[PATCH V2 5/6] pack-bitmap: fix a memleak

[Stefan Beller <sbeller@google.com>]

`recent_bitmaps` is allocated in the function load_bitmap_entries_v1
and it is not passed into any function, so it's safe to free it before
leaving that function.

Signed-off-by: Stefan Beller <sbeller@google.com>
---

Notes:
    I wonder however if we need to free the actual bitmaps
    stored in the recent_bitmaps as well.

 pack-bitmap.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/pack-bitmap.c b/pack-bitmap.c
index 365f9d9..34823e9 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -213,7 +213,7 @@ static int load_bitmap_entries_v1(struct bitmap_index *index)
 {
 	static const size_t MAX_XOR_OFFSET = 160;
 
-	uint32_t i;
+	uint32_t i, ret = 0;
 	struct stored_bitmap **recent_bitmaps;
 
 	recent_bitmaps = xcalloc(MAX_XOR_OFFSET, sizeof(struct stored_bitmap));
@@ -232,24 +232,31 @@ static int load_bitmap_entries_v1(struct bitmap_index *index)
 		sha1 = nth_packed_object_sha1(index->pack, commit_idx_pos);
 
 		bitmap = read_bitmap_1(index);
-		if (!bitmap)
-			return -1;
+		if (!bitmap) {
+			ret = -1;
+			goto out;
+		}
 
-		if (xor_offset > MAX_XOR_OFFSET || xor_offset > i)
-			return error("Corrupted bitmap pack index");
+		if (xor_offset > MAX_XOR_OFFSET || xor_offset > i) {
+			ret = error("Corrupted bitmap pack index");
+			goto out;
+		}
 
 		if (xor_offset > 0) {
 			xor_bitmap = recent_bitmaps[(i - xor_offset) % MAX_XOR_OFFSET];
 
-			if (xor_bitmap == NULL)
-				return error("Invalid XOR offset in bitmap pack index");
+			if (xor_bitmap == NULL) {
+				ret = error("Invalid XOR offset in bitmap pack index");
+				goto out;
+			}
 		}
 
 		recent_bitmaps[i % MAX_XOR_OFFSET] = store_bitmap(
 			index, bitmap, sha1, xor_bitmap, flags);
 	}
-
-	return 0;
+out:
+	free(recent_bitmaps);
+	return ret;
 }
 
 static char *pack_bitmap_filename(struct packed_git *p)
@@ -986,6 +993,8 @@ void test_bitmap_walk(struct rev_info *revs)
 		fprintf(stderr, "OK!\n");
 	else
 		fprintf(stderr, "Mismatch!\n");
+
+	free(result);
 }
 
 static int rebuild_bitmap(uint32_t *reposition,
-- 
2.3.0.81.gc37f363