
# 87.23 [+0.00] [ 2050.011584] ? n_tty_receive_signal_char (drivers/tty/n_tty.c:2348) 
# 87.23 [+0.00] [ 2050.011589] ? __init_waitqueue_head (kernel/sched/wait.c:458) 
# 87.24 [+0.00] [ 2050.011597] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831) 
# 87.24 [+0.00] [ 2050.011600] ? iterate_tty_write (drivers/tty/tty_io.c:939 drivers/tty/tty_io.c:958) 
# 87.24 [+0.00] [ 2050.011612] iterate_tty_write (drivers/tty/tty_io.c:1007) 
# 87.24 [+0.00] [ 2050.011620] ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244) 
# 87.24 [+0.00] [ 2050.011627] file_tty_write.constprop.0 (drivers/tty/tty_io.c:1081) 
# 87.24 [+0.00] [ 2050.011635] vfs_write (fs/read_write.c:594 fs/read_write.c:686) 
# 87.24 [+0.00] [ 2050.011642] ? find_held_lock (kernel/locking/lockdep.c:5350) 
# 87.24 [+0.00] [ 2050.011647] ? kernel_write (fs/read_write.c:667) 
# 87.24 [+0.00] [ 2050.011653] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472) 
# 87.25 [+0.00] [ 2050.011666] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
# 87.25 [+0.00] [ 2050.011676] ksys_write (fs/read_write.c:738) 
# 87.25 [+0.00] [ 2050.011680] ? __ia32_sys_read (fs/read_write.c:728) 
# 87.25 [+0.00] [ 2050.011692] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
# 87.25 [+0.00] [ 2050.011696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# 87.25 [+0.00] [ 2050.011699] RIP: 0033:0x7f480d465337
# 87.25 [+0.00] [ 2050.011705] 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
# 87.26 [+0.01] [ 2050.011707] RSP: 002b:00007ffc13ede088 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
# 87.27 [+0.01] [ 2050.011710] RAX: ffffffffffffffda RBX: 000055afea0923f0 RCX: 00007f480d465337
# 87.28 [+0.00] [ 2050.011712] RDX: 0000000000000001 RSI: 000055afea0923f0 RDI: 0000000000000001
# 87.28 [+0.00] [ 2050.011713] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
# 87.28 [+0.00] [ 2050.011715] R10: 0000000000000001 R11: 0000000000000246 R12: 000055afea07d5e0
# 87.28 [+0.00] [ 2050.011717] R13: 000055afea05e2a0 R14: 0000000000000001 R15: 000055afea07d5e0
| make: Leaving directory '/home/virtme/testing-4/tools/testing/selftests'
| xx__-> echo $?
| 0
| xx__-> [ 2050.010822][    C0] irq 51: nobody cared (try booting with the "irqpoll" option)
[ 2050.011419][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 2050.011422][    C0] Call Trace:
[ 2050.011424][    C0]  <IRQ>
[ 2050.011427][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 2050.011441][ C0] __report_bad_irq (kernel/irq/spurious.c:170) 
[ 2050.011451][ C0] note_interrupt (kernel/irq/spurious.c:372) 
[ 2050.011459][ C0] handle_irq_event (kernel/irq/handle.c:198 kernel/irq/handle.c:210) 
[ 2050.011467][ C0] handle_edge_irq (kernel/irq/chip.c:857) 
[ 2050.011477][ C0] __common_interrupt (./include/asm-generic/irq_regs.h:28 arch/x86/kernel/irq.c:295) 
[ 2050.011485][ C0] common_interrupt (arch/x86/kernel/irq.c:285 (discriminator 14)) 
[ 2050.011490][    C0]  </IRQ>
[ 2050.011491][    C0]  <TASK>
[ 2050.011495][ C0] asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) 
[ 2050.011500][ C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 2050.011508][ C0] Code: 74 24 10 e8 31 ea 03 fe 48 89 ef e8 59 39 04 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> 9a 6d f8 fd 65 8b 05 13 ac 0b 02 85 c0 74 0a 5b 5d c3 e8 d7 ee
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	31 ea                	xor    %ebp,%edx
   6:	03 fe                	add    %esi,%edi
