The (1) hugetlb_vmtruncate_list and (2) hugetlb_vmtruncate functions in fs/hugetlbfs/inode.c in the Linux kernel before 2.6.19-rc4 perform certain prio_tree calculations using HPAGE_SIZE instead of PAGE_SIZE units, which allows local users to cause a denial of service (panic) via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10451
https://exchange.xforce.ibmcloud.com/vulnerabilities/36925
http://www.ubuntu.com/usn/usn-578-1
http://www.ubuntu.com/usn/usn-558-1
http://www.securityfocus.com/bid/25904
http://www.redhat.com/support/errata/RHSA-2007-0940.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:105
http://www.mandriva.com/security/advisories?name=MDVSA-2008:008
http://www.mandriva.com/security/advisories?name=MDKSA-2007:216
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.19-rc4
http://www.debian.org/security/2008/dsa-1504
http://www.debian.org/security/2007/dsa-1381
http://secunia.com/advisories/29058
http://secunia.com/advisories/28971
http://secunia.com/advisories/28170