RHEL 6 server crashes due to third party module 'digi RealPort(dgrp)'

Issue

• System getting crashed with the following messages observed in the kernel buffer logs :

[  829.835290] ------------[ cut here ]------------
[  829.835297] WARNING: at lib/list_debug.c:48 list_del+0x6e/0xa0() (Tainted: P           -- ------------   )
[  829.835299] Hardware name: ProLiant DL360 G7
[  829.835300] list_del corruption. prev->next should be ffff880606ba3b50, but was (null)
[..]
[  829.835329] Pid: 30002, comm: drpd Tainted: P           -- ------------    2.6.32-573.41.1.el6.x86_64 #1
[  829.835331] Call Trace:
[  829.835336]  [<ffffffff810775a1>] ? warn_slowpath_common+0x91/0xe0
[  829.835338]  [<ffffffff810776a6>] ? warn_slowpath_fmt+0x46/0x60
[  829.835340]  [<ffffffff812a41de>] ? list_del+0x6e/0xa0
[  829.835343]  [<ffffffff810a19e1>] ? remove_wait_queue+0x31/0x50
[  829.835346]  [<ffffffff811a9ace>] ? free_poll_entry+0x1e/0x30
[  829.835347]  [<ffffffff811a9b1d>] ? poll_freewait+0x3d/0xa0
[  829.835349]  [<ffffffff811aad47>] ? do_select+0x6e7/0x7c0
[  829.835352]  [<ffffffff814ac968>] ? ip_output+0xb8/0xc0
[  829.835354]  [<ffffffff811a9b80>] ? __pollwait+0x0/0xf0
[  829.835356]  [<ffffffff811a9c70>] ? pollwake+0x0/0x60
[  829.835357]  [<ffffffff811a9c70>] ? pollwake+0x0/0x60
[  829.835360]  [<ffffffff8153c90b>] ? _spin_unlock_bh+0x1b/0x20
[  829.835364]  [<ffffffff8145a065>] ? release_sock+0xe5/0x110
[  829.835367]  [<ffffffff814b4a5c>] ? tcp_sendmsg+0x73c/0xa20
[  829.835369]  [<ffffffff81456b73>] ? sock_sendmsg+0x123/0x150
[  829.835371]  [<ffffffff8153925e>] ? thread_return+0x4e/0x7d0
[  829.835374]  [<ffffffff810a15f0>] ? autoremove_wake_function+0x0/0x40
[  829.835376]  [<ffffffff811aafaa>] ? core_sys_select+0x18a/0x2c0
[  829.835378]  [<ffffffff810a774f>] ? up+0x2f/0x50
[  829.835382]  [<ffffffffa06ac676>] ? dgrp_net_read+0x186/0x380 [dgrp]  <<<<----
[  829.835386]  [<ffffffff811fd555>] ? pde_users_dec+0x25/0x60
[  829.835388]  [<ffffffff811fda19>] ? proc_reg_read+0x89/0xc0
[  829.835389]  [<ffffffff811ab337>] ? sys_select+0x47/0x110
[  829.835392]  [<ffffffff81192a81>] ? sys_read+0x51/0xb0
[  829.835395]  [<ffffffff8100b0d2>] ? system_call_fastpath+0x16/0x1b