The kernel panic:

------------[ cut here ]------------
[  230.528076] kernel BUG at /build/buildd/linux-lts-utopic-3.16.0/net/ipv4/tcp_output.c:878!
[  230.528155] invalid opcode: 0000 [#1] SMP 
[  230.528203] Modules linked in: rpcsec_gss_krb5 nfsv4 nls_utf8 isofs vhost_net vhost macvtap macvlan autofs4 bridge stp llc arc4 iwldvm mac80211 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm snd_hda_codec_conexant snd_hda_codec_generic iwlwifi crct10dif_pclmul btusb crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_controller nfsd snd_hda_codec aesni_intel auth_rpcgss nfs_acl snd_hwdep aes_x86_64 snd_seq_midi snd_seq_midi_event lrw thinkpad_acpi bluetooth cfg80211 snd_pcm gf128mul glue_helper snd_rawmidi rtsx_pci_ms ablk_helper nfs snd_seq cryptd memstick snd_seq_device 6lowpan_iphc snd_timer nvram joydev lockd parport_pc snd sunrpc ppdev mei_me mei shpchp soundcore serio_raw binfmt_misc fscache mac_hid lp parport btrfs xor raid6_pq i915 i2c_algo_bit drm_kms_helper rtsx_pci_sdmmc psmouse r8169 ahci drm mii rtsx_pci libahci wmi video
[  230.529160] CPU: 1 PID: 2419 Comm: Chrome_IOThread Not tainted 3.16.0-37-generic #51~14.04.1-Ubuntu
[  230.529223] Hardware name: LENOVO 6885EXG/6885EXG, BIOS HEET47WW (1.28 ) 10/24/2014
[  230.529247] task: ffff880402cdbd20 ti: ffff8803d3948000 task.ti: ffff8803d3948000
[  230.529270] RIP: 0010:[<ffffffff816b845f>]  [<ffffffff816b845f>] tcp_transmit_skb+0x72f/0x900
[  230.529302] RSP: 0018:ffff8803d394bae8  EFLAGS: 00010246
[  230.529319] RAX: 00000000000002c0 RBX: ffff8800c1490700 RCX: 00000000000000d0
[  230.529352] RDX: 0000000000000001 RSI: ffff880403bdf600 RDI: ffff8803d0d01000
[  230.529397] RBP: ffff8803d394bb40 R08: 00000000000002c0 R09: 0000000000000500
[  230.529441] R10: ffff88040dc03500 R11: ffff8800c1490ce4 R12: ffff880403bdf600
[  230.529486] R13: ffff8803d0ca1700 R14: 00000000000000ae R15: ffff880403bdf600
[  230.529531] FS:  00007f8314069700(0000) GS:ffff88041e240000(0000) knlGS:0000000000000000
[  230.529581] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  230.529617] CR2: 00003d742c856008 CR3: 00000003d8e52000 CR4: 00000000001407e0
[  230.529661] Stack:
[  230.529676]  00ff8803d0ca1700 ffff8800c1490700 00000000000000b0 ffff8800c1490700
[  230.529732]  00000000000000ae ffffffff81398a63 ffff8800c1490700 ffff880403bdee00
[  230.529787]  ffff8803d0ca1700 00000000000000ae ffff880403bdf600 ffff8803d394bb98
[  230.529841] Call Trace:
[  230.529864]  [<ffffffff81398a63>] ? memcpy_fromiovecend+0x83/0xb0
[  230.529905]  [<ffffffff816b9a9e>] tcp_connect+0x47e/0x7a0
[  230.529943]  [<ffffffff816be537>] tcp_v4_connect+0x317/0x470
