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avcodec/mobiclip: Check mv against INT_MAX

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Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 27369/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOBICLIP_fuzzer-5083469356728320

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 2020-11-14 22:27:00 +01:00
parent a207df2acb
commit a108a4d809
1 changed files with 2 additions and 0 deletions
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libavcodec/mobiclip.c
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@ -1146,6 +1146,8 @@ static int predict_motion(AVCodecContext *avctx,
mv.x = mv.x + get_se_golomb(gb); mv.x = mv.x + get_se_golomb(gb);
mv.y = mv.y + get_se_golomb(gb); mv.y = mv.y + get_se_golomb(gb);
} }
if (mv.x >= INT_MAX || mv.y >= INT_MAX)
return AVERROR_INVALIDDATA;
motion[offsetm].x = mv.x; motion[offsetm].x = mv.x;
motion[offsetm].y = mv.y; motion[offsetm].y = mv.y;