The reiserfs_copy_from_user_to_file_region function in reiserfs/file.c for Linux kernel 2.6.10 and 2.6.11 before 2.6.11-rc4, when running on 64-bit architectures, may allow local users to trigger a buffer overflow as a result of casting discrepancies between size_t and int data types.
http://www.novell.com/linux/security/advisories/2005_18_kernel.html
http://marc.info/?l=full-disclosure&m=110846727602817&w=2
http://marc.info/?l=bugtraq&m=111091402626556&w=2
http://linux.bkbits.net:8080/linux-2.6/cset%4042018227TkNpHlX6BefnItV_GqMmzQ