linux

AppArmor: file enforcement routines AppArmor does files enforcement via pathname matching. Matching is done at file open using a dfa match engine. Permission is against the final file object not parent directories, ie. the traversal of directories as part of the file match is implicitly allowed. In the case of nonexistant files (creation) permissions are checked against the target file not the directory. eg. In case of creating the file /dir/new, permissions are checked against the match /dir/new not against /dir/. The permissions for matches are currently stored in the dfa accept table, but this will change to allow for dfa reuse and also to allow for sharing of wider accept states. Signed-off-by: John Johansen <john.johansen@canonical.com> Signed-off-by: James Morris <jmorris@namei.org> 2010-07-29 14:48:04 -07:00