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kernel BUG at net/core/dev.c:2192!
invalid opcode: 0000 [#1] PREEMPT SMP 
Modules linked in: ctr camellia_generic camellia_x86_64 cast5_generic cast_common rmd160 l2tp_ppp l2tp_netlink l2tp_core pppoe pppox ppp_generic slhc ccm serpent_sse2_x86_64 serpent_generic ablk_helper cryptd blowfish_generic blowfish_x86_64 blowfish_common twofish_x86_64_3way xts glue_helper twofish_x86_64 twofish_common xcbc sha512_generic ah4 esp4 xfrm4_mode_beet xfrm4_tunnel xfrm4_mode_tunnel xfrm4_mode_transport ipcomp tun fuse ipt_MASQUERADE xt_nat iptable_nat nf_nat_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 xt_mark xt_connmark iptable_mangle xt_TCPMSS xt_tcpudp iptable_filter ip_tables x_tables nf_nat_sip nf_conntrack_sip nf_nat_irc nf_conntrack_irc nf_nat_h323 nf_conntrack_h323 nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack sch_teql ip_gre gre
CPU 0 
Pid: 0, comm: swapper/0 Not tainted 3.9.0-js1 #1  
RIP: e030:[<ffffffff81356c3f>]  [<ffffffff81356c3f>] skb_checksum_help+0x18f/0x1a0
RSP: e02b:ffff88003f603cf8  EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff88001ee7d100 RCX: 0000000000000140
RDX: 0000000000000054 RSI: 0000000000000000 RDI: ffff88001ee7d100
RBP: 00000000ffffffea R08: ffff88002096d500 R09: 000000000000ffff
R10: ffff88000ccab760 R11: 0000000000000001 R12: ffff88003bb75000
R13: ffff88003bbc1a9c R14: ffff88001ee7d100 R15: ffff88003c38e200
FS:  00007f3b2db5d700(0000) GS:ffff88003f600000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffffff600400 CR3: 000000000d200000 CR4: 0000000000000660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper/0 (pid: 0, threadinfo ffffffff81800000, task ffffffff81813440)
Stack:
 0000000000000000 ffff88003bb75000 ffff88003bb75000 ffff88003bbc1a9c
 ffffffff8135b069 ffffffffa001a9ad ffffffffa000dd80 ffffffffa0013745
 ffff88001ee7d100 ffff88001ee7d100 ffff88003bbc1a00 ffff88003c38e200
Call Trace:
 <IRQ> 
 [<ffffffff8135b069>] ? dev_hard_start_xmit+0x4d9/0x540
 [<ffffffffa001a9ad>] ? nf_ct_deliver_cached_events+0xad/0x100 [nf_conntrack]
 [<ffffffffa0013745>] ? __nf_conntrack_confirm+0x175/0x340 [nf_conntrack]
 [<ffffffff81376c5d>] ? sch_direct_xmit+0xed/0x1e0
 [<ffffffff8135b282>] ? dev_queue_xmit+0x1b2/0x460
 [<ffffffff8138d60c>] ? ip_finish_output+0x21c/0x3a0
 [<ffffffff81358cbb>] ? __netif_receive_skb_core+0x61b/0x850
 [<ffffffff81359f2d>] ? process_backlog+0x9d/0x180
 [<ffffffff81359d69>] ? net_rx_action+0x149/0x270
 [<ffffffff81052ce6>] ? __do_softirq+0xe6/0x290
 [<ffffffff81052fce>] ? irq_exit+0x7e/0x90
 [<ffffffff81280a87>] ? xen_evtchn_do_upcall+0x27/0x40
 [<ffffffff8145547e>] ? xen_do_hypervisor_callback+0x1e/0x30
 <EOI> 
 [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
 [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
 [<ffffffff8100af2c>] ? xen_safe_halt+0xc/0x20
 [<ffffffff8101c9cf>] ? default_idle+0x3f/0x170
 [<ffffffff8101d5b6>] ? cpu_idle+0xa6/0xf0
 [<ffffffff81893dc5>] ? start_kernel+0x354/0x35f
 [<ffffffff81893894>] ? repair_env_string+0x58/0x58
 [<ffffffff81896d21>] ? xen_start_kernel+0x3d5/0x3db
Code: 72 39 c1 0f 87 62 ff ff ff e9 79 ff ff ff 66 0f 1f 44 00 00 b8 f4 ff ff ff eb 8f 90 e8 1f 32 0f 00 b8 ea ff ff ff e9 7f ff ff ff <0f> 0b 0f 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 41 56 45 31 
RIP  [<ffffffff81356c3f>] skb_checksum_help+0x18f/0x1a0
 RSP <ffff88003f603cf8>
---[ end trace 54a54b8ebfc50c7b ]---