reftable/reader: handle allocation failures for unindexed reader

Handle allocation failures when creating unindexed readers.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

reftable/reader.c

@@ -734,19 +734,30 @@ static int reftable_reader_refs_for_unindexed(struct reftable_reader *r,
 	REFTABLE_ALLOC_ARRAY(ti, 1);
 	table_iter_init(ti, r);
 	err = table_iter_seek_start(ti, BLOCK_TYPE_REF, 0);
-	if (err < 0) {
-		reftable_free(ti);
-		return err;
-	}
+	if (err < 0)
+		goto out;
 
-	filter = reftable_malloc(sizeof(struct filtering_ref_iterator));
+	filter = reftable_malloc(sizeof(*filter));
+	if (!filter) {
+		err = REFTABLE_OUT_OF_MEMORY_ERROR;
+		goto out;
+	}
 	*filter = empty;
 
 	strbuf_add(&filter->oid, oid, oid_len);
 	iterator_from_table_iter(&filter->it, ti);
 
 	iterator_from_filtering_ref_iterator(it, filter);
-	return 0;
+
+	err = 0;
+
+out:
+	if (err < 0) {
+		if (ti)
+			table_iter_close(ti);
+		reftable_free(ti);
+	}
+	return err;
 }
 
 int reftable_reader_refs_for(struct reftable_reader *r,