John Johansen 11c236b89d 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>

2017-01-16 01:18:34 -08:00

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