======================================
| 0
| xx__-> [   14.411886][    C2] ------------[ cut here ]------------
| [   14.412480][    C2] WARNING: CPU: 2 PID: 0 at ./include/net/sch_generic.h:843 __dev_xmit_skb (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:901 net/core/dev.c:4239)
| [   14.413088][    C2] Modules linked in:
[   14.414026][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.414466][    C2] RIP: 0010:__dev_xmit_skb (./include/net/sch_generic.h:843 ./include/net/sch_generic.h:889 ./include/net/sch_generic.h:901 net/core/dev.c:4239)
[   14.414834][    C2] Code: 7d 06 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 86 0d 00 00 66 83 7d 06 00 74 04 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 28 48 89 fa 48
All code
========
   0:	7d 06                	jge    0x8
   2:	48 89 fa             	mov    %rdi,%rdx
   5:	48 c1 ea 03          	shr    $0x3,%rdx
   9:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   d:	48 89 f8             	mov    %rdi,%rax
  10:	83 e0 07             	and    $0x7,%eax
  13:	83 c0 01             	add    $0x1,%eax
  16:	38 d0                	cmp    %dl,%al
  18:	7c 08                	jl     0x22
  1a:	84 d2                	test   %dl,%dl
  1c:	0f 85 86 0d 00 00    	jne    0xda8
  22:	66 83 7d 06 00       	cmpw   $0x0,0x6(%rbp)
  27:	74 04                	je     0x2d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  34:	fc ff df 
  37:	49 8d 7c 24 28       	lea    0x28(%r12),%rdi
  3c:	48 89 fa             	mov    %rdi,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   a:	fc ff df 
   d:	49 8d 7c 24 28       	lea    0x28(%r12),%rdi
  12:	48 89 fa             	mov    %rdi,%rdx
  15:	48                   	rex.W
[   14.416037][    C2] RSP: 0018:ffffc90000218720 EFLAGS: 00010202
[   14.416478][    C2] RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff8f3f4955
[   14.417000][    C2] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800af7b606
[   14.417518][    C2] RBP: ffff88800af7b600 R08: ffff88800a97f840 R09: ffffed10013b8833
[   14.418049][    C2] R10: ffff888009dc419f R11: 0000000000000040 R12: ffff88800a97f840
[   14.418578][    C2] R13: ffff888009dc4000 R14: ffff888009dc4208 R15: ffff888009dc4000
[   14.419104][    C2] FS:  0000000000000000(0000) GS:ffff8880a471a000(0000) knlGS:0000000000000000
[   14.419704][    C2] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.420263][    C2] CR2: 00007f70f89b4000 CR3: 0000000012b35003 CR4: 0000000000772ef0
[   14.420796][    C2] PKRU: 55555554
[   14.421064][    C2] Call Trace:
[   14.421336][    C2]  <IRQ>
[   14.421533][    C2]  ? dev_get_stats (net/core/dev.c:4143)
[   14.421903][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   14.422254][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   14.422612][    C2]  __dev_queue_xmit (net/core/dev.c:4786)
[   14.422985][    C2]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   14.423331][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   14.423687][    C2]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   14.424033][    C2]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   14.424379][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.424736][    C2]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   14.425092][    C2]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   14.425441][    C2]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   14.425800][    C2]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   14.426147][    C2]  ? ip_skb_dst_mtu (./include/net/ip.h:523)
[   14.426495][    C2]  ? __ip_finish_output (./include/linux/skbuff.h:1724 ./include/linux/skbuff.h:5149 net/ipv4/ip_output.c:309)
[   14.426857][    C2]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   14.427128][    C2]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   14.427479][    C2]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   14.427851][    C2]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   14.428207][    C2]  ? napi_skb_cache_get (net/core/skbuff.c:647)
[   14.428564][    C2]  ? __tcp_send_ack.part.0 (./include/linux/skbuff.h:1383 net/ipv4/tcp_output.c:4434)
[   14.428928][    C2]  tcp_delack_timer_handler (net/ipv4/tcp_timer.c:345 net/ipv4/tcp_timer.c:307)
[   14.429276][    C2]  ? tcp_delack_timer_handler (net/ipv4/tcp_timer.c:360)
[   14.429622][    C2]  tcp_delack_timer (net/ipv4/tcp_timer.c:375)
[   14.429978][    C2]  ? tcp_delack_timer_handler (net/ipv4/tcp_timer.c:360)
[   14.430323][    C2]  call_timer_fn (kernel/time/timer.c:1748)
[   14.430683][    C2]  ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1737)
