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imageio_util: add ImgIoUtilCheckSizeArgumentsOverflow

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and use it to validate decoder allocations. fixes a crash in jpegdec at
least.

BUG=webp:312

Change-Id: Ia940590098f29510add6aad10a8dfe9e9ea46bf4
This commit is contained in:
James Zern
2016-10-07 13:18:29 -07:00
parent 68ae5b671f
commit bc86b7a8a1
6 changed files with 55 additions and 13 deletions
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7
imageio/imageio_util.c
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@ -134,3 +134,10 @@ void ImgIoUtilCopyPlane(const uint8_t* src, int src_stride,
}
// -----------------------------------------------------------------------------
int ImgIoUtilCheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) {
const uint64_t total_size = nmemb * size;
return (total_size == (size_t)total_size);
}
// -----------------------------------------------------------------------------