======================================
|
| [   56.934990] ------------[ cut here ]------------
| [   56.935092] kernel BUG at net/core/skbuff.c:2813!
| [   56.935133] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
[   56.935224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   56.935298] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[ 56.935336] Code: 44 24 10 e8 ad e4 81 ff 49 8b be c0 00 00 00 44 8b 44 24 10 41 8b 8e bc 00 00 00 e9 f4 fc ff ff 4c 8d 48 ff e9 41 fd ff ff 90 <0f> 0b 48 c7 44 24 10 00 00 00 00 e9 99 fe ff ff 41 f6 44 24 7e 20
All code
========
   0:	44 24 10             	rex.R and $0x10,%al
   3:	e8 ad e4 81 ff       	call   0xffffffffff81e4b5
   8:	49 8b be c0 00 00 00 	mov    0xc0(%r14),%rdi
   f:	44 8b 44 24 10       	mov    0x10(%rsp),%r8d
  14:	41 8b 8e bc 00 00 00 	mov    0xbc(%r14),%ecx
  1b:	e9 f4 fc ff ff       	jmp    0xfffffffffffffd14
  20:	4c 8d 48 ff          	lea    -0x1(%rax),%r9
  24:	e9 41 fd ff ff       	jmp    0xfffffffffffffd6a
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	48 c7 44 24 10 00 00 	movq   $0x0,0x10(%rsp)
  33:	00 00 
  35:	e9 99 fe ff ff       	jmp    0xfffffffffffffed3
  3a:	41 f6 44 24 7e 20    	testb  $0x20,0x7e(%r12)

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	48 c7 44 24 10 00 00 	movq   $0x0,0x10(%rsp)
   9:	00 00 
   b:	e9 99 fe ff ff       	jmp    0xfffffffffffffea9
  10:	41 f6 44 24 7e 20    	testb  $0x20,0x7e(%r12)
[   56.935438] RSP: 0018:ffffa347c0114dc0 EFLAGS: 00010282
[   56.935471] RAX: 00000000fffffff2 RBX: 0000000000000014 RCX: 0000000000000014
[   56.935518] RDX: ffff89a8423d1b44 RSI: 0000000000000100 RDI: 0000000000000000
[   56.935559] RBP: ffffa347c0114e00 R08: 00000000ffffffd8 R09: ffff89a8423a2000
[   56.935625] R10: 0000000000000008 R11: ffff89a841b6b7d4 R12: ffff89a8423a7000
[   56.935671] R13: 0000000000000014 R14: ffff89a841b6b700 R15: 0000000000000002
[   56.935713] FS:  00007f0465858740(0000) GS:ffff89a87fd00000(0000) knlGS:0000000000000000
[   56.935760] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   56.935800] CR2: 00007fff08fca000 CR3: 0000000003226001 CR4: 0000000000770ef0
[   56.935842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   56.935887] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   56.935928] PKRU: 55555554
[   56.935942] Call Trace:
[   56.935960]  <IRQ>
[   56.935981] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) 
[   56.936010] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) 
[   56.936037] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   56.936058] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) 
[   56.936083] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   56.936104] ? exc_invalid_op (arch/x86/kernel/traps.c:265) 
[   56.936130] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   56.936156] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[   56.936183] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) 
[   56.936209] ? tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2417) 
[   56.936236] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) 
[   56.936264] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1139 ./include/net/dst_metadata.h:94 net/ipv4/ip_input.c:364) 
[   56.936300] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) 
[   56.936325] ? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) 
[   56.936358] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) 
[   56.936393] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) 
[   56.936417] __napi_poll (net/core/dev.c:6703) 
[   56.936445] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) 
[   56.936470] __do_softirq (kernel/softirq.c:553) 
[   56.936498] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) 
[   56.936523]  </IRQ>
[   56.936541]  <TASK>
[   56.936555] __local_bh_enable_ip (kernel/softirq.c:381) 
[   56.936581] __dev_queue_xmit (net/core/dev.c:4400) 
[   56.936602] ? eth_header (net/ethernet/eth.c:85) 
[   56.936628] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[   56.936655] __ip_queue_xmit (net/ipv4/ip_output.c:535) 
[   56.936683] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) 
[   56.936713] ? release_sock (./include/linux/list.h:373 ./include/linux/wait.h:127 net/core/sock.c:3557) 
[   56.936739] tcp_write_xmit (net/ipv4/tcp_output.c:2792) 
[   56.936765] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) 
[   56.936797] __tcp_close (net/ipv4/tcp.c:2842) 
[   56.936825] tcp_close (net/ipv4/tcp.c:2932) 
[   56.936849] inet_release (net/ipv4/af_inet.c:436) 
[   56.936877] __sock_release (net/socket.c:659) 
[   56.936903] sock_close (net/socket.c:1423) 
[   56.936928] __fput (fs/file_table.c:376) 
[   56.936956] __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) 
[   56.936982] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[   56.937010] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[   56.937046] RIP: 0033:0x7f046599a007
[ 56.937073] Code: ff e8 fd e2 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 cb f5 ff
All code
========
   0:	ff                   	(bad)
   1:	e8 fd e2 01 00       	call   0x1e303
   6:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 03 00 00 00       	mov    $0x3,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 41                	ja     0x73
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  3b:	e8 c3 cb f5 ff       	call   0xfffffffffff5cc03

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 41                	ja     0x49
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 7c 24 0c          	mov    %edi,0xc(%rsp)
  11:	e8 c3 cb f5 ff       	call   0xfffffffffff5cbd9
[   56.937174] RSP: 002b:00007fff08eb4c08 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   56.937221] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f046599a007
[   56.937262] RDX: 0000000000000028 RSI: 0000018e11351bf0 RDI: 0000000000000006
[   56.937304] RBP: 0000000000000006 R08: 00007fff08fc9080 R09: 00007fff08eb4cc0
[   56.937345] R10: 7fffffffffffffff R11: 0000000000000246 R12: 00007fff08eb4cc0


Finger prints:
__pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core