[   14.431029][    C2]  ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1737)
[   14.431374][    C2]  ? trace_timer_expire_entry (kernel/time/timer.c:1724)
[   14.431727][    C2]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.432077][    C2]  ? __run_timers (kernel/time/timer.c:1798 kernel/time/timer.c:2372)
[   14.432422][    C2]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   14.432783][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   14.433135][    C2]  __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2372)
[   14.433480][    C2]  ? tcp_delack_timer_handler (net/ipv4/tcp_timer.c:360)
[   14.433842][    C2]  ? call_timer_fn (kernel/time/timer.c:2343)
[   14.434201][    C2]  ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[   14.434554][    C2]  ? spin_bug (kernel/locking/spinlock_debug.c:114)
[   14.434830][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   14.435173][    C2]  ? run_timer_softirq (kernel/time/timer.c:2384 kernel/time/timer.c:2393 kernel/time/timer.c:2401)
[   14.435526][    C2]  run_timer_softirq (kernel/time/timer.c:2385 kernel/time/timer.c:2393 kernel/time/timer.c:2401)
[   14.435883][    C2]  handle_softirqs (kernel/softirq.c:623)
[   14.436240][    C2]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
[   14.436586][    C2]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1052 arch/x86/kernel/apic/apic.c:1052)
[   14.436940][    C2]  </IRQ>
[   14.437131][    C2]  <TASK>
[   14.437321][    C2]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   14.437760][    C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82)
[   14.438131][    C2] Code: 48 8b 3d d4 2a 0c 02 e8 1f 00 00 00 48 2b 05 08 a5 8c 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d 33 cc 14 00 fb f4 <c3> 0f 1f 40 d6 41 54 55 53 48 89 fb 48 83 ec 10 8b 17 83 e2 fe 41
All code
========
   0:	48 8b 3d d4 2a 0c 02 	mov    0x20c2ad4(%rip),%rdi        # 0x20c2adb
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 08 a5 8c 00 	sub    0x8ca508(%rip),%rax        # 0x8ca51b
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d 33 cc 14 00 	verw   0x14cc33(%rip)        # 0x14cc5b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  2f:	41 54                	push   %r12
  31:	55                   	push   %rbp
  32:	53                   	push   %rbx
  33:	48 89 fb             	mov    %rdi,%rbx
  36:	48 83 ec 10          	sub    $0x10,%rsp
  3a:	8b 17                	mov    (%rdi),%edx
  3c:	83 e2 fe             	and    $0xfffffffe,%edx
  3f:	41                   	rex.B

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	0f 1f 40 d6          	nopl   -0x2a(%rax)
   5:	41 54                	push   %r12
   7:	55                   	push   %rbp
   8:	53                   	push   %rbx
   9:	48 89 fb             	mov    %rdi,%rbx
   c:	48 83 ec 10          	sub    $0x10,%rsp
  10:	8b 17                	mov    (%rdi),%edx
  12:	83 e2 fe             	and    $0xfffffffe,%edx
  15:	41                   	rex.B
[   14.439319][    C2] RSP: 0018:ffffc90000147dd8 EFLAGS: 00000206
[   14.439760][    C2] RAX: 000000000004699f RBX: 1ffff92000028fbf RCX: ffffffff8fb48225
[   14.440275][    C2] RDX: 0000000000000000 RSI: ffffffff903797ce RDI: ffffffff8fe5d640
[   14.440798][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c66252
[   14.441320][    C2] R10: ffff888036331293 R11: ffff888036336998 R12: 0000000000000000
[   14.441842][    C2] R13: ffff888001b3a300 R14: dffffc0000000000 R15: 0000000000000000
[   14.442359][    C2]  ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146)
[   14.442800][    C2]  default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:767)
[   14.443071][    C2]  default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:123)
[   14.443414][    C2]  cpuidle_idle_call (kernel/sched/idle.c:191)
[   14.443774][    C2]  ? arch_cpu_idle_exit+0x40/0x40
[   14.444122][    C2]  ? trace_irq_enable.constprop.0 (./arch/x86/include/asm/bitops.h:222 ./arch/x86/include/asm/bitops.h:233 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:646 ./include/linux/cpumask.h:1205 ./include/trace/events/preemptirq.h:40)
[   14.444550][    C2]  ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60)
[   14.444913][    C2]  do_idle (kernel/sched/idle.c:330)
[   14.445184][    C2]  cpu_startup_entry (kernel/sched/idle.c:427 (discriminator 1))
[   14.445529][    C2]  start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283)
[   14.445885][    C2]  ? set_cpu_sibling_map (arch/x86/kernel/smpboot.c:233)


Finger prints:
__dev_xmit_skb:__dev_queue_xmit:ip_finish_output2:ip_output:__ip_queue_xmit