Off-by-one error in the iov_iter_advance function in mm/filemap.c in the Linux kernel before 2.6.27-rc2 allows local users to cause a denial of service (system crash) via a certain sequence of file I/O operations with readv and writev, as demonstrated by testcases/kernel/fs/ftest/ftest03 from the Linux Test Project.
https://exchange.xforce.ibmcloud.com/vulnerabilities/44492
http://www.ubuntu.com/usn/usn-659-1
http://www.securityfocus.com/bid/31132
http://www.redhat.com/support/errata/RHSA-2008-0857.html
http://www.debian.org/security/2008/dsa-1636
http://secunia.com/advisories/32393