ldb: Cope with substring match with no chunks in ldb_filter_from_tree

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/lib/ldb/common/ldb_parse.c b/lib/ldb/common/ldb_parse.c
index 33e8444be7d3e11a7cee7f560efbf71bfe83dbfe..5fa5a74afa9d5721d207ab63ebc200347dd27b04 100644 (file)
--- a/lib/ldb/common/ldb_parse.c
+++ b/lib/ldb/common/ldb_parse.c
@@ -748,7 +748,7 @@ char *ldb_filter_from_tree(TALLOC_CTX *mem_ctx, const struct ldb_parse_tree *tre
                ret = talloc_asprintf(mem_ctx, "(%s=%s", tree->u.substring.attr,
                                      tree->u.substring.start_with_wildcard?"*":"");
                if (ret == NULL) return NULL;
-               for (i = 0; tree->u.substring.chunks[i]; i++) {
+               for (i = 0; tree->u.substring.chunks && tree->u.substring.chunks[i]; i++) {
                        s2 = ldb_binary_encode(mem_ctx, *(tree->u.substring.chunks[i]));
                        if (s2 == NULL) {
                                talloc_free(ret);