UBUNTU: SAUCE: apparmor: profiles in one ns can affect mediation in another ns

When the ns hierarchy a//foo and b//foo are compared the are
incorrectly identified as being the same as they have the same depth
and the same basename.

Instead make sure to compare the full hname to distinguish this case.

BugLink: http://bugs.launchpad.net/bugs/1615887Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

security/apparmor/label.c

@@ -112,8 +112,8 @@ static int ns_cmp(struct aa_ns *a, struct aa_ns *b)
 
 	AA_BUG(!a);
 	AA_BUG(!b);
-	AA_BUG(!a->base.name);
-	AA_BUG(!b->base.name);
+	AA_BUG(!a->base.hname);
+	AA_BUG(!b->base.hname);
 
 	if (a == b)
 		return 0;
@@ -122,7 +122,7 @@ static int ns_cmp(struct aa_ns *a, struct aa_ns *b)
 	if (res)
 		return res;
 
-	return strcmp(a->base.name, b->base.name);
+	return strcmp(a->base.hname, b->base.hname);
 }
 
 /**