[32505.280044] afs: Lost contact with volume location server 137.78.160.23 in cell jpl.nasa.gov (code -1)
[32562.434525] afs: Lost contact with volume location server 137.78.160.22 in cell jpl.nasa.gov (code -1)
[32619.588024] afs: Lost contact with volume location server 137.78.160.21 in cell jpl.nasa.gov (code -1)
[32702.319140] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[32702.319178] IP: [<ffffffffa018bb06>] afs_linux_dentry_revalidate+0x2f6/0x520 [openafs]
[32702.319231] PGD 2080b9067 PUD 2a0519067 PMD 0 
[32702.319249] Oops: 0000 [#1] SMP 
[32702.319262] Modules linked in: lockd sunrpc vmw_balloon coretemp ppdev crct10dif_pclmul crc32_pclmul crc32c_intel vmxnet3 ghash_clmulni_intel serio_raw shpchp parport_pc parport vmw_vmci i2c_piix4 openafs(POE) vmwgfx vmw_pvscsi drm_kms_helper ttm drm ata_generic pata_acpi ip6table_filter ip6_tables xt_owner xt_LOG fuse binfmt_misc
[32702.319394] CPU: 1 PID: 18329 Comm: python Tainted: P           OE  3.17.3-200.fc20.x86_64 #1
[32702.319422] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/30/2013
[32702.319454] task: ffff88029c3ca740 ti: ffff88023cd78000 task.ti: ffff88023cd78000
[32702.320415] RIP: 0010:[<ffffffffa018bb06>]  [<ffffffffa018bb06>] afs_linux_dentry_revalidate+0x2f6/0x520 [openafs]
[32702.321351] RSP: 0018:ffff88023cd7bba0  EFLAGS: 00010246
[32702.322274] RAX: 0000000000000000 RBX: ffff8802a13acd80 RCX: 0000000000000001
[32702.323195] RDX: 0000000aa824a824 RSI: 0000000000000009 RDI: ffff8800a9342d18
[32702.324089] RBP: ffff88023cd7bc00 R08: 696d2f6d2f67726f R09: 8080808080808080
[32702.324973] R10: fefefefefefefeff R11: ffff8802a13acd80 R12: ffff8800a939ec00
[32702.325845] R13: ffff8800a9342cc0 R14: ffff8802803fc000 R15: ffff88028145cde0
[32702.326705] FS:  00007f9216a4b700(0000) GS:ffff8802bfc40000(0000) knlGS:0000000000000000
[32702.327540] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[32702.328368] CR2: 0000000000000004 CR3: 0000000231d17000 CR4: 00000000000007e0
[32702.329245] Stack:
[32702.330060]  ffff88023cd7bbf8 ffff8800a939ec00 0000000000000000 0000000000000000
[32702.330877]  ffffffff00000001 ffff8800aa09b034 00000000de7a80b6 ffff88023cd7bdc0
[32702.331704]  ffff8802a13acd80 ffff88023cd7bc98 ffff88023cd7bc88 ffff88028145cde0
[32702.332547] Call Trace:
[32702.333388]  [<ffffffff8120c1ed>] lookup_fast+0x26d/0x2f0
[32702.334247]  [<ffffffff812ff27c>] ? security_inode_permission+0x1c/0x30
[32702.335121]  [<ffffffff8120d327>] link_path_walk+0x1a7/0x880
[32702.335997]  [<ffffffff8120da6b>] path_lookupat+0x6b/0x790
[32702.336890]  [<ffffffff811e48c5>] ? kmem_cache_alloc+0x35/0x1f0
[32702.337750]  [<ffffffff8120ca0f>] ? getname_flags+0x4f/0x1a0
[32702.338614]  [<ffffffff8120e1bb>] filename_lookup+0x2b/0xc0
[32702.339476]  [<ffffffff81212417>] user_path_at_empty+0x67/0xc0
[32702.340328]  [<ffffffff811269f2>] ? from_kgid_munged+0x12/0x20
[32702.341187]  [<ffffffff81206d0f>] ? cp_new_stat+0x14f/0x180
[32702.342035]  [<ffffffff81212481>] user_path_at+0x11/0x20
[32702.342864]  [<ffffffff81206803>] vfs_fstatat+0x63/0xc0
[32702.343686]  [<ffffffff81206d6e>] SYSC_newstat+0x2e/0x60
[32702.344512]  [<ffffffff81131436>] ? __audit_syscall_exit+0x1f6/0x2a0
[32702.345331]  [<ffffffff8120703e>] SyS_newstat+0xe/0x10
[32702.346133]  [<ffffffff817301a9>] system_call_fastpath+0x16/0x1b
[32702.346912] Code: 80 00 00 00 00 48 89 df 48 c7 45 b8 00 00 00 00 e8 70 ca 08 e1 4c 8b 70 30 49 89 c5 49 8b 84 24 28 03 00 00 41 8b 8e a4 02 00 00 <39> 48 04 0f 84 af 00 00 00 e8 1c f5 f9 ff 48 8b 73 28 48 8d 55 
[32702.348641] RIP  [<ffffffffa018bb06>] afs_linux_dentry_revalidate+0x2f6/0x520 [openafs]
[32702.349499]  RSP <ffff88023cd7bba0>
[32702.350303] CR2: 0000000000000004
[32702.352998] ---[ end trace 9f8d7be6098ed4f3 ]--