CVE request: kernel: gfs2: rename cases kernel panic

[Eugene Teo <eugene () redhat com>]

The problem was in the way the gfs2 directory code was trying to re-use
sentinel directory entries. A local, unprivileged user on a gfs2 mounted 
directory can trigger this issue, resulting in a NULL pointer dereference.

https://bugzilla.redhat.com/show_bug.cgi?id=620300

Introduced in upstream commit 71b86f56 (v2.6.19-rc1), and fixed in 
commit 728a756b.

http://git.kernel.org/linus/71b86f562b5eb6f94ea00bba060caa64d0137969
http://git.kernel.org/linus/728a756b8fcd22d80e2dbba8117a8a3aafd3f203

Thanks, Eugene
--
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