s3:registry: add an extra check for dsize==0 to regdb_fetch_keys_internal()

Don't only rely on dptr == NULL.
I stumbled over this one when rewriting some of the dbwrap_ctdb code.

Michael

Signed-off-by: Michael Adam <obnox@samba.org>
(cherry picked from commit b58c7d96528bf3aa781f76b76465699f97e8985c)

diff --git a/source3/registry/reg_backend_db.c b/source3/registry/reg_backend_db.c
index 2cd359353717f4792da54969556ae28167ae0fd7..43963db3c29a26d451b73141f56f73157fd655b6 100644 (file)
--- a/source3/registry/reg_backend_db.c
+++ b/source3/registry/reg_backend_db.c
@@ -1461,7 +1461,7 @@ static WERROR regdb_fetch_keys_internal(struct db_context *db, const char *key,
 
        value = regdb_fetch_key_internal(db, frame, key);
 
-       if (value.dptr == NULL) {
+       if (value.dsize == 0 || value.dptr == NULL) {
                DEBUG(10, ("regdb_fetch_keys: no subkeys found for key [%s]\n",
                           key));
                goto done;