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Code Issues Releases Activity

avcodec/h264addpx_template: Fixes integer overflows

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Fixes: signed integer overflow: 512 + 2147483491 cannot be represented in type 'int'
Fixes: 4780/clusterfuzz-testcase-minimized-4709066174627840

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d6945aeee4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-07 03:48:43 +01:00
parent bf7715fd29
commit 014ba5c737
1 changed files with 12 additions and 12 deletions
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24
libavcodec/h264addpx_template.c
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@ -35,10 +35,10 @@ static void FUNCC(ff_h264_add_pixels4)(uint8_t *_dst, int16_t *_src, int stride)
stride /= sizeof(pixel);
for (i = 0; i < 4; i++) {
dst[0] += src[0];
dst[1] += src[1];
dst[2] += src[2];
dst[3] += src[3];
dst[0] += (unsigned)src[0];
dst[1] += (unsigned)src[1];
dst[2] += (unsigned)src[2];
dst[3] += (unsigned)src[3];
dst += stride;
src += 4;
@ -55,14 +55,14 @@ static void FUNCC(ff_h264_add_pixels8)(uint8_t *_dst, int16_t *_src, int stride)
stride /= sizeof(pixel);
for (i = 0; i < 8; i++) {
dst[0] += src[0];
dst[1] += src[1];
dst[2] += src[2];
dst[3] += src[3];
dst[4] += src[4];
dst[5] += src[5];
dst[6] += src[6];
dst[7] += src[7];
dst[0] += (unsigned)src[0];
dst[1] += (unsigned)src[1];
dst[2] += (unsigned)src[2];
dst[3] += (unsigned)src[3];
dst[4] += (unsigned)src[4];
dst[5] += (unsigned)src[5];
dst[6] += (unsigned)src[6];
dst[7] += (unsigned)src[7];
dst += stride;
src += 8;