Integer overflow in the btrfs_ioctl_clone function in fs/btrfs/ioctl.c in the Linux kernel before 2.6.35 might allow local users to obtain sensitive information via a BTRFS_IOC_CLONE_RANGE ioctl call.
https://bugzilla.redhat.com/show_bug.cgi?id=616998
http://www.ubuntu.com/usn/USN-1041-1
http://www.securityfocus.com/bid/41854
http://www.openwall.com/lists/oss-security/2010/07/21/4
http://www.openwall.com/lists/oss-security/2010/07/21/10
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html