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 59 39 04 fe       	call   0xfffffffffe043969
  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 9a 6d f8 fd       	call   0xfffffffffdf86dc9		<-- trapping instruction
  2f:	65 8b 05 13 ac 0b 02 	mov    %gs:0x20bac13(%rip),%eax        # 0x20bac49
  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:	d7                   	xlat   %ds:(%rbx)
  3f:	ee                   	out    %al,(%dx)

Code starting with the faulting instruction
===========================================
   0:	e8 9a 6d f8 fd       	call   0xfffffffffdf86d9f
   5:	65 8b 05 13 ac 0b 02 	mov    %gs:0x20bac13(%rip),%eax        # 0x20bac1f
   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:	d7                   	xlat   %ds:(%rbx)
  15:	ee                   	out    %al,(%dx)
[ 2050.011512][    C0] RSP: 0018:ffffc900013ffa98 EFLAGS: 00000206
[ 2050.011517][    C0] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 0000000000000040
[ 2050.011519][    C0] RDX: 0000000000000000 RSI: ffffffffa83c56a3 RDI: 0000000000000001
[ 2050.011521][    C0] RBP: ffffffffaac48300 R08: 0000000000000001 R09: 0000000000000001
[ 2050.011522][    C0] R10: ffffffffa9211a17 R11: ffff888005e68970 R12: 00000000ffffffff
[ 2050.011525][    C0] R13: 0000000000000001 R14: ffffffffaac48408 R15: 00000000ffffffff
[ 2050.011541][ 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:637) 
[ 2050.011553][ C0] process_output_block (drivers/tty/n_tty.c:561) 
[ 2050.011559][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 2050.011566][ C0] n_tty_write (drivers/tty/n_tty.c:2378) 
[ 2050.011569][ 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:300 ./include/linux/iov_iter.h:328 lib/iov_iter.c:249 lib/iov_iter.c:260) 
[ 2050.011584][ C0] ? n_tty_receive_signal_char (drivers/tty/n_tty.c:2348) 
[ 2050.011589][ C0] ? __init_waitqueue_head (kernel/sched/wait.c:458) 
[ 2050.011597][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831) 
[ 2050.011600][ C0] ? iterate_tty_write (drivers/tty/tty_io.c:939 drivers/tty/tty_io.c:958) 
[ 2050.011612][ C0] iterate_tty_write (drivers/tty/tty_io.c:1007) 
[ 2050.011620][ C0] ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244) 
[ 2050.011627][ C0] file_tty_write.constprop.0 (drivers/tty/tty_io.c:1081) 
[ 2050.011635][ C0] vfs_write (fs/read_write.c:594 fs/read_write.c:686) 
[ 2050.011642][ C0] ? find_held_lock (kernel/locking/lockdep.c:5350) 
[ 2050.011647][ C0] ? kernel_write (fs/read_write.c:667) 
[ 2050.011653][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472) 
[ 2050.011666][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) 
[ 2050.011676][ C0] ksys_write (fs/read_write.c:738) 
[ 2050.011680][ C0] ? __ia32_sys_read (fs/read_write.c:728) 
[ 2050.011692][ C0] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 2050.011696][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 2050.011699][    C0] RIP: 0033:0x7f480d465337
[ 2050.011705][ 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
[ 2050.011707][    C0] RSP: 002b:00007ffc13ede088 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 2050.011710][    C0] RAX: ffffffffffffffda RBX: 000055afea0923f0 RCX: 00007f480d465337
[ 2050.011712][    C0] RDX: 0000000000000001 RSI: 000055afea0923f0 RDI: 0000000000000001
[ 2050.011713][    C0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 2050.011715][    C0] R10: 0000000000000001 R11: 0000000000000246 R12: 000055afea07d5e0


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