======================================
| 0
| xx__-> [   14.732774][  T231] ------------[ cut here ]------------
| [   14.733274][  T231] WARNING: CPU: 0 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)
| [   14.733826][  T231] Modules linked in:
[   14.734760][  T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.735164][  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)
[   14.735486][  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
[   14.736615][  T231] RSP: 0018:ffffc900007674b0 EFLAGS: 00010202
[   14.737027][  T231] RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff8e1f4955
[   14.737512][  T231] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88800a57da06
[   14.737979][  T231] RBP: ffff88800a57da00 R08: ffff88800a648118 R09: ffffed1001424cb3
[   14.738458][  T231] R10: ffff88800a12659f R11: ffffc900007671c8 R12: ffff88800a648118
[   14.738922][  T231] R13: ffff88800a126400 R14: ffff88800a126608 R15: ffff88800a126400
[   14.739402][  T231] FS:  000000002cfd03c0(0000) GS:ffff8880a581a000(0000) knlGS:0000000000000000
[   14.740067][  T231] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   14.740460][  T231] CR2: 00007fcbb3af5000 CR3: 00000000050f4004 CR4: 0000000000772ef0
[   14.740929][  T231] PKRU: 55555554
[   14.741180][  T231] Call Trace:
[   14.741416][  T231]  <TASK>
[   14.741584][  T231]  ? dev_get_stats (net/core/dev.c:4143)
[   14.741905][  T231]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   14.742236][  T231]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   14.742688][  T231]  __dev_queue_xmit (net/core/dev.c:4786)
[   14.743024][  T231]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   14.743330][  T231]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   14.743649][  T231]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   14.743961][  T231]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.744280][  T231]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   14.744598][  T231]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   14.744910][  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)
[   14.745232][  T231]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   14.745541][  T231]  ? ip_skb_dst_mtu (./include/net/ip.h:523)
[   14.745851][  T231]  ? __ip_finish_output (./include/linux/skbuff.h:1724 ./include/linux/skbuff.h:5149 net/ipv4/ip_output.c:309)
[   14.746176][  T231]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   14.746413][  T231]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   14.746722][  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))
[   14.747044][  T231]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   14.747380][  T231]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   14.747689][  T231]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   14.748001][  T231]  ? ktime_get (./include/linux/seqlock.h:74 kernel/time/timekeeping.c:824)
[   14.748332][  T231]  tcp_write_xmit (net/ipv4/tcp_output.c:2999)
[   14.748651][  T231]  ? tcp_connect_init (net/ipv4/tcp_output.c:2018)
[   14.748962][  T231]  ? tcp_retrans_try_collapse (net/ipv4/tcp_output.c:2903)
[   14.749282][  T231]  ? 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)
[   14.749592][  T231]  ? __free_zapped_classes (kernel/locking/lockdep.c:6345 (discriminator 3))
[   14.749912][  T231]  __tcp_push_pending_frames (net/ipv4/tcp_output.c:3182)
[   14.750236][  T231]  do_tcp_setsockopt (net/ipv4/tcp.c:3577 net/ipv4/tcp.c:4028)
[   14.750543][  T231]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.750852][  T231]  ? tcp_sock_set_maxseg (net/ipv4/tcp.c:3826)
[   14.751171][  T231]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.751485][  T231]  ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.751797][  T231]  ? validate_chain (kernel/locking/lockdep.c:3801 kernel/locking/lockdep.c:3821 kernel/locking/lockdep.c:3876)
[   14.752122][  T231]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   14.752445][  T231]  do_sock_setsockopt (net/socket.c:2360)
[   14.752761][  T231]  ? move_addr_to_user (net/socket.c:2329)
[   14.753086][  T231]  ? __fget_files (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 fs/file.c:1072)
[   14.753403][  T231]  ? __fget_files (fs/file.c:1075)
[   14.753722][  T231]  __sys_setsockopt (./include/linux/file.h:62 ./include/linux/file.h:83 net/socket.c:2377)
[   14.754046][  T231]  __x64_sys_setsockopt (net/socket.c:2388)
[   14.754356][  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)
[   14.754665][  T231]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   14.754972][  T231]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   14.755300][  T231]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   14.755687][  T231] RIP: 0033:0x492bbe
[   14.755933][  T231] Code: 0f 1f 40 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 00 f3 0f 1e fa 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 c7 c2 b0
All code
========
   0:	0f 1f 40 00          	nopl   0x0(%rax)
   4:	48 c7 c2 b0 ff ff ff 	mov    $0xffffffffffffffb0,%rdx
   b:	f7 d8                	neg    %eax
   d:	64 89 02             	mov    %eax,%fs:(%rdx)
  10:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
  17:	eb b1                	jmp    0xffffffffffffffca
  19:	0f 1f 00             	nopl   (%rax)
  1c:	f3 0f 1e fa          	endbr64
  20:	49 89 ca             	mov    %rcx,%r10
  23:	b8 36 00 00 00       	mov    $0x36,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 0a                	ja     0x3c
  32:	c3                   	ret
  33:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  3a:	00 00 
  3c:	48                   	rex.W
  3d:	c7                   	.byte 0xc7
  3e:	c2                   	.byte 0xc2
  3f:	b0                   	.byte 0xb0

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 0a                	ja     0x12
   8:	c3                   	ret
   9:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  10:	00 00 
  12:	48                   	rex.W
  13:	c7                   	.byte 0xc7
  14:	c2                   	.byte 0xc2
  15:	b0                   	.byte 0xb0
[   14.757055][  T231] RSP: 002b:00007fff7d151ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
[   14.757532][  T231] RAX: ffffffffffffffda RBX: 00007fff7d152490 RCX: 0000000000492bbe
[   14.757997][  T231] RDX: 0000000000000003 RSI: 0000000000000006 RDI: 000000000000000a
[   14.758469][  T231] RBP: 00007fff7d151f20 R08: 0000000000000004 R09: 000000000000f3c2
[   14.758933][  T231] R10: 00007fff7d151ef4 R11: 0000000000000246 R12: 00007fff7d152408


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