======================================
| # 108.93 [+0.00] [ 1035.299046] veth1: left promiscuous mode
| # 108.93 [+0.00] [ 1035.299346] br1: port 1(veth1) entered disabled state
| # 108.93 [+0.00] [ 1243.717198] ncat (5192) used greatest stack depth: 23376 bytes left
| # 108.93 [+0.00] [ 1265.711937] irq 4: nobody cared (try booting with the "irqpoll" option)
# 108.94 [+0.00] [ 1265.712578] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
# 108.94 [+0.00] [ 1265.712959] Call Trace:
# 108.94 [+0.00] [ 1265.713096]  <IRQ>
# 108.94 [+0.00] [ 1265.713189] dump_stack_lvl (lib/dump_stack.c:123) 
# 108.94 [+0.00] [ 1265.713377] __report_bad_irq (kernel/irq/spurious.c:214) 
# 108.94 [+0.00] [ 1265.713556] note_interrupt (kernel/irq/spurious.c:423) 
# 108.95 [+0.00] [ 1265.713733] handle_irq_event (kernel/irq/handle.c:198 kernel/irq/handle.c:210) 
# 108.95 [+0.00] [ 1265.713907] handle_edge_irq (kernel/irq/chip.c:833) 
# 108.95 [+0.00] [ 1265.714085] __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) 
# 108.95 [+0.00] [ 1265.714265] common_interrupt (arch/x86/kernel/irq.c:278 (discriminator 14)) 
# 108.95 [+0.00] [ 1265.714440]  </IRQ>
# 108.95 [+0.00] [ 1265.714530]  <TASK>
# 108.95 [+0.00] [ 1265.714619] asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) 
# 108.95 [+0.00] [ 1265.714798] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
# 108.96 [+0.00] [ 1265.715017] Code: 10 e8 01 e9 87 fd 48 89 ef e8 b9 59 88 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 15 cb 7b 5e <74> 0e 5b 5d c3 cc cc cc cc e8 7f 3e ad fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	01 e9                	add    %ebp,%ecx
   4:	87 fd                	xchg   %edi,%ebp
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 b9 59 88 fd       	call   0xfffffffffd8859c7
   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 15 cb 7b 5e 	decl   %gs:0x5e7bcb15(%rip)        # 0x5e7bcb3f
  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 7f 3e ad fd       	call   0xfffffffffdad3eb7
  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 7f 3e ad fd       	call   0xfffffffffdad3e8d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
# 108.96 [+0.01] [ 1265.715631] RSP: 0018:ffffc90000f3faa0 EFLAGS: 00000286
# 108.96 [+0.00] [ 1265.715847] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff497e10a
# 108.97 [+0.00] [ 1265.716099] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa187fe01
# 108.97 [+0.00] [ 1265.716363] RBP: ffffffffa54b43e0 R08: 0000000000000001 R09: fffffbfff49791d0
# 108.97 [+0.00] [ 1265.716880] R10: ffffffffa4bc8e87 R11: 0000000000000000 R12: 00000000ffffffff
# 108.97 [+0.00] [ 1265.717138] R13: 0000000000000001 R14: ffffffffa54b44e8 R15: 00000000ffffffff
# 108.97 [+0.00] [ 1265.717399] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
# 108.98 [+0.00] [ 1265.717618] uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:636) 
# 108.98 [+0.00] [ 1265.717758] process_output_block (drivers/tty/n_tty.c:574) 
# 108.98 [+0.00] [ 1265.717934] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4344 kernel/locking/lockdep.c:4403) 
# 108.98 [+0.00] [ 1265.718149] n_tty_write (drivers/tty/n_tty.c:2390) 
# 108.98 [+0.00] [ 1265.718324] ? __pfx_n_tty_write (drivers/tty/n_tty.c:2360) 
# 108.98 [+0.00] [ 1265.718496] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
# 108.98 [+0.00] [ 1265.718668] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) 
# 108.99 [+0.00] [ 1265.718841] ? iterate_tty_write (drivers/tty/tty_io.c:951 