Kernel panic while running sisfim module's code.

Issue

• System crashed with following panic message

BUG: unable to handle kernel paging request at ffffffffffffffb0
IP: [<ffffffffa04f9b6b>] get_fs_mounts+0x9b/0x170 [sisfim]
PGD 194d067 PUD 194f067 PMD 0 
Oops: 0000 [#1] SMP 
Modules linked in: veth bridge stp llc sisfim(PE) vport_vxlan vxlan ip6_udp_tunnel udp_tunnel openvswitch xt_statistic xt_nat ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_recent xt_mark xt_addrtype iptable_nat nf_nat_ipv4 nf_nat vmw_vsock_vmci_transport vsock ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 xt_comment xt_conntrack nf_conntrack xt_multiport iptable_filter vfat fat dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio libcrc32c coretemp crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd ppdev vmw_balloon sg pcspkr parport_pc parport shpchp vmw_vmci i2c_piix4 nfsd auth_rpcgss nfs_acl lockd grace sunrpc binfmt_misc ip_tables ext4 mbcache jbd2 sr_mod cdrom ata_generic pata_acpi sd_mod crc_t10dif crct10dif_generic vmwgfx drm_kms_helper ttm crct10dif_pclmul
 crct10dif_common crc32c_intel serio_raw ata_piix drm vmxnet3 libata i2c_core vmw_pvscsi floppy dm_mirror dm_region_hash dm_log dm_mod
CPU: 5 PID: 548 Comm: systemd-journal Tainted: P            E  ------------   3.10.0-327.13.1.el7.x86_64 #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/21/2015
task: ffff88080da25080 ti: ffff88080fc04000 task.ti: ffff88080fc04000
RIP: 0010:[<ffffffffa04f9b6b>]  [<ffffffffa04f9b6b>] get_fs_mounts+0x9b/0x170 [sisfim]
..
Stack:
..
Call Trace:
 [<ffffffff811fe74e>] ? mntput_no_expire+0x3e/0x120
 [<ffffffffa04f9fb3>] ? dentry_to_path+0x313/0x510 [sisfim]
 [<ffffffffa020fdf4>] ? ext4_dirty_inode+0x54/0x60 [ext4]
 [<ffffffff8120b61a>] ? __mark_inode_dirty+0xca/0x290
 [<ffffffffa020f8ac>] ? ext4_setattr+0x1cc/0x6c0 [ext4]
 [<ffffffffa04fb66b>] ? hook_setattr+0x4b/0xb0 [sisfim]
 [<ffffffffa04fd59b>] ? hook_ext4_file_setattr+0x1b/0x20 [sisfim]
 [<ffffffff811fb6a9>] ? notify_change+0x279/0x3d0
 [<ffffffff811dc793>] ? do_truncate+0x73/0xc0
 [<ffffffff811e1028>] ? __sb_start_write+0x58/0x110
 [<ffffffff811dcb3c>] ? do_sys_ftruncate.constprop.17+0x11c/0x180
 [<ffffffff811dcbde>] ? SyS_ftruncate+0xe/0x10
 [<ffffffff81645e89>] ? system_call_fastpath+0x16/0x1b
..