[  230.529981]  [<ffffffff816d3fd5>] __inet_stream_connect+0xa5/0x320
[  230.530023]  [<ffffffff813863f0>] ? cpumask_next_and+0x30/0x50
[  230.530065]  [<ffffffff811b79c6>] ? kmem_cache_alloc_trace+0x1c6/0x1f0
[  230.530108]  [<ffffffff816aad23>] ? tcp_sendmsg+0x4e3/0xce0
[  230.530145]  [<ffffffff816aad60>] tcp_sendmsg+0x520/0xce0
[  230.530185]  [<ffffffff8133457d>] ? aa_sk_perm.isra.4+0x6d/0x150
[  230.530225]  [<ffffffff816d52d4>] inet_sendmsg+0x64/0xb0
[  230.530261]  [<ffffffff81329c31>] ? apparmor_socket_sendmsg+0x21/0x30
[  230.530304]  [<ffffffff81648bbb>] sock_sendmsg+0x8b/0xc0
[  230.530342]  [<ffffffff811f11e5>] ? __fget_light+0x25/0x70
[  230.530378]  [<ffffffff811f1243>] ? __fdget+0x13/0x20
[  230.530424]  [<ffffffff81648d61>] SYSC_sendto+0x121/0x1c0
[  230.530467]  [<ffffffff811d42f1>] ? vfs_read+0xf1/0x170
[  230.530505]  [<ffffffff8164983e>] SyS_sendto+0xe/0x10
[  230.530576]  [<ffffffff8176d20d>] system_call_fastpath+0x1a/0x1f
[  230.530638] Code: 58 ab f9 ff 49 89 c4 e9 7a f9 ff ff 8b 8b c4 05 00 00 89 ca d1 e9 c1 ea 02 01 d1 8b 93 c0 05 00 00 39 d1 0f 43 d1 e9 39 ff ff ff <0f> 0b 41 8b 54 24 40 39 c2 0f 89 9d fb ff ff 8d 88 00 00 ff ff 
[  230.530951] RIP  [<ffffffff816b845f>] tcp_transmit_skb+0x72f/0x900
[  230.533192]  RSP <ffff8803d394bae8>
[  230.543212] ---[ end trace 132cb34755df885a ]---
[  247.400843] ------------[ cut here ]------------
[  247.401956] kernel BUG at /build/buildd/linux-lts-utopic-3.16.0/net/ipv4/tcp_output.c:878!
[  247.403046] invalid opcode: 0000 [#2] SMP 
[  247.404004] Modules linked in: rpcsec_gss_krb5 nfsv4 nls_utf8 isofs vhost_net vhost macvtap macvlan autofs4 bridge stp llc arc4 iwldvm mac80211 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm snd_hda_codec_conexant snd_hda_codec_generic iwlwifi crct10dif_pclmul btusb crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_controller nfsd snd_hda_codec aesni_intel auth_rpcgss nfs_acl snd_hwdep aes_x86_64 snd_seq_midi snd_seq_midi_event lrw thinkpad_acpi bluetooth cfg80211 snd_pcm gf128mul glue_helper snd_rawmidi rtsx_pci_ms ablk_helper nfs snd_seq cryptd memstick snd_seq_device 6lowpan_iphc snd_timer nvram joydev lockd parport_pc snd sunrpc ppdev mei_me mei shpchp soundcore serio_raw binfmt_misc fscache mac_hid lp parport btrfs xor raid6_pq i915 i2c_algo_bit drm_kms_helper rtsx_pci_sdmmc psmouse r8169 ahci drm mii rtsx_pci libahci wmi video
[  247.410093] CPU: 0 PID: 2627 Comm: Chrome_IOThread Tainted: G      D       3.16.0-37-generic #51~14.04.1-Ubuntu
[  247.411110] Hardware name: LENOVO 6885EXG/6885EXG, BIOS HEET47WW (1.28 ) 10/24/2014
[  247.412118] task: ffff880405fb0a30 ti: ffff8800c1cc8000 task.ti: ffff8800c1cc8000
