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avcodec/wcmv: Fix integer overflows

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Fixes: signed integer overflow: 262140 * 65535 cannot be represented in type 'int'
Fixes: 10090/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5691269368512512

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-09-25 02:01:58 +02:00
parent 2076e11839
commit a8a98ba9ee
1 changed files with 4 additions and 0 deletions
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4
libavcodec/wcmv.c
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@ -113,6 +113,8 @@ static int decode_frame(AVCodecContext *avctx,
bytestream2_skip(&bgb, 4);
w = bytestream2_get_le16(&bgb);
h = bytestream2_get_le16(&bgb);
if (x + bpp * (int64_t)w * h > INT_MAX)
return AVERROR_INVALIDDATA;
x += bpp * w * h;
}
@ -140,6 +142,8 @@ static int decode_frame(AVCodecContext *avctx,
bytestream2_skip(&gb, 4);
w = bytestream2_get_le16(&gb);
h = bytestream2_get_le16(&gb);
if (x + bpp * (int64_t)w * h > INT_MAX)
return AVERROR_INVALIDDATA;
x += bpp * w * h;
}