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libsepol: fix neverallow checking on attributes 

Ole Kliemann reported that allow rules written using type attributes were
not being detected by neverallow assertions in the policy.  I think that
this was broken in policy.24 and later due to changes in the type datum.
Fix the expand logic to correctly distinguish type attributes from types.

Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Stephen Smalley 2012-08-30 17:17:37 -04:00 committed by Eric Paris
parent f6b82ec701
commit 4a33c78ca5
1 changed files with 6 additions and 6 deletions
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12
libsepol/src/expand.c
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@ -3106,12 +3106,12 @@ static int expand_avtab_node(avtab_key_t * k, avtab_datum_t * d, void *args)
newkey.target_class = k->target_class;
newkey.specified = k->specified;
if (stype && ttype) {
if (stype->flavor != TYPE_ATTRIB && ttype->flavor != TYPE_ATTRIB) {
/* Both are individual types, no expansion required. */
return expand_avtab_insert(expa, k, d);
}
if (stype) {
if (stype->flavor != TYPE_ATTRIB) {
/* Source is an individual type, target is an attribute. */
newkey.source_type = k->source_type;
ebitmap_for_each_bit(tattr, tnode, j) {
@ -3125,7 +3125,7 @@ static int expand_avtab_node(avtab_key_t * k, avtab_datum_t * d, void *args)
return 0;
}
if (ttype) {
if (ttype->flavor != TYPE_ATTRIB) {
/* Target is an individual type, source is an attribute. */
newkey.target_type = k->target_type;
ebitmap_for_each_bit(sattr, snode, i) {
@ -3236,12 +3236,12 @@ int expand_cond_av_node(policydb_t * p,
newkey.target_class = k->target_class;
newkey.specified = k->specified;
if (stype && ttype) {
if (stype->flavor != TYPE_ATTRIB && ttype->flavor != TYPE_ATTRIB) {
/* Both are individual types, no expansion required. */
return expand_cond_insert(newl, expa, k, d);
}
if (stype) {
if (stype->flavor != TYPE_ATTRIB) {
/* Source is an individual type, target is an attribute. */
newkey.source_type = k->source_type;
ebitmap_for_each_bit(tattr, tnode, j) {
@ -3255,7 +3255,7 @@ int expand_cond_av_node(policydb_t * p,
return 0;
}
if (ttype) {
if (ttype->flavor != TYPE_ATTRIB) {
/* Target is an individual type, source is an attribute. */
newkey.target_type = k->target_type;
ebitmap_for_each_bit(sattr, snode, i) {