tree 649a698e2fd30d766dd5f465f36f961c3292cb5e
parent 9fc2b4b436cff7d8403034676014f1be9d534942
author Paul Moore <pmoore@redhat.com> 1436466036 -0400
committer Paul Moore <pmoore@redhat.com> 1436466036 -0400

selinux: don't waste ebitmap space when importing NetLabel categories

At present we don't create efficient ebitmaps when importing NetLabel
category bitmaps.  This can present a problem when comparing ebitmaps
since ebitmap_cmp() is very strict about these things and considers
these wasteful ebitmaps not equal when compared to their more
efficient counterparts, even if their values are the same.  This isn't
likely to cause problems on 64-bit systems due to a bit of luck on
how NetLabel/CIPSO works and the default ebitmap size, but it can be
a problem on 32-bit systems.

This patch fixes this problem by being a bit more intelligent when
importing NetLabel category bitmaps by skipping over empty sections
which should result in a nice, efficient ebitmap.

Cc: stable@vger.kernel.org # 3.17
Signed-off-by: Paul Moore <pmoore@redhat.com>