tree 591f879c7a4491b17a03391343fc3c0a98bb7165
parent 6604d4c1c1a65d3d1a6a56291d96516d1e9b7041
author John Johansen <john.johansen@canonical.com> 1484556162 -0800
committer John Johansen <john.johansen@canonical.com> 1484558314 -0800

apparmor: add a default null dfa

Instead of testing whether a given dfa exists in every code path, have
a default null dfa that is used when loaded policy doesn't provide a
dfa.

This will let us get rid of special casing and avoid dereference bugs
when special casing is missed.

Signed-off-by: John Johansen <john.johansen@canonical.com>