Use ldb_dn_from_ldb_val to avoid possible over-run of the value.

The ldb_val is length-limited, and while normally NULL terminated,
this avoids the chance that this particular value might not be, as
well as avoiding a cast.

Andrew Bartlett

7 files changed, 20 insertions, 20 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/linked_attributes.c b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
index bafd7e5ecf..a54a7d6472 100644
--- a/source4/dsdb/samdb/ldb_modules/linked_attributes.c
+++ b/source4/dsdb/samdb/ldb_modules/linked_attributes.c
@@ -79,13 +79,13 @@ static struct la_context *linked_attributes_init(struct ldb_module *module,
 /* Common routine to handle reading the attributes and creating a
  * series of modify requests */
 static int la_store_op(struct la_context *ac,
-			enum la_op op, char *dn,
+		       enum la_op op, struct ldb_val *dn,
 			const char *name, const char *value)
 {
 	struct la_op_store *os, *tmp;
 	struct ldb_dn *op_dn;
 
-	op_dn = ldb_dn_new(ac, ac->module->ldb, dn);
+	op_dn = ldb_dn_from_ldb_val(ac, ac->module->ldb, dn);
 	if (!op_dn) {
 		return LDB_ERR_OPERATIONS_ERROR;
 	}
@@ -233,7 +233,7 @@ static int linked_attributes_add(struct ldb_module *module, struct ldb_request *
 
 		for (j = 0; j < el->num_values; j++) {
 			ret = la_store_op(ac, LA_OP_ADD,
-					  (char *)el->values[j].data,
+					  &el->values[j],
 					  attr_name, attr_val);
 			if (ret != LDB_SUCCESS) {
 				return ret;
@@ -327,7 +327,7 @@ static int la_mod_search_callback(struct ldb_request *req, struct ldb_reply *are
 			/* make sure we manage each value */
 			for (j = 0; j < search_el->num_values; j++) {
 				ret = la_store_op(ac, LA_OP_DEL,
-					  (char *)search_el->values[j].data,
+						  &search_el->values[j],
 						  attr_name, dn);
 				if (ret != LDB_SUCCESS) {
 					talloc_free(ares);
@@ -445,7 +445,7 @@ static int linked_attributes_modify(struct ldb_module *module, struct ldb_reques
 			/* For each value being added, we need to setup the adds */
 			for (j = 0; j < el->num_values; j++) {
 				ret = la_store_op(ac, LA_OP_ADD,
-					  (char *)el->values[j].data,
+						  &el->values[j],
 						  attr_name, attr_val);
 				if (ret != LDB_SUCCESS) {
 					return ret;
@@ -459,7 +459,7 @@ static int linked_attributes_modify(struct ldb_module *module, struct ldb_reques
 				/* For each value being deleted, we need to setup the delete */
 				for (j = 0; j < el->num_values; j++) {
 					ret = la_store_op(ac, LA_OP_DEL,
-						  (char *)el->values[j].data,
+							  &el->values[j],
 							  attr_name, attr_val);
 					if (ret != LDB_SUCCESS) {
 						return ret;
@@ -701,7 +701,7 @@ static int la_op_search_callback(struct ldb_request *req,
 			}
 			for (j = 0; j < el->num_values; j++) {
 				ret = la_store_op(ac, LA_OP_DEL,
-					  (char *)el->values[j].data,
+						  &el->values[j],
 						  attr_name, deldn);
 				if (ret != LDB_SUCCESS) {
 					talloc_free(ares);
@@ -710,7 +710,7 @@ static int la_op_search_callback(struct ldb_request *req,
 				}
 				if (!adddn) continue;
 				ret = la_store_op(ac, LA_OP_ADD,
-					  (char *)el->values[j].data,
+						  &el->values[j],
 						  attr_name, adddn);
 				if (ret != LDB_SUCCESS) {
 					talloc_free(ares);
diff --git a/source4/dsdb/samdb/ldb_modules/normalise.c b/source4/dsdb/samdb/ldb_modules/normalise.c
index 70513bd644..2366bc7856 100644
--- a/source4/dsdb/samdb/ldb_modules/normalise.c
+++ b/source4/dsdb/samdb/ldb_modules/normalise.c
@@ -120,7 +120,7 @@ static int normalize_search_callback(struct ldb_request *req, struct ldb_reply *
 			}
 			for (j = 0; j < msg->elements[i].num_values; j++) {
 				const char *dn_str;
-				struct ldb_dn *dn = ldb_dn_new(ac, ac->module->ldb, (const char *)msg->elements[i].values[j].data);
+				struct ldb_dn *dn = ldb_dn_from_ldb_val(ac, ac->module->ldb, &msg->elements[i].values[j]);
 				if (!dn) {
 					return ldb_module_done(ac->req, NULL, NULL, LDB_ERR_OPERATIONS_ERROR);
 				}
diff --git a/source4/lib/ldb/common/attrib_handlers.c b/source4/lib/ldb/common/attrib_handlers.c
index fb57e2dadc..5ec86b5b8f 100644
--- a/source4/lib/ldb/common/attrib_handlers.c
+++ b/source4/lib/ldb/common/attrib_handlers.c
@@ -240,7 +240,7 @@ int ldb_canonicalise_dn(struct ldb_context *ldb, void *mem_ctx,
 	out->length = 0;
 	out->data = NULL;
 
