Kernel panic in _Z33gpfsIsCifsBypassTraversalCheckingv() function.

Issue

• Kernel panic with following call traces.

BUG: unable to handle kernel paging request at ffffc900d1ad09c4
IP: [<ffffffffa05ec5f7>] _Z33gpfsIsCifsBypassTraversalCheckingv+0x7/0x10 [mmfs26]
PGD 408041b067 PUD 13ff01b2067 PMD 17fe7366067 PTE 0
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/cpu159/cache/index2/shared_cpu_map
CPU 81 
Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler vfat fat ext3 jbd usb_storage fuse ip_vs libcrc32c mmfs26(U) mmfslinux(U) tracedev(U) ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge mpt2sas scsi_transport_sas raid_class mptctl mptbase autofs4 sunrpc target_core_iblock target_core_file target_core_pscsi target_core_mod configfs bnx2fc cnic uio fcoe libfcoe libfc scsi_transport_fc scsi_tgt cpufreq_ondemand acpi_cpufreq freq_table mperf cachefiles fscache(T) bonding 8021q garp stp llc ipv6 vhost_net macvtap macvlan tun kvm_intel kvm uinput microcode sg serio_raw cdc_ether usbnet mii i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support shpchp ioatdma i7core_edac edac_core be2net igb dca bnx2 ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix megaraid_sas dm_mirror dm_region_hash dm_log dm_mod [last unloaded: tracedev]

Pid: 107906, comm: ps Tainted: G           ---------------  T 2.6.32-279.22.1.el6.x86_64 #1 IBM System x3850 X5 -[7143S56]-/Node 1, Processor Card
RIP: 0010:[<ffffffffa05ec5f7>]  [<ffffffffa05ec5f7>] _Z33gpfsIsCifsBypassTraversalCheckingv+0x7/0x10 [mmfs26]
RSP: 0018:ffff89bf91f45b70  EFLAGS: 00010246
RAX: ffffc900d1ab5000 RBX: ffff883fb3148ac0 RCX: 0000000000000005
RDX: ffff89bdfafe7bb8 RSI: ffff89bdfafe7bb9 RDI: ffffffffa0575065
RBP: ffff89bf91f45c98 R08: 0000000000000000 R09: 0000000000000001
R10: 00000000fffffffc R11: 0000000000000246 R12: 0000000000000001
R13: ffff89bf91f45ba8 R14: ffff897fe8289dc0 R15: ffff883fb3148d10
FS:  00007f90021677a0(0000) GS:ffff88018f6c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900d1ad09c4 CR3: 0000003fcae02000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ps (pid: 107906, threadinfo ffff89bf91f44000, task ffff89bdfafe7540)
Stack:
 ffffffffa0566aab 0000000000000000 0000000093816649 ffff89bf91f45c28
<d> ffff883fcb6d83b9 ffffffff817a8c84 0000000100000082 ffff8833cfa90ad0
<d> ffff89ffe74c5b00 ffff89bf91f45bd8 ffffffff8118ef4a ffff89bf91f45d18
Call Trace:
 [<ffffffffa0566aab>] ? gpfs_i_permission+0x20b/0x300 [mmfslinux]
 [<ffffffff8118ef4a>] ? dput+0x9a/0x150
 [<ffffffff811846e0>] ? follow_managed+0x150/0x2d0
 [<ffffffff811848ff>] ? do_lookup+0x9f/0x230
 [<ffffffff81184c3d>] __link_path_walk+0xad/0x1030
 [<ffffffff81185e4a>] path_walk+0x6a/0xe0
 [<ffffffff8118601b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186c87>] user_path_at+0x57/0xa0
 [<ffffffff810ea944>] ? rb_reserve_next_event+0xb4/0x370
 [<ffffffff810eadb2>] ? ring_buffer_lock_reserve+0xa2/0x160
 [<ffffffff8117b90c>] vfs_fstatat+0x3c/0x80
 [<ffffffff810d3f47>] ? audit_syscall_entry+0x1d7/0x200
 [<ffffffff8117ba7b>] vfs_stat+0x1b/0x20
 [<ffffffff8117baa4>] sys_newstat+0x24/0x50
 [<ffffffff810177c8>] ? syscall_trace_enter+0x1d8/0x1e0
 [<ffffffff8100b229>] ? tracesys+0x7a/0xde
 [<ffffffff8100b288>] tracesys+0xd9/0xde
Code: 66 66 66 90 48 85 ff b8 16 00 00 00 74 07 8b 47 18 89 06 31 c0 f3 c3 90 66 66 66 90 66 66 66 90 66 66 66 90 48 8b 05 e9 d1 11 00 <8b> 80 c4 b9 01 00 c3 66 90 48 89 37 48 89 57 30 80 3d b8 f2 f8 
RIP  [<ffffffffa05ec5f7>] _Z33gpfsIsCifsBypassTraversalCheckingv+0x7/0x10 [mmfs26]
 RSP <ffff89bf91f45b70>
CR2: ffffc900d1ad09c4