fs/splice.c in the splice subsystem in the Linux kernel before 2.6.22.2 does not properly handle a failure of the add_to_page_cache_lru function, and subsequently attempts to unlock a page that was not locked, which allows local users to cause a denial of service (kernel BUG and system crash), as demonstrated by the fio I/O tool.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45191
https://bugzilla.redhat.com/show_bug.cgi?id=462434
http://www.openwall.com/lists/oss-security/2008/09/16/10
http://www.debian.org/security/2008/dsa-1653
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00001.html