-	dn = ldb_dn_new(ldb, mem_ctx, (char *)in->data);
+	dn = ldb_dn_from_ldb_val(ldb, mem_ctx, in);
 	if ( ! ldb_dn_validate(dn)) {
 		return LDB_ERR_INVALID_DN_SYNTAX;
 	}
@@ -268,10 +268,10 @@ int ldb_comparison_dn(struct ldb_context *ldb, void *mem_ctx,
 	struct ldb_dn *dn1 = NULL, *dn2 = NULL;
 	int ret;
 
-	dn1 = ldb_dn_new(ldb, mem_ctx, (char *)v1->data);
+	dn1 = ldb_dn_from_ldb_val(ldb, mem_ctx, v1);
 	if ( ! ldb_dn_validate(dn1)) return -1;
 
-	dn2 = ldb_dn_new(ldb, mem_ctx, (char *)v2->data);
+	dn2 = ldb_dn_from_ldb_val(ldb, mem_ctx, v2);
 	if ( ! ldb_dn_validate(dn2)) {
 		talloc_free(dn1);
 		return -1;
diff --git a/source4/lib/ldb/common/ldb_ldif.c b/source4/lib/ldb/common/ldb_ldif.c
index fb93e17c6c..538ff8feaa 100644
--- a/source4/lib/ldb/common/ldb_ldif.c
+++ b/source4/lib/ldb/common/ldb_ldif.c
@@ -562,11 +562,11 @@ struct ldb_ldif *ldb_ldif_read(struct ldb_context *ldb,
 		goto failed;
 	}
 
-	msg->dn = ldb_dn_new(msg, ldb, (char *)value.data);
+	msg->dn = ldb_dn_from_ldb_val(msg, ldb, &value);
 
 	if ( ! ldb_dn_validate(msg->dn)) {
 		ldb_debug(ldb, LDB_DEBUG_ERROR, "Error: Unable to parse dn '%s'\n", 
-				  value.data);
+			  (char *)value.data);
 		goto failed;
 	}
 
diff --git a/source4/lib/ldb/common/ldb_match.c b/source4/lib/ldb/common/ldb_match.c
index 64d0e54761..4cde739d67 100644
--- a/source4/lib/ldb/common/ldb_match.c
+++ b/source4/lib/ldb/common/ldb_match.c
@@ -147,7 +147,7 @@ static int ldb_match_equality(struct ldb_context *ldb,
 	int ret;
 
 	if (ldb_attr_dn(tree->u.equality.attr) == 0) {
-		valuedn = ldb_dn_new(ldb, ldb, (char *)tree->u.equality.value.data);
+		valuedn = ldb_dn_from_ldb_val(ldb, ldb, &tree->u.equality.value);
 		if (valuedn == NULL) {
 			return 0;
 		}
diff --git a/source4/lib/ldb/ldb_map/ldb_map.c b/source4/lib/ldb/ldb_map/ldb_map.c
index fafbb63b0a..72d8378a07 100644
--- a/source4/lib/ldb/ldb_map/ldb_map.c
+++ b/source4/lib/ldb/ldb_map/ldb_map.c
@@ -626,7 +626,7 @@ static struct ldb_val ldb_dn_convert_local(struct ldb_module *module, void *mem_
 	struct ldb_dn *dn, *newdn;
 	struct ldb_val newval;
 
-	dn = ldb_dn_new(mem_ctx, module->ldb, (char *)val->data);
+	dn = ldb_dn_from_ldb_val(mem_ctx, module->ldb, val);
 	if (! ldb_dn_validate(dn)) {
 		newval.length = 0;
 		newval.data = NULL;
@@ -652,7 +652,7 @@ static struct ldb_val ldb_dn_convert_remote(struct ldb_module *module, void *mem
 	struct ldb_dn *dn, *newdn;
 	struct ldb_val newval;
 
-	dn = ldb_dn_new(mem_ctx, module->ldb, (char *)val->data);
+	dn = ldb_dn_from_ldb_val(mem_ctx, module->ldb, val);
 	if (! ldb_dn_validate(dn)) {
 		newval.length = 0;
 		newval.data = NULL;
diff --git a/source4/rpc_server/samr/dcesrv_samr.c b/source4/rpc_server/samr/dcesrv_samr.c
index 22d201e58e..fc2d623160 100644
--- a/source4/rpc_server/samr/dcesrv_samr.c
+++ b/source4/rpc_server/samr/dcesrv_samr.c
@@ -2451,7 +2451,7 @@ static NTSTATUS dcesrv_samr_QueryGroupMember(struct dcesrv_call_state *dce_call,
 			struct ldb_message **res2;
 			const char * const attrs2[2] = { "objectSid", NULL };
 			ret = gendb_search_dn(a_state->sam_ctx, mem_ctx,
-					   ldb_dn_new(mem_ctx, a_state->sam_ctx, (const char *)el->values[i].data),
+					   ldb_dn_from_ldb_val(mem_ctx, a_state->sam_ctx, &el->values[i]),
 					   &res2, attrs2);
 			if (ret != 1)
 				return NT_STATUS_INTERNAL_DB_CORRUPTION;
@@ -2845,8 +2845,8 @@ static NTSTATUS dcesrv_samr_GetMembersInAlias(struct dcesrv_call_state *dce_call
 			struct ldb_message **msgs2;
 			const char * const attrs2[2] = { "objectSid", NULL };
 			ret = gendb_search_dn(a_state->sam_ctx, mem_ctx,
-					   ldb_dn_new(mem_ctx, a_state->sam_ctx, (const char *)el->values[i].data),
-					   &msgs2, attrs2);
+					      ldb_dn_new(mem_ctx, a_state->sam_ctx, &el->values[i]),
+					      &msgs2, attrs2);
 			if (ret != 1)
 				return NT_STATUS_INTERNAL_DB_CORRUPTION;