various security fixes


git-svn-id: svn://svn.debian.org/svn/kernel/dists/squeeze-security/linux-2.6@21392 510b9475-24dd-0310-9b6c-e0eefe99d49f
fix patch


git-svn-id: svn://svn.debian.org/svn/kernel/dists/squeeze-security/linux-2.6@21406 510b9475-24dd-0310-9b6c-e0eefe99d49f
Merge debian-svn branch 'trunk', version 2.6.32-48squeeze7, into stable branch