Check return from fr_dict_unknown_attr_afrom_num() (CID #1503891) (#4748)

diff --git a/src/protocols/internal/decode.c b/src/protocols/internal/decode.c
index d5fde8448fc3fe5bc2554f77d1fcd64d885d9adf..3cfe403ea6fc289528ebe872811b6fc4aded2a2d 100644 (file)
--- a/src/protocols/internal/decode.c
+++ b/src/protocols/internal/decode.c
@@ -253,6 +253,7 @@ static ssize_t internal_decode_pair(TALLOC_CTX *ctx, fr_pair_list_t *out, fr_dic
        unknown:
                FR_PROTO_TRACE("Unknown attribute %" PRIu64, type);
                da = fr_dict_unknown_attr_afrom_num(ctx, parent_da, type);
+               if (!da) return PAIR_DECODE_FATAL_ERROR;
        } else {
                da = fr_dict_attr_child_by_num(parent_da, type);
                if (!da) {