======================================
| 0
| xx__-> [   14.742980][  T231] ------------[ cut here ]------------
| [   14.743465][  T231] WARNING: CPU: 2 PID: 231 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)
| [   14.744051][  T231] Modules linked in:
[   14.745106][  T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.745507][  T231] 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)
[   14.745895][  T231] 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
[   14.747026][  T231] RSP: 0018:ffffc90000ad73e8 EFLAGS: 00010202
[   14.747451][  T231] RAX: 0000000000000007 RBX: 0000000000000004 RCX: ffffffffafdf4955
[   14.747943][  T231] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800906cc06
[   14.748428][  T231] RBP: ffff88800906cc00 R08: ffff88800c2a4118 R09: ffffed10004080b3
[   14.748936][  T231] R10: ffff88800204059f R11: ffffc90000ad7100 R12: ffff88800c2a4118
[   14.749416][  T231] R13: ffff888002040400 R14: ffff888002040608 R15: ffff888002040400
[   14.749896][  T231] FS:  000000002b5833c0(0000) GS:ffff888083d1a000(0000) knlGS:0000000000000000
[   14.750462][  T231] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.750871][  T231] CR2: 00007fecae423000 CR3: 000000000bf46001 CR4: 0000000000772ef0
[   14.751374][  T231] PKRU: 55555554
[   14.751633][  T231] Call Trace:
[   14.751891][  T231]  <TASK>
[   14.752085][  T231]  ? dev_get_stats (net/core/dev.c:4143)
[   14.752412][  T231]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   14.752748][  T231]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   14.753088][  T231]  __dev_queue_xmit (net/core/dev.c:4786)
[   14.753422][  T231]  ? irqentry_exit (kernel/entry/common.c:215)
[   14.753750][  T231]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.754102][  T231]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   14.754437][  T231]  ? ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   14.754766][  T231]  ? neigh_connected_output (./include/linux/seqlock.h:227 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   14.755116][  T231]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   14.755457][  T231]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   14.755782][  T231]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   14.756120][  T231]  ? __ip_finish_output (net/ipv4/ip_output.c:258 net/ipv4/ip_output.c:310)
[   14.756454][  T231]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   14.756708][  T231]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   14.757055][  T231]  ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1585 (discriminator 4))
[   14.757377][  T231]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   14.757717][  T231]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   14.758049][  T231]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   14.758388][  T231]  ? ktime_get (./include/linux/seqlock.h:74 kernel/time/timekeeping.c:824)
[   14.758727][  T231]  tcp_write_xmit (net/ipv4/tcp_output.c:2999)
[   14.759087][  T231]  ? zerocopy_fill_skb_from_iter (net/core/datagram.c:750)
[   14.759497][  T231]  ? tcp_retrans_try_collapse (net/ipv4/tcp_output.c:2903)
[   14.759837][  T231]  __tcp_push_pending_frames (net/ipv4/tcp_output.c:3182)
[   14.760171][  T231]  tcp_sendmsg_locked (net/ipv4/tcp.c:1375)
[   14.760507][  T231]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   14.760842][  T231]  ? tcp_sendmsg_fastopen (net/ipv4/tcp.c:1078)
[   14.761181][  T231]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   14.761518][  T231]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   14.761848][  T231]  tcp_sendmsg (net/ipv4/tcp.c:1413)
[   14.762109][  T231]  __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[   14.762437][  T231]  ? __ia32_sys_getpeername (net/socket.c:2211)
[   14.762762][  T231]  ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:939)
[   14.763116][  T231]  ? fput (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:470 ./include/linux/file_ref.h:150 fs/file_table.c:544)
[   14.763375][  T231]  ? do_epoll_ctl (./include/linux/file.h:63 ./include/linux/file.h:83 fs/eventpoll.c:2256)
[   14.763707][  T231]  ? __x64_sys_epoll_ctl (fs/eventpoll.c:2403 fs/eventpoll.c:2394 fs/eventpoll.c:2394)
[   14.764057][  T231]  ? fd_install (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:979 fs/file.c:676)
[   14.764388][  T231]  ? do_epoll_ctl (fs/eventpoll.c:2394)
[   14.764711][  T231]  __x64_sys_sendto (net/socket.c:2247)
[   14.765051][  T231]  ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:124 arch/x86/entry/syscall_64.c:90)
[   14.765380][  T231]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.765701][  T231]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   14.766042][  T231]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   14.766437][  T231] RIP: 0033:0x4929ee
[   14.766697][  T231] Code: 4c 24 1c e8 d4 50 04 00 44 8b 54 24 1c 8b 3c 24 45 31 c9 41 89 c4 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 32 44 89 e7 48 89 04 24 e8 1e 51 04 00 48 8b
All code
========
   0:	4c 24 1c             	rex.WR and $0x1c,%al
   3:	e8 d4 50 04 00       	call   0x450dc
   8:	44 8b 54 24 1c       	mov    0x1c(%rsp),%r10d
   d:	8b 3c 24             	mov    (%rsp),%edi
  10:	45 31 c9             	xor    %r9d,%r9d
  13:	41 89 c4             	mov    %eax,%r12d
  16:	48 8b 54 24 10       	mov    0x10(%rsp),%rdx
  1b:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  20:	45 31 c0             	xor    %r8d,%r8d
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 32                	ja     0x64
  32:	44 89 e7             	mov    %r12d,%edi
  35:	48 89 04 24          	mov    %rax,(%rsp)
  39:	e8 1e 51 04 00       	call   0x4515c
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 32                	ja     0x3a
   8:	44 89 e7             	mov    %r12d,%edi
   b:	48 89 04 24          	mov    %rax,(%rsp)
   f:	e8 1e 51 04 00       	call   0x45132
  14:	48                   	rex.W
  15:	8b                   	.byte 0x8b
[   14.767818][  T231] RSP: 002b:00007ffc49657b30 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[   14.768302][  T231] RAX: ffffffffffffffda RBX: 00007ffc49658120 RCX: 00000000004929ee
[   14.768799][  T231] RDX: 0000000000000fa0 RSI: 000000002b593ab0 RDI: 000000000000000a
[   14.769296][  T231] RBP: 00007ffc49657bb0 R08: 0000000000000000 R09: 0000000000000000
[   14.769778][  T231] R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000000000


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