BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: [<ffffffffb7221467>] propagate_one+0xc7/0x1e0
PGD d51a5067 PUD d523f067 PMD 0 
Oops: 0000 [#1] SMP 
Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 bridge stp llc ebtable_filter ebtables overlay ctr ccm binfmt_misc rfcomm bnep dm_crypt intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul dm_multipath scsi_dh snd_hda_codec_hdmi crc32_pclmul ghash_clmulni_intel aesni_intel snd_hda_codec_conexant snd_hda_codec_generic aes_x86_64 lrw gf128mul snd_hda_intel glue_helper snd_hda_controller arc4 ablk_helper snd_hda_codec cryptd snd_seq_midi snd_usb_audio iwldvm snd_seq_midi_event snd_usbmidi_lib snd_hwdep serio_raw mac80211 uvcvideo snd_rawmidi snd_pcm videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common btusb videodev media iwlwifi snd_seq bluetooth thinkpad_acpi cfg80211 snd_seq_device snd_timer nvram mei_me mei lpc_ich xt_hl snd ip6t_rt shpchp soundcore mac_hid nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat cuse nf_conntrack_ftp nf_conntrack nfsd iptable_filter ip_tables parport_pc auth_rpcgss nfs_acl ppdev x_tables lockd grace lp sunrpc parport autofs4 hid_generic usbhid hid i915 psmouse ahci libahci e1000e i2c_algo_bit drm_kms_helper sdhci_pci drm ptp sdhci pps_core wmi video
CPU: 3 PID: 2255 Comm: mount.ecryptfs_ Not tainted 3.19.0-11-generic #11-Ubuntu
Hardware name: LENOVO 4286CTO/4286CTO, BIOS 8DET68WW (1.38 ) 04/11/2013
task: ffff880211c7ebf0 ti: ffff8800d5cf4000 task.ti: ffff8800d5cf4000
RIP: 0010:[<ffffffffb7221467>]  [<ffffffffb7221467>] propagate_one+0xc7/0x1e0
RSP: 0018:ffff8800d5cf7da8  EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff880210841e00 RCX: ffff8800d64b7540
RDX: 0000000000000000 RSI: 000000000000006a RDI: ffff8802146b5400
RBP: ffff8800d5cf7db8 R08: 0000000000000001 R09: ffffffffb73b611d
R10: ffff88021e2d7780 R11: ffffea0003512a00 R12: ffff8800d42c0500
R13: ffff8800d5cf7e10 R14: ffff880210841e00 R15: ffff8800d5cf7eb8
FS:  00007f031bf26700(0000) GS:ffff88021e2c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000010 CR3: 0000000035822000 CR4: 00000000000407e0
Stack:
 ffff880210841e00 ffff8800d42c0500 ffff8800d5cf7df8 ffffffffb7221a3b
 ffffffffb7214f6b 0000000000000028 ffff8802146b5e00 ffff8800d42c0500
 0000000000000000 ffff880211cac640 ffff8800d5cf7e48 ffffffffb7215942
Call Trace:
 [<ffffffffb7221a3b>] propagate_mnt+0x13b/0x170
 [<ffffffffb7214f6b>] ? lock_mount+0x12b/0x1d0
 [<ffffffffb7215942>] attach_recursive_mnt+0x132/0x220
 [<ffffffffb7215a85>] graft_tree+0x55/0x70
 [<ffffffffb7215b34>] do_add_mount+0x94/0xe0
 [<ffffffffb7216934>] do_mount+0x254/0xb20
 [<ffffffffb721751b>] SyS_mount+0x8b/0xd0
 [<ffffffffb77c86cd>] system_call_fastpath+0x16/0x1b
Code: 3b 96 d8 00 00 00 75 ec 48 89 35 55 03 d9 00 8b b6 10 01 00 00 48 89 05 40 03 d9 00 39 b1 10 01 00 00 74 19 48 8b 80 d8 00 00 00 <48> 8b 50 10 48 89 05 26 03 d9 00 48 89 15 27 03 d9 00 8b 53 30 
RIP  [<ffffffffb7221467>] propagate_one+0xc7/0x1e0
 RSP <ffff8800d5cf7da8>
CR2: 0000000000000010
---[ end trace 9162f9a283435f6f ]---