Issue

• Kernel panic with following call traces,

BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<(null)>] (null)
PGD 2027684067 PUD 178b366067 PMD 0 
Oops: 0010 [#1] SMP 
last sysfs file: /sys/devices/pci0000:fe/0000:fe:1b.0/irq
CPU 0 
Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss lofs(U) efs100(P)(U) autofs4 ipmi_devintf ipmi_si ipmi_msghandler sunrpc cpufreq_ondemand acpi_cpufreq freq_table ipv6 dm_mirror dm_region_hash dm_log uinput sg cdc_ether usbnet mii serio_raw i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support shpchp bnx2 ioatdma dca i7core_edac edac_core ext3 jbd mbcache sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix pmcraid dm_mod [last unloaded: microcode]

Modules linked in: nfs lockd fscache nfs_acl auth_rpcgss lofs(U) efs100(P)(U) autofs4 ipmi_devintf ipmi_si ipmi_msghandler sunrpc cpufreq_ondemand acpi_cpufreq freq_table ipv6 dm_mirror dm_region_hash dm_log uinput sg cdc_ether usbnet mii serio_raw i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support shpchp bnx2 ioatdma dca i7core_edac edac_core ext3 jbd mbcache sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix pmcraid dm_mod [last unloaded: microcode]
Pid: 23283, comm: wscansw Tainted: P           ----------------  2.6.32-71.el6.x86_64 #1 System x3690 X5 -[7147AC1]-
RIP: 0010:[<0000000000000000>]  [<(null)>] (null)
RSP: 0018:ffff881e8ff65b60  EFLAGS: 00010286
RAX: ffffffffa028e0c0 RBX: ffff880292562e00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff880292562e00 RDI: ffff880adda35478
RBP: ffff881e8ff65ba8 R08: ffff880d288c7ea0 R09: 000000000000000a
R10: ffff880adda35478 R11: 000000000000000f R12: ffff881e8ff65bc8
R13: ffff880adda35478 R14: fffffffffffffff4 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff880028200000(0063) knlGS:00000000f76618d0
CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000001260aeb000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process wscansw (pid: 23283, threadinfo ffff881e8ff64000, task ffff8817091a0080)
Stack:
 ffffffff8117a722 ffff880d25445d60 ffff880adda35478 ffff881e8ff65b88
<0> ffff880d288c7e40 ffff880d25445d64 0000000000000000 ffff880d288c7e40
<0> ffff881e8ff65dd8 ffff881e8ff65be8 ffffffff8117a9f4 ffff881e8ff65be8
Call Trace:
 [<ffffffff8117a722>] ? __lookup_hash+0x102/0x160
 [<ffffffff8117a9f4>] lookup_one_len+0xb4/0x110
 [<ffffffff8118517c>] ? d_lookup+0x3c/0x60
 [<ffffffffa0100927>] lofs_lookup+0x2a7/0x3a0 [lofs]
 [<ffffffff8117a58b>] do_lookup+0x18b/0x220
 [<ffffffff8117abfd>] __link_path_walk+0x1ad/0x1040
 [<ffffffff8110be6e>] ? find_get_page+0x1e/0xa0
 [<ffffffff81013c8e>] ? apic_timer_interrupt+0xe/0x20
 [<ffffffff8117bd1a>] path_walk+0x6a/0xe0
 [<ffffffff8117beeb>] do_path_lookup+0x5b/0xa0
 [<ffffffff8117cb57>] user_path_at+0x57/0xa0
 [<ffffffff8125ec8e>] ? rb_erase+0x24e/0x310
 [<ffffffff81258ae5>] ? _atomic_dec_and_lock+0x55/0x80
 [<ffffffff8118b300>] ? mntput_no_expire+0x30/0x110
 [<ffffffff81171d3c>] vfs_fstatat+0x3c/0x80
 [<ffffffff81171eab>] vfs_stat+0x1b/0x20
 [<ffffffff8104de04>] sys32_stat64+0x24/0x40
 [<ffffffff8104ca7f>] sysenter_dispatch+0x7/0x2e
Code:  Bad RIP value.
RIP  [<(null)>] (null)
 RSP <ffff881e8ff65b60>
CR2: 0000000000000000