======================================
| 0
| xx__-> [   28.395258][  T343] ------------[ cut here ]------------
| [   28.395825][  T343] WARNING: CPU: 0 PID: 343 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)
| [   28.396416][  T343] Modules linked in:
[   28.397420][  T343] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   28.397856][  T343] 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)
[   28.398208][  T343] 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
[   28.399447][  T343] RSP: 0018:ffffc90000ef6df0 EFLAGS: 00010202
[   28.399902][  T343] RAX: 0000000000000007 RBX: 0000000000000001 RCX: ffffffff9fdf4955
[   28.400416][  T343] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880093f8886
[   28.400936][  T343] RBP: ffff8880093f8880 R08: ffff888001fb4ac0 R09: ffffed1001c96533
[   28.401452][  T343] R10: ffff88800e4b299f R11: ffffc90000ef6b08 R12: ffff888001fb4ac0
[   28.401971][  T343] R13: ffff88800e4b2800 R14: ffff88800e4b2a08 R15: ffff88800e4b2800
[   28.402490][  T343] FS:  000000002bc793c0(0000) GS:ffff888093c1a000(0000) knlGS:0000000000000000
[   28.403089][  T343] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.403525][  T343] CR2: 0000000000000000 CR3: 000000000bebb001 CR4: 0000000000772ef0
[   28.404039][  T343] PKRU: 55555554
[   28.404297][  T343] Call Trace:
[   28.404563][  T343]  <TASK>
[   28.404861][  T343]  ? dev_get_stats (net/core/dev.c:4143)
[   28.405207][  T343]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.405561][  T343]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   28.405907][  T343]  __dev_queue_xmit (net/core/dev.c:4786)
[   28.406259][  T343]  ? netdev_core_pick_tx (net/core/dev.c:4728)
[   28.406605][  T343]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.406948][  T343]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   28.407288][  T343]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   28.407636][  T343]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   28.407979][  T343]  ? neigh_connected_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:836 net/core/neighbour.c:1617)
[   28.408326][  T343]  ip_finish_output2 (./include/net/neighbour.h:556 net/ipv4/ip_output.c:237)
[   28.408678][  T343]  ? ip_skb_dst_mtu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 ./include/net/ip.h:504 ./include/net/ip.h:518)
[   28.409026][  T343]  ? ip_fragment.constprop.0 (net/ipv4/ip_output.c:201)
[   28.409362][  T343]  ? ip_skb_dst_mtu (./include/net/ip.h:523)
[   28.409710][  T343]  ? __ip_finish_output (./include/linux/skbuff.h:1724 ./include/linux/skbuff.h:5149 net/ipv4/ip_output.c:309)
[   28.410052][  T343]  ip_output (./include/linux/netfilter.h:414 net/ipv4/ip_output.c:438)
[   28.410309][  T343]  __ip_queue_xmit (./include/net/dst.h:464 net/ipv4/ip_output.c:131 net/ipv4/ip_output.c:534)
[   28.410664][  T343]  __tcp_transmit_skb (net/ipv4/tcp_output.c:1628)
[   28.411020][  T343]  ? __tcp_select_window (net/ipv4/tcp_output.c:1449)
[   28.411360][  T343]  ? napi_skb_cache_get (net/core/skbuff.c:647)
[   28.411719][  T343]  ? __tcp_send_ack.part.0 (./include/linux/skbuff.h:1383 net/ipv4/tcp_output.c:4434)
[   28.412071][  T343]  ? __tcp_ack_snd_check (./include/net/net_namespace.h:414 ./include/net/sock.h:695 ./include/net/inet_connection_sock.h:330 net/ipv4/tcp_input.c:341 net/ipv4/tcp_input.c:5910)
[   28.412413][  T343]  tcp_rcv_established (net/ipv4/tcp_input.c:5976 net/ipv4/tcp_input.c:6467)
[   28.412765][  T343]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.413107][  T343]  ? tcp_check_space (net/ipv4/tcp_input.c:6276)
[   28.413445][  T343]  ? ipv4_dst_check (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/ipv4/route.c:402 net/ipv4/route.c:1217)
[   28.413799][  T343]  tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929)
[   28.414141][  T343]  tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2324)
[   28.414493][  T343]  ? raw_v4_input (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/ipv4/raw.c:196)
[   28.414838][  T343]  ? raw_v4_input (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 net/ipv4/raw.c:196)
[   28.415174][  T343]  ? tcp_filter (net/ipv4/tcp_ipv4.c:2153)
[   28.415427][  T343]  ? raw_v4_input (net/ipv4/raw.c:165)
[   28.415772][  T343]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.416116][  T343]  ? raw_rcv (net/ipv4/raw.c:165)
[   28.416374][  T343]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870)
[   28.416728][  T343]  ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207)
[   28.417069][  T343]  ip_local_deliver_finish.constprop.0 (./include/linux/rcupdate.h:895 net/ipv4/ip_input.c:242)
[   28.417500][  T343]  ? ip_local_deliver (net/ipv4/ip_input.c:566)
[   28.417839][  T343]  __netif_receive_skb_one_core (net/core/dev.c:6131)
[   28.418260][  T343]  ? __netif_receive_skb_list_core (net/core/dev.c:6131)
