ldb-dn: don't crash on NULL in ldb_binary_encode_string()

Thanks to Nadya for finding this one!

diff --git a/source4/lib/ldb/common/ldb_parse.c b/source4/lib/ldb/common/ldb_parse.c
index 746002e34a7948d727a552f3f6f22bb117309a54..0203f3299f467ce7288e1d9fafb391d4ed395363 100644 (file)
--- a/source4/lib/ldb/common/ldb_parse.c
+++ b/source4/lib/ldb/common/ldb_parse.c
@@ -154,6 +154,9 @@ char *ldb_binary_encode(TALLOC_CTX *mem_ctx, struct ldb_val val)
 char *ldb_binary_encode_string(TALLOC_CTX *mem_ctx, const char *string)
 {
        struct ldb_val val;
+       if (string == NULL) {
+               return NULL;
+       }
        val.data = discard_const_p(uint8_t, string);
        val.length = strlen(string);
        return ldb_binary_encode(mem_ctx, val);