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pack-bitmap: fix memory leak if load_bitmap_entries_v1 failed

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In pack-bitmap.c:load_bitmap_entries_v1, the function `read_bitmap_1`
allocates a bitmap and reads index data into it. However, if any of
the validation checks following the allocation fail, the allocated bitmap
is not freed, resulting in a memory leak. To avoid this, the validation
checks should be performed before the bitmap is allocated.

Signed-off-by: Lidong Yan <502024330056@smail.nju.edu.cn>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Lidong Yan
2025-05-12 12:22:10 +00:00
committed by Junio C Hamano
parent 7a1d2bd0a5
commit 7291c2be6a
1 changed files with 4 additions and 4 deletions
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8
pack-bitmap.c
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@@ -388,10 +388,6 @@ static int load_bitmap_entries_v1(struct bitmap_index *index)
return error(_("corrupt ewah bitmap: commit index %u out of range"),
(unsigned)commit_idx_pos);
bitmap = read_bitmap_1(index);
if (!bitmap)
return -1;
if (xor_offset > MAX_XOR_OFFSET || xor_offset > i)
return error(_("corrupted bitmap pack index"));
@@ -402,6 +398,10 @@ static int load_bitmap_entries_v1(struct bitmap_index *index)
return error(_("invalid XOR offset in bitmap pack index"));
}
bitmap = read_bitmap_1(index);
if (!bitmap)
return -1;
recent_bitmaps[i % MAX_XOR_OFFSET] = store_bitmap(
index, bitmap, &oid, xor_bitmap, flags);
}