Kernel panicked in rfs_root_rem_rpath() function of [redirfs] module.

Issue

• Kernel panic occurred at rfs_root_rem_rpath() function due to 3rd party module [redirfs].
• Kernel panics with following messages:

<1>BUG: unable to handle kernel NULL pointer dereference at 0000000000000060 <=
<1>IP: [<ffffffffa02a730e>] rfs_root_rem_rpath+0xe/0x80 [redirfs]
<4>Kernel PGD 0 
<4>User   PGD 0 
<4>Oops: 0002 [#1] SMP 
<4>last sysfs file: /sys/fs/redirfs/filters/ampavflt/paths
<4>Modules linked in: ampavflt(U) ampnetworkflow(U) redirfs(U) microcode vmware_balloon i2c_piix4 sg shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom vmxnet3 vmw_pvscsi pata_acpi ata_generic ata_piix vmwgfx ttm drm_kms_helper drm i2c_core dm_mirror dm_region_hash dm_log dm_mod [last unloaded: vmci]
<4>Pid: 6969, comm: signal_handler Not tainted 2.6.32-754.50.1.el6.x86_64 #1 VMware, Inc. VMware Virtual
Platform/440BX Desktop Reference Platform
<4>RIP: 0010:[<ffffffffa02a730e>]  [<ffffffffa02a730e>] rfs_root_rem_rpath+0xe/0x80 [redirfs]
<4>RSP: 0018:ffff8806ae09bd18  EFLAGS: 00010296
<4>RAX: 00000000ffffffea RBX: ffff88018b607940 RCX: 0000000000000000
<4>RDX: 00000000ffffffff RSI: ffff88018b607940 RDI: 0000000000000000
<4>RBP: ffff8806ae09bd28 R08: 0000000000000001 R09: 0000000000000000
<4>R10: ffff88012464a3c0 R11: 00000000000000c0 R12: ffff88018b607940
<4>R13: ffff88012464a3c0 R14: ffff88082d5e1c58 R15: ffff880769fd2bc0
<4>FS:  00007f94131ee700(0000) GS:ffff880046140000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>CR2: 0000000000000060 CR3: 00000001d4ffe000 CR4: 00000000001607e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
<4>Process signal_handler (pid: 6969, threadinfo ffff8806ae098000, task ffff88022c651520)
<4>Stack:
<4> ffff88082d5e1c58 ffff88018b607940 ffff8806ae09bd48 ffffffffa02a5843
<4><d> ffff88082d5e1800 ffff88082d5e1800 ffff8806ae09bd88 ffffffffa02a596d
<4><d> ffff88082d5e1c58 ffff8808ffffffea ffff88082d5e1800 0000000000000000
<4>Call Trace:
<4> [<ffffffffa02a5843>] rfs_path_rem+0x33/0x70 [redirfs]
<4> [<ffffffffa02a596d>] redirfs_rem_path+0xed/0x1e0 [redirfs]
<4> [<ffffffffa02a5ad8>] redirfs_rem_paths+0x78/0xa0 [redirfs]
<4> [<ffffffffa02aeadd>] rfs_flt_paths_store+0x17d/0x1a0 [redirfs]
<4> [<ffffffffa02aed16>] rfs_flt_store+0x66/0xb0 [redirfs]
<4> [<ffffffff812216bc>] sysfs_write_file+0xdc/0x160
<4> [<ffffffff811a2e3a>] vfs_write+0xba/0x1a0
<4> [<ffffffff811a436f>] ? fget_light_pos+0x3f/0x50
<4> [<ffffffff815662c2>] ? system_call_after_swapgs+0xa2/0x152
<4> [<ffffffff811a3971>] sys_write+0x51/0xb0
<4> [<ffffffff815662c2>] ? system_call_after_swapgs+0xa2/0x152
<4> [<ffffffff815662ce>] ? system_call_after_swapgs+0xae/0x152
<4> [<ffffffff815663a7>] system_call_fastpath+0x35/0x3a
<4> [<ffffffff815662ce>] ? system_call_after_swapgs+0xae/0x152
<4>Code: 00 48 89 d8 4c 8b 65 f0 48 8b 5d e8 4c 8b 6d f8 c9 c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 <83> 6f 60 01 48 8b 4e 20 48 8b 56 28 48 8d 46 20 48 89 fb 48 89 
<1>RIP  [<ffffffffa02a730e>] rfs_root_rem_rpath+0xe/0x80 [redirfs] <==