======================================
| 0
| xx__-> [   18.485195][  T230] ------------[ cut here ]------------
| [   18.485731][  T230] WARNING: CPU: 3 PID: 230 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)
| [   18.486284][  T230] Modules linked in:
[   18.487224][  T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.487627][  T230] 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)
[   18.487975][  T230] 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
[   18.489096][  T230] RSP: 0018:ffffc90000ab72e0 EFLAGS: 00010206
[   18.489482][  T230] RAX: 0000000000000007 RBX: 0000000000000005 RCX: ffffffff9b7f4955
[   18.489951][  T230] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800b7d0886
[   18.490415][  T230] RBP: ffff88800b7d0880 R08: ffff888009478118 R09: ffffed10016a7cb3
[   18.490887][  T230] R10: ffff88800b53e59f R11: ffffc90000ab6ff8 R12: ffff888009478118
[   18.491356][  T230] R13: ffff88800b53e400 R14: ffff88800b53e608 R15: ffff88800b53e400
[   18.491829][  T230] FS:  000000001e2443c0(0000) GS:ffff88809839a000(0000) knlGS:0000000000000000
[   18.492379][  T230] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   18.492774][  T230] CR2: 00007fb7a2706000 CR3: 000000000b6e6006 CR4: 0000000000772ef0
[   18.493269][  T230] PKRU: 55555554
[   18.493507][  T230] Call Trace:
[   18.494003][  T230]  <TASK>
[   18.494171][  T230]  ? dev_get_stats (net/core/dev.c:4143)
[   18.494499][  T230]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   18.494818][  T230]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   18.495134][  T230]  __dev_queue_xmit (net/core/dev.c:4786)
[   18.495473][  T230]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   18.495780][  T230]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.496100][  T230]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   18.496412][  T230]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   18.496728][  T230]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   18.497051][  T230]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   18.497367][  T230]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   18.497684][  T230]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   18.497997][  T230]  ? __ip_finish_output (net/ipv4/ip_output.c:258 net/ipv4/ip_output.c:310)
[   18.498306][  T230]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   18.498600][  T230]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   18.498921][  T230]  ? __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))
[   18.499238][  T230]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   18.499562][  T230]  ? get_page (./arch/x86/include/asm/atomic.h:53 ./include/linux/atomic/atomic-arch-fallback.h:992 ./include/linux/atomic/atomic-instrumented.h:436 ./include/linux/page_ref.h:153 ./include/linux/page_ref.h:160 ./include/linux/mm.h:1387 ./include/linux/mm.h:1397)
[   18.499800][  T230]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   18.500129][  T230]  tcp_write_xmit (net/ipv4/tcp_output.c:2999)
[   18.500450][  T230]  ? __alloc_skb (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 ./include/linux/refcount.h:134 net/core/skbuff.c:698)
[   18.500770][  T230]  ? tcp_retrans_try_collapse (net/ipv4/tcp_output.c:2903)
[   18.501079][  T230]  ? skb_do_copy_data_nocache (./include/net/sock.h:2281)
[   18.501392][  T230]  ? trace_tcp_ao_handshake_failure (./include/net/sock.h:2275)
[   18.501783][  T230]  __tcp_push_pending_frames (net/ipv4/tcp_output.c:3182)
[   18.502096][  T230]  tcp_sendmsg_locked (net/ipv4/tcp.c:1375)
[   18.502421][  T230]  ? tcp_sendmsg_fastopen (net/ipv4/tcp.c:1078)
[   18.502731][  T230]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.503055][  T230]  ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:455)
[   18.503365][  T230]  tcp_sendmsg (net/ipv4/tcp.c:1413)
[   18.503602][  T230]  sock_write_iter (net/socket.c:727 net/socket.c:742 net/socket.c:1195)
[   18.503912][  T230]  ? ____sys_recvmsg (net/socket.c:1176)
[   18.504237][  T230]  ? sk_setsockopt (net/core/sock.c:1161 net/core/sock.c:1674)
[   18.504555][  T230]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   18.504869][  T230]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[   18.505108][  T230]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   18.505431][  T230]  ? kernel_write (fs/read_write.c:667)
[   18.505749][  T230]  ? __fget_files (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 fs/file.c:1072)
[   18.506069][  T230]  ksys_write (fs/read_write.c:738)
[   18.506296][  T230]  ? fput (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:470 ./include/linux/file_ref.h:150 fs/file_table.c:544)
[   18.506522][  T230]  ? __ia32_sys_read (fs/read_write.c:728)
[   18.506842][  T230]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   18.507153][  T230]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   18.507528][  T230] RIP: 0033:0x49002f
[   18.507782][  T230] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 89 7a 04 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 dc 7a 04 00 48
All code
========
   0:	89 54 24 18          	mov    %edx,0x18(%rsp)
   4:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
   9:	89 7c 24 08          	mov    %edi,0x8(%rsp)
   d:	e8 89 7a 04 00       	call   0x47a9b
  12:	48 8b 54 24 18       	mov    0x18(%rsp),%rdx
  17:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
  1c:	41 89 c0             	mov    %eax,%r8d
  1f:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  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 31                	ja     0x63
  32:	44 89 c7             	mov    %r8d,%edi
  35:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  3a:	e8 dc 7a 04 00       	call   0x47b1b
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 31                	ja     0x39
   8:	44 89 c7             	mov    %r8d,%edi
   b:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  10:	e8 dc 7a 04 00       	call   0x47af1
  15:	48                   	rex.W
[   18.508884][  T230] RSP: 002b:00007ffc887a9850 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[   18.509347][  T230] RAX: ffffffffffffffda RBX: 00007ffc887a9e40 RCX: 000000000049002f
[   18.509811][  T230] RDX: 0000000000006590 RSI: 000000001e25a120 RDI: 000000000000000a
[   18.510269][  T230] RBP: 00007ffc887a98d0 R08: 0000000000000000 R09: 0000000000000668
[   18.510734][  T230] R10: 0000000000000040 R11: 0000000000000293 R12: 00007ffc887a9db8


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