drivers/tty/tty_io.c:970) 
# 108.99 [+0.00] [ 1265.719009] ? lock_acquire (kernel/locking/lockdep.c:5795) 
# 108.99 [+0.00] [ 1265.719176] ? iterate_tty_write (drivers/tty/tty_io.c:951 drivers/tty/tty_io.c:970) 
# 108.99 [+0.00] [ 1265.719350] iterate_tty_write (drivers/tty/tty_io.c:1018) 
# 108.99 [+0.00] [ 1265.719526] ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244) 
# 108.99 [+0.00] [ 1265.719700] file_tty_write.constprop.0 (drivers/tty/tty_io.c:1093) 
# 108.99 [+0.00] [ 1265.719870] vfs_write (fs/read_write.c:590 fs/read_write.c:683) 
# 109.00 [+0.00] [ 1265.720004] ? __pfx___lock_release (kernel/locking/lockdep.c:5474) 
# 109.00 [+0.00] [ 1265.720172] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
# 109.00 [+0.00] [ 1265.720359] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
# 109.00 [+0.00] [ 1265.720534] ? lock_acquire (kernel/locking/lockdep.c:5795) 
# 109.00 [+0.00] [ 1265.720719] ? __pfx_vfs_write (fs/read_write.c:664) 
# 109.00 [+0.00] [ 1265.720894] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
# 109.00 [+0.00] [ 1265.721068] ? __rseq_handle_notify_resume (kernel/rseq.c:316) 
# 109.01 [+0.00] [ 1265.721283] ksys_write (fs/read_write.c:736) 
# 109.01 [+0.00] [ 1265.721411] ? __pfx_ksys_write (fs/read_write.c:726) 
# 109.01 [+0.00] [ 1265.721584] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
# 109.01 [+0.00] [ 1265.721759] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
# 109.01 [+0.00] [ 1265.721974] RIP: 0033:0x7fb554873957
# 109.01 [+0.00] [ 1265.722159] 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
# 109.02 [+0.01] [ 1265.722763] RSP: 002b:00007ffe28d4c268 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
# 109.02 [+0.00] [ 1265.723031] RAX: ffffffffffffffda RBX: 000055bded9503f0 RCX: 00007fb554873957
# 109.02 [+0.00] [ 1265.723286] RDX: 0000000000000001 RSI: 000055bded9503f0 RDI: 0000000000000001
# 109.02 [+0.00] [ 1265.723533] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
# 109.03 [+0.00] [ 1265.723782] R10: 0000000000000001 R11: 0000000000000246 R12: 000055bded93b5e0
# 109.03 [+0.00] [ 1265.724034] R13: 000055bded91c2a0 R14: 0000000000000001 R15: 000055bded93b5e0
| xx__-> echo $?
| 0
| xx__-> [ 1243.717198][ T5192] ncat (5192) used greatest stack depth: 23376 bytes left
| [ 1265.711937][    C3] irq 4: nobody cared (try booting with the "irqpoll" option)
[ 1265.712578][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1265.712959][    C3] Call Trace:
[ 1265.713096][    C3]  <IRQ>
[ 1265.713189][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 1265.713377][ C3] __report_bad_irq (kernel/irq/spurious.c:214) 
[ 1265.713556][ C3] note_interrupt (kernel/irq/spurious.c:423) 
[ 1265.713733][ C3] handle_irq_event (kernel/irq/handle.c:198 kernel/irq/handle.c:210) 
[ 1265.713907][ C3] handle_edge_irq (kernel/irq/chip.c:833) 
[ 1265.714085][ 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) 
[ 1265.714265][ C3] common_interrupt (arch/x86/kernel/irq.c:278 (discriminator 14)) 
[ 1265.714440][    C3]  </IRQ>
[ 1265.714530][    C3]  <TASK>
[ 1265.714619][ C3] asm_common_interrupt (./arch/x86/include/asm/idtentry.h:693) 
[ 1265.714798][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 1265.715017][ C3] Code: 10 e8 01 e9 87 fd 48 89 ef e8 b9 59 88 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 15 cb 7b 5e <74> 0e 5b 5d c3 cc cc cc cc e8 7f 3e ad fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	01 e9                	add    %ebp,%ecx
   4:	87 fd                	xchg   %edi,%ebp