[  247.413112] RIP: 0010:[<ffffffff816b845f>]  [<ffffffff816b845f>] tcp_transmit_skb+0x72f/0x900
[  247.414136] RSP: 0018:ffff8800c1ccbae8  EFLAGS: 00010246
[  247.415148] RAX: 00000000000002c0 RBX: ffff880405eeb800 RCX: 00000000000000d0
[  247.416181] RDX: 0000000000000001 RSI: ffff880404338a00 RDI: ffff880407394400
[  247.417205] RBP: ffff8800c1ccbb40 R08: 00000000000002c0 R09: 0000000000000500
[  247.418239] R10: ffff88040dc03500 R11: ffff880405eebde4 R12: ffff880404338a00
[  247.419265] R13: ffff8803d0e44040 R14: 00000000000000d0 R15: ffff880404338a00
[  247.420289] FS:  00007f03c7eba700(0000) GS:ffff88041e200000(0000) knlGS:0000000000000000
[  247.421318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  247.422338] CR2: 000010a8fed34008 CR3: 00000003d3bf1000 CR4: 00000000001407f0
[  247.423364] Stack:
[  247.424377]  00ff8803d0e44040 ffff880405eeb800 00000000000000d0 ffff880405eeb800
[  247.425417]  00000000000000d0 ffffffff81398a63 ffff880405eeb800 ffff88040433a600
[  247.426454]  ffff8803d0e44040 00000000000000d0 ffff880404338a00 ffff8800c1ccbb98
[  247.427493] Call Trace:
[  247.428529]  [<ffffffff81398a63>] ? memcpy_fromiovecend+0x83/0xb0
[  247.429577]  [<ffffffff816b9a9e>] tcp_connect+0x47e/0x7a0
[  247.430616]  [<ffffffff816be537>] tcp_v4_connect+0x317/0x470
[  247.431653]  [<ffffffff816d3fd5>] __inet_stream_connect+0xa5/0x320
[  247.432692]  [<ffffffff813863f0>] ? cpumask_next_and+0x30/0x50
[  247.433739]  [<ffffffff811b79c6>] ? kmem_cache_alloc_trace+0x1c6/0x1f0
[  247.434796]  [<ffffffff816aad23>] ? tcp_sendmsg+0x4e3/0xce0
[  247.436124]  [<ffffffff816aad60>] tcp_sendmsg+0x520/0xce0
[  247.437805]  [<ffffffff8133457d>] ? aa_sk_perm.isra.4+0x6d/0x150
[  247.439461]  [<ffffffff816d52d4>] inet_sendmsg+0x64/0xb0
[  247.441059]  [<ffffffff81329c31>] ? apparmor_socket_sendmsg+0x21/0x30
[  247.442695]  [<ffffffff81648bbb>] sock_sendmsg+0x8b/0xc0
[  247.444318]  [<ffffffff811f11e5>] ? __fget_light+0x25/0x70
[  247.445664]  [<ffffffff811f1243>] ? __fdget+0x13/0x20
[  247.447109]  [<ffffffff81648d61>] SYSC_sendto+0x121/0x1c0
[  247.448613]  [<ffffffff811d42f1>] ? vfs_read+0xf1/0x170
[  247.449804]  [<ffffffff8164983e>] SyS_sendto+0xe/0x10
[  247.451250]  [<ffffffff8176d20d>] system_call_fastpath+0x1a/0x1f
[  247.452610] Code: 58 ab f9 ff 49 89 c4 e9 7a f9 ff ff 8b 8b c4 05 00 00 89 ca d1 e9 c1 ea 02 01 d1 8b 93 c0 05 00 00 39 d1 0f 43 d1 e9 39 ff ff ff <0f> 0b 41 8b 54 24 40 39 c2 0f 89 9d fb ff ff 8d 88 00 00 ff ff 
[  247.455563] RIP  [<ffffffff816b845f>] tcp_transmit_skb+0x72f/0x900
[  247.457061]  RSP <ffff8800c1ccbae8>
[  247.458581] ---[ end trace 132cb34755df885b ]---