======================================
| 0
| xx__-> [   17.632248][  T232] ------------[ cut here ]------------
| [   17.632927][  T232] WARNING: CPU: 2 PID: 232 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)
| [   17.633556][  T232] Modules linked in:
[   17.634565][  T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.634987][  T232] 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)
[   17.635358][  T232] 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
[   17.636547][  T232] RSP: 0018:ffffc90000b672e8 EFLAGS: 00010202
[   17.636972][  T232] RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff8a3f4955
[   17.637515][  T232] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888004f69306
[   17.638022][  T232] RBP: ffff888004f69300 R08: ffff888009b7c118 R09: ffffed1001422e33
[   17.638539][  T232] R10: ffff88800a11719f R11: ffffc90000b67000 R12: ffff888009b7c118
[   17.639035][  T232] R13: ffff88800a117000 R14: ffff88800a117208 R15: ffff88800a117000
[   17.639549][  T232] FS:  000000000f6173c0(0000) GS:ffff8880a971a000(0000) knlGS:0000000000000000
[   17.640113][  T232] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   17.640551][  T232] CR2: 00007ff59e3d8000 CR3: 000000000938b006 CR4: 0000000000772ef0
[   17.641047][  T232] PKRU: 55555554
[   17.641301][  T232] Call Trace:
[   17.641594][  T232]  <TASK>
[   17.641783][  T232]  ? dev_get_stats (net/core/dev.c:4143)
[   17.642134][  T232]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.642500][  T232]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   17.643034][  T232]  __dev_queue_xmit (net/core/dev.c:4786)
[   17.643406][  T232]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   17.643750][  T232]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.644093][  T232]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   17.644447][  T232]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   17.644800][  T232]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   17.645139][  T232]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   17.645505][  T232]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   17.645842][  T232]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   17.646170][  T232]  ? ip_skb_dst_mtu (./include/net/ip.h:523)
[   17.646533][  T232]  ? __ip_finish_output (./include/linux/skbuff.h:1724 ./include/linux/skbuff.h:5149 net/ipv4/ip_output.c:309)
[   17.646871][  T232]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   17.647130][  T232]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   17.647484][  T232]  ? __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))
[   17.647834][  T232]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   17.648194][  T232]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.648558][  T232]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   17.648900][  T232]  ? tcp_fastopen_no_cookie (./include/net/net_namespace.h:414 ./include/net/sock.h:695 net/ipv4/tcp_fastopen.c:342)
[   17.649297][  T232]  tcp_send_syn_data (net/ipv4/tcp_output.c:1646 net/ipv4/tcp_output.c:4245)
[   17.649699][  T232]  tcp_connect (net/ipv4/tcp_output.c:4336 (discriminator 2))
[   17.650053][  T232]  tcp_v4_connect (net/ipv4/tcp_ipv4.c:347)
[   17.650427][  T232]  ? tcp_v4_conn_request (net/ipv4/tcp_ipv4.c:225)
[   17.650763][  T232]  ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194)
[   17.651179][  T232]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   17.651545][  T232]  __inet_stream_connect (net/ipv4/af_inet.c:679)
[   17.651890][  T232]  ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:69 mm/kasan/common.c:78)
[   17.652227][  T232]  tcp_sendmsg_fastopen (net/ipv4/tcp.c:1069)
[   17.652596][  T232]  tcp_sendmsg_locked (net/ipv4/tcp.c:1143)
[   17.652926][  T232]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   17.653258][  T232]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   17.653624][  T232]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   17.653959][  T232]  ? tcp_sendmsg_fastopen (net/ipv4/tcp.c:1078)
[   17.654301][  T232]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   17.654668][  T232]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   17.655014][  T232]  tcp_sendmsg (net/ipv4/tcp.c:1413)
[   17.655272][  T232]  __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[   17.655629][  T232]  ? __ia32_sys_getpeername (net/socket.c:2211)
[   17.655963][  T232]  ? move_addr_to_user (net/socket.c:2329)
[   17.656301][  T232]  ? __fget_files (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 fs/file.c:1072)
[   17.656664][  T232]  ? __fget_files (fs/file.c:1075)
[   17.657006][  T232]  ? fput (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:470 ./include/linux/file_ref.h:150 fs/file_table.c:544)
[   17.657281][  T232]  ? __sys_setsockopt (./include/linux/file.h:63 ./include/linux/file.h:83 net/socket.c:2377)
[   17.657643][  T232]  __x64_sys_sendto (net/socket.c:2247)
[   17.657984][  T232]  ? 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)
[   17.658318][  T232]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   17.658681][  T232]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   17.659018][  T232]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   17.659444][  T232] RIP: 0033:0x492b56
[   17.659726][  T232] Code: 4f 04 00 44 8b 4c 24 2c 4c 8b 44 24 20 41 89 c4 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 3a 44 89 e7 48 89 44 24 08 e8 b5 4f 04 00 48
All code
========
   0:	4f 04 00             	rex.WRXB add $0x0,%al
   3:	44 8b 4c 24 2c       	mov    0x2c(%rsp),%r9d
   8:	4c 8b 44 24 20       	mov    0x20(%rsp),%r8
   d:	41 89 c4             	mov    %eax,%r12d
  10:	44 8b 54 24 28       	mov    0x28(%rsp),%r10d
  15:	48 8b 54 24 18       	mov    0x18(%rsp),%rdx
  1a:	b8 2c 00 00 00       	mov    $0x2c,%eax
  1f:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
  24:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 3a                	ja     0x6c
  32:	44 89 e7             	mov    %r12d,%edi
  35:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  3a:	e8 b5 4f 04 00       	call   0x44ff4
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 3a                	ja     0x42
   8:	44 89 e7             	mov    %r12d,%edi
   b:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  10:	e8 b5 4f 04 00       	call   0x44fca
  15:	48                   	rex.W
[   17.660879][  T232] RSP: 002b:00007fffaa299840 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
[   17.661377][  T232] RAX: ffffffffffffffda RBX: 00007fffaa299ed0 RCX: 0000000000492b56
[   17.661904][  T232] RDX: 00000000000001f4 RSI: 000000000f61f7f0 RDI: 0000000000000009
[   17.662434][  T232] RBP: 00007fffaa299960 R08: 00007fffaa2998b0 R09: 0000000000000010
[   17.662945][  T232] R10: 0000000024000000 R11: 0000000000000293 R12: 0000000000000000


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