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image-android-sparse: Fix #224: truncated image generated

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When source image file ends with empty (sparse) area, this area is
skipped and incomplete sparse file is generated.

Signed-off-by: Wojciech Nizinski <wojciech.nizinski@grinn-global.com>
This commit is contained in:
Wojciech Nizinski 2023-09-20 11:37:14 +02:00 committed by Michael Olbrich
parent 5c3b0c4bae
commit 4a200b2267
1 changed files with 13 additions and 0 deletions
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13
image-android-sparse.c
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@ -320,6 +320,19 @@ static int android_sparse_generate(struct image *image)
block = extents[extent].end / sparse->block_size;
}
if (block < block_count) {
header.input_chunks++;
chunk_header.chunk_type = SPARSE_DONT_CARE;
chunk_header.blocks = block_count - block;
chunk_header.size = sizeof(chunk_header);
ret = flush_header(image, out_fd, &chunk_header, -1);
if (ret < 0)
return ret;
for (i = 0; i < chunk_header.blocks; ++i)
crc32 = crc32_next(zeros, sparse->block_size, crc32);
}
header.input_chunks++;
chunk_header.chunk_type = SPARSE_CRC32;
chunk_header.blocks = 0;