The cleanup_journal_tail function in the Journaling Block Device (JBD) functionality in the Linux kernel 2.6 allows local users to cause a denial of service (assertion error and kernel oops) via an ext3 or ext4 image with an "invalid log first block value."
https://bugzilla.redhat.com/show_bug.cgi?id=753341
http://www.securityfocus.com/bid/50663
http://www.openwall.com/lists/oss-security/2011/11/13/4
http://www.openwall.com/lists/oss-security/2011/11/11/6
http://securitytracker.com/id?1026325
http://secunia.com/advisories/48898
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html