Kernel panic on bdi_remove_from_list+0x2f

Issue

Kernel Panic on bdi_remove_from_list+0x2f

Pid: 66244, comm: mms Tainted: P           ---------------    2.6.32-358.32.3.el6.x86_64 #1 IBM System x3850 X5 ]-/Node 1, Processor Card
RIP: 0010:[<ffffffff8113c1df>]  [<ffffffff8113c1df>] bdi_remove_from_list+0x2f/0x60
RSP: 0018:ffff886483d9bd78  EFLAGS: 00010296
RAX: dead000000200200 RBX: ffff885886215448 RCX: 0000000000000000
RDX: ffffffff81ac1760 RSI: ffff8861e724aa30 RDI: ffffffff81fb7520
RBP: ffff886483d9bd88 R08: 0000000000000058 R09: 00000000000002af
R10: 0000000000000000 R11: 0000000000000246 R12: ffff886483d9bde8
R13: ffff8858862155b0 R14: ffff88592df7f040 R15: 000000000000000a
FS:  00007ff41c51c700(0000) GS:ffff88026be80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007ff37b3f99c8 CR3: 0000007fc9bcc000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process mms (pid: 66244, threadinfo ffff886483d9a000, task ffff8875efad2ae0)
Stack:
 0000000000000000 ffff885886215448 ffff886483d9bdb8 ffffffff8113c2c1
<d> ffff886483d9bde8 ffff88592df7f000 ffff886483d9bde8 0000000000000000
<d> ffff886483d9bdd8 ffffffff81265c94 ffff88592df7f000 ffff88592df7f000
Call Trace:
 [<ffffffff8113c2c1>] bdi_unregister+0xb1/0x170
 [<ffffffff81265c94>] unlink_gendisk+0x34/0x60
 [<ffffffff811f636c>] del_gendisk+0x9c/0x150
 [<ffffffffa025f2b2>] unregister_device+0x22/0x60 [snumbd26]
 [<ffffffffa0260acf>] snumbdctl_release+0x1ef/0x2b0 [snumbd26]
 [<ffffffff81182b65>] __fput+0xf5/0x210
 [<ffffffff81182ca5>] fput+0x25/0x30
 [<ffffffff8117e0fd>] filp_close+0x5d/0x90
 [<ffffffff8117e1d5>] sys_close+0xa5/0x100
 [<ffffffff8100b072>] system_call_fastpath+0x16/0x1b
Code: 53 48 83 ec 08 0f 1f 44 00 00 48 89 fb 48 c7 c7 20 75 fb 81 e8 53 50 3d 00 48 8b 43 08 48 8b 13 48 c7 c7 20 75 fb 81 48 89 42 08 <48> 89 10 48 b8 00 02 20 00 00 00 ad de 48 89 43 08 e8 fb 50 3d 
RIP  [<ffffffff8113c1df>] bdi_remove_from_list+0x2f/0x60
 RSP <ffff886483d9bd78>