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avcodec/interplayvideo: check that video_size is >0

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Fixes #6498.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-06-28 16:59:59 +02:00
parent 3426832ac3
commit 42f516b5d3
1 changed files with 2 additions and 0 deletions
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2
libavcodec/interplayvideo.c
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@ -1233,6 +1233,8 @@ static int ipvideo_decode_frame(AVCodecContext *avctx,
s->decoding_map_size = ((s->avctx->width / 8) * (s->avctx->height / 8)) * 2;
s->decoding_map = buf + 8 + 14; /* 14 bits of op data */
video_data_size -= s->decoding_map_size + 14;
if (video_data_size <= 0)
return AVERROR_INVALIDDATA;
if (buf_size < 8 + s->decoding_map_size + 14 + video_data_size)
return AVERROR_INVALIDDATA;