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 b9 59 88 fd       	call   0xfffffffffd8859c7
   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 15 cb 7b 5e 	decl   %gs:0x5e7bcb15(%rip)        # 0x5e7bcb3f
  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 7f 3e ad fd       	call   0xfffffffffdad3eb7
  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 7f 3e ad fd       	call   0xfffffffffdad3e8d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[ 1265.715631][    C3] RSP: 0018:ffffc90000f3faa0 EFLAGS: 00000286
[ 1265.715847][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff497e10a
[ 1265.716099][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa187fe01
[ 1265.716363][    C3] RBP: ffffffffa54b43e0 R08: 0000000000000001 R09: fffffbfff49791d0
[ 1265.716880][    C3] R10: ffffffffa4bc8e87 R11: 0000000000000000 R12: 00000000ffffffff
[ 1265.717138][    C3] R13: 0000000000000001 R14: ffffffffa54b44e8 R15: 00000000ffffffff
[ 1265.717399][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 1265.717618][ C3] uart_write (drivers/tty/serial/serial_core.c:74 drivers/tty/serial/serial_core.c:636) 
[ 1265.717758][ C3] process_output_block (drivers/tty/n_tty.c:574) 
[ 1265.717934][ C3] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4344 kernel/locking/lockdep.c:4403) 
[ 1265.718149][ C3] n_tty_write (drivers/tty/n_tty.c:2390) 
[ 1265.718324][ C3] ? __pfx_n_tty_write (drivers/tty/n_tty.c:2360) 
[ 1265.718496][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 1265.718668][ C3] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) 
[ 1265.718841][ C3] ? iterate_tty_write (drivers/tty/tty_io.c:951 drivers/tty/tty_io.c:970) 
[ 1265.719009][ C3] ? lock_acquire (kernel/locking/lockdep.c:5795) 
[ 1265.719176][ C3] ? iterate_tty_write (drivers/tty/tty_io.c:951 drivers/tty/tty_io.c:970) 
[ 1265.719350][ C3] iterate_tty_write (drivers/tty/tty_io.c:1018) 
[ 1265.719526][ C3] ? tty_ldisc_ref_wait (drivers/tty/tty_ldisc.c:244) 
[ 1265.719700][ C3] file_tty_write.constprop.0 (drivers/tty/tty_io.c:1093) 
[ 1265.719870][ C3] vfs_write (fs/read_write.c:590 fs/read_write.c:683) 
[ 1265.720004][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5474) 
[ 1265.720172][ C3] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 1265.720359][ C3] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 1265.720534][ C3] ? lock_acquire (kernel/locking/lockdep.c:5795) 
[ 1265.720719][ C3] ? __pfx_vfs_write (fs/read_write.c:664) 
[ 1265.720894][ C3] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) 
[ 1265.721068][ C3] ? __rseq_handle_notify_resume (kernel/rseq.c:316) 
[ 1265.721283][ C3] ksys_write (fs/read_write.c:736) 
[ 1265.721411][ C3] ? __pfx_ksys_write (fs/read_write.c:726) 
[ 1265.721584][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 1265.721759][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1265.721974][    C3] RIP: 0033:0x7fb554873957
[ 1265.722159][ 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
[ 1265.722763][    C3] RSP: 002b:00007ffe28d4c268 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1265.723031][    C3] RAX: ffffffffffffffda RBX: 000055bded9503f0 RCX: 00007fb554873957
[ 1265.723286][    C3] RDX: 0000000000000001 RSI: 000055bded9503f0 RDI: 0000000000000001
[ 1265.723533][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000002000
[ 1265.723782][    C3] R10: 0000000000000001 R11: 0000000000000246 R12: 000055bded93b5e0


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