Kernel panic at rfs_info_put()

Issue

• Kernel panic with following call traces.

kernel BUG at /opt/kaspersky/kav4fs/src/kernel/redirfs/rfs_inode.c:117!
...

OR

kernel BUG at /opt/kaspersky/kav4fs/src/kernel/redirfs/rfs_info.c:84!
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/cpu11/cache/index2/shared_cpu_map
CPU 3 
Modules linked in: ipmi_si mpt2sas scsi_transport_sas raid_class mptctl mptbase ipmi_devintf ipmi_msghandler kav4fs_oas(U) redirfs(U) nfp(U) autofs4 sunrpc ipv6 dm_mirror dm_region_hash dm_log uinput wmi power_meter hwmon sg ses enclosure dcdbas microcode serio_raw shpchp bnx2 ghes hed iTCO_wdt iTCO_vendor_support i7core_edac edac_core ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix megaraid_sas dm_mod [last unloaded: dell_rbu]

Modules linked in: ipmi_si mpt2sas scsi_transport_sas raid_class mptctl mptbase ipmi_devintf ipmi_msghandler kav4fs_oas(U) redirfs(U) nfp(U) autofs4 sunrpc ipv6 dm_mirror dm_region_hash dm_log uinput wmi power_meter hwmon sg ses enclosure dcdbas microcode serio_raw shpchp bnx2 ghes hed iTCO_wdt iTCO_vendor_support i7core_edac edac_core ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix megaraid_sas dm_mod [last unloaded: dell_rbu]
Pid: 11066, comm: java Not tainted 2.6.32-131.0.15.el6.x86_64 #1 PowerEdge R610
RIP: 0010:[<ffffffffa02389fa>]  [<ffffffffa02389fa>] rfs_info_put+0x5a/0x60 [redirfs]
RSP: 0000:ffff8801bd659818  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880224ee9da0 RCX: ffffffffa00e6640
RDX: ffffffffa00b7d60 RSI: ffff8801096f9d90 RDI: ffff880224ee9da0
RBP: ffff8801bd659828 R08: ffff88017da82110 R09: dead000000200200
R10: 0000000000020000 R11: 0000000000000012 R12: 0000000000000000
R13: ffff88022270f9c0 R14: ffff880141ee3cc0 R15: ffff8801bd659878
FS:  00007f77240e5700(0000) GS:ffff88002f860000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000747203700 CR3: 0000000127449000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process java (pid: 11066, threadinfo ffff8801bd658000, task ffff88022320cac0)
Stack:
 ffff8801bd659848 ffff8801f4934658 ffff8801bd659848 ffffffffa023b763
<0> 0000000000000000 ffff8801f4934658 ffff8801bd659868 ffffffffa023cd90
<0> ffff8801bd6598a8 ffff8801096f9d90 ffff8801bd6598f8 ffffffffa023a7a1
Call Trace:
 [<ffffffffa023b763>] rfs_inode_put+0x43/0x70 [redirfs]
 [<ffffffffa023cd90>] rfs_dcache_rinode_del+0x80/0x90 [redirfs]
 [<ffffffffa023a7a1>] rfs_d_iput+0xf1/0x1c0 [redirfs]
 [<ffffffff81188e6c>] dentry_iput+0x7c/0x100
 [<ffffffff81188fe1>] d_kill+0x31/0x60
 [<ffffffff81189376>] __shrink_dcache_sb+0x366/0x3c0
 [<ffffffff811894e9>] shrink_dcache_memory+0x119/0x1e0
 [<ffffffff81125ada>] shrink_slab+0x13a/0x1a0
 [<ffffffff81127dc6>] do_try_to_free_pages+0x2d6/0x500
 [<ffffffff811281df>] try_to_free_pages+0x9f/0x130
 [<ffffffff814db337>] ? thread_return+0x4e/0x777
 [<ffffffff811292e0>] ? isolate_pages_global+0x0/0x380
 [<ffffffff8111fedd>] __alloc_pages_nodemask+0x40d/0x8b0
 [<ffffffff81050be3>] ? enqueue_task_fair+0x43/0x90
 [<ffffffff8115474a>] alloc_pages_vma+0x9a/0x150
 [<ffffffff8116d2ee>] do_huge_pmd_anonymous_page+0x13e/0x350
 [<ffffffff8113836a>] handle_mm_fault+0x24a/0x2a0
 [<ffffffff810a2662>] ? do_futex+0x682/0xb00
 [<ffffffff81041529>] __do_page_fault+0x139/0x480
 [<ffffffff8105f77c>] ? pick_next_task_fair+0xec/0x120
 [<ffffffff8100bd4e>] ? invalidate_interrupt4+0xe/0x20
 [<ffffffff814e0c3e>] do_page_fault+0x3e/0xa0
 [<ffffffff814ddfe5>] page_fault+0x25/0x30
Code: 74 22 48 8b 3f e8 47 4e 00 00 48 8b 7b 08 e8 5e 56 00 00 48 8b 7b 10 e8 b5 f6 ff ff 48 89 df e8 bd 33 f2 e0 48 83 c4 08 5b c9 c3 <0f> 0b eb fe 66 90 55 48 89 e5 48 83 ec 40 48 89 5d d8 4c 89 65 
RIP  [<ffffffffa02389fa>] rfs_info_put+0x5a/0x60 [redirfs]
 RSP <ffff8801bd659818>