[   28.418688][  T343]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.419038][  T343]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   28.419372][  T343]  ? netif_receive_skb_internal (./include/linux/rcupdate.h:331 (discriminator 16) ./include/linux/rcupdate.h:867 (discriminator 16) net/core/dev.c:6324 (discriminator 16))
[   28.419804][  T343]  netif_receive_skb_internal (net/core/dev.c:6337)
[   28.420144][  T343]  ? __netif_receive_skb (net/core/dev.c:6316)
[   28.420488][  T343]  ? _copy_from_iter (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 lib/iov_iter.c:55 ./include/linux/iov_iter.h:52 ./include/linux/iov_iter.h:304 ./include/linux/iov_iter.h:330 lib/iov_iter.c:249 lib/iov_iter.c:260)
[   28.420832][  T343]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.421175][  T343]  netif_receive_skb (net/core/dev.c:6396)
[   28.421520][  T343]  tun_rx_batched.isra.0 (./include/linux/bottom_half.h:33 drivers/net/tun.c:1510)
[   28.421861][  T343]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.422200][  T343]  ? tun_setup (drivers/net/tun.c:1474)
[   28.422556][  T343]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.422893][  T343]  ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5831)
[   28.423228][  T343]  ? tun_get_user (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:867 drivers/net/tun.c:1894)
[   28.423579][  T343]  tun_get_user (drivers/net/tun.c:1953)
[   28.423932][  T343]  ? tun_build_skb (drivers/net/tun.c:1696)
[   28.424276][  T343]  ? ref_tracker_dir_print (lib/ref_tracker.c:256)
[   28.424631][  T343]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.424969][  T343]  ? tun_get (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 drivers/net/tun.c:793)
[   28.425223][  T343]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   28.425570][  T343]  ? tun_get (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 drivers/net/tun.c:793)
[   28.425829][  T343]  tun_chr_write_iter (drivers/net/tun.c:800 drivers/net/tun.c:2001)
[   28.426168][  T343]  do_iter_readv_writev (fs/read_write.c:828)
[   28.426522][  T343]  ? ksys_lseek (fs/read_write.c:814)
[   28.426870][  T343]  ? import_iovec (lib/iov_iter.c:1430)
[   28.427212][  T343]  vfs_writev (fs/read_write.c:1057)
[   28.427476][  T343]  ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751)
[   28.427817][  T343]  ? vfs_iocb_iter_write (fs/read_write.c:1030)
[   28.428153][  T343]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   28.428507][  T343]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   28.428851][  T343]  ? __lock_release (kernel/locking/lockdep.c:5536)
[   28.429189][  T343]  ? __fget_files (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:897 fs/file.c:1072)
[   28.429537][  T343]  ? __fget_files (fs/file.c:1075)
[   28.429878][  T343]  ? __rseq_handle_notify_resume (kernel/rseq.c:442)
[   28.430301][  T343]  ? do_writev (fs/read_write.c:1103)
[   28.430565][  T343]  do_writev (fs/read_write.c:1103)
[   28.430820][  T343]  ? vfs_writev (fs/read_write.c:1093)
[   28.431168][  T343]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   28.431513][  T343]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   28.431935][  T343] RIP: 0033:0x4909bd
[   28.432202][  T343] Code: 28 89 54 24 1c 48 89 74 24 10 89 7c 24 08 e8 fa 70 04 00 8b 54 24 1c 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 33 44 89 c7 48 89 44 24 08 e8 4e 71 04 00 48
All code
========
   0:	28 89 54 24 1c 48    	sub    %cl,0x481c2454(%rcx)
   6:	89 74 24 10          	mov    %esi,0x10(%rsp)
   a:	89 7c 24 08          	mov    %edi,0x8(%rsp)
   e:	e8 fa 70 04 00       	call   0x4710d
  13:	8b 54 24 1c          	mov    0x1c(%rsp),%edx
  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 14 00 00 00       	mov    $0x14,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 33                	ja     0x65
  32:	44 89 c7             	mov    %r8d,%edi
  35:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  3a:	e8 4e 71 04 00       	call   0x4718d
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 33                	ja     0x3b
   8:	44 89 c7             	mov    %r8d,%edi
   b:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  10:	e8 4e 71 04 00       	call   0x47163
  15:	48                   	rex.W
[   28.433423][  T343] RSP: 002b:00007ffcca674eb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
[   28.433945][  T343] RAX: ffffffffffffffda RBX: 00007ffcca675540 RCX: 00000000004909bd
[   28.434455][  T343] RDX: 0000000000000002 RSI: 00007ffcca674ef0 RDI: 0000000000000005
[   28.434971][  T343] RBP: 00007ffcca674f20 R08: 0000000000000000 R09: 00007ffcca674f80
[   28.435487][  T343] R10: 7fffffffffffffff R11: 0000000000000293 R12: 00007ffcca6754b8


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