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replace 'ptr + y * stride' by 'ptr += stride'

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This is to prevent potential overflow.

Change-Id: I9d21cfe790ba975bd5e117b025ea4d9deaeae4ab
This commit is contained in:
Pascal Massimino
2017-01-04 00:54:23 -08:00
parent 00b08c88c0
commit 259e98286a
4 changed files with 134 additions and 98 deletions
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3
imageio/pngdec.c
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@@ -282,9 +282,10 @@ int ReadPNG(const uint8_t* const data, size_t data_size,
rgb = (uint8_t*)malloc((size_t)stride * height);
if (rgb == NULL) goto Error;
for (p = 0; p < num_passes; ++p) {
png_bytep row = rgb;
for (y = 0; y < height; ++y) {
png_bytep row = (png_bytep)(rgb + y * stride);
png_read_rows(png, &row, NULL, 1);
row += stride;
}
}
png_read_end(png, end_info);