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avcodec/scpr: improve check for out of range motion vectors 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-02-23 19:45:12 +01:00
parent 95a5af446b
commit 45ed942e7e
1 changed files with 2 additions and 1 deletions
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3
libavcodec/scpr.c
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@ -504,7 +504,8 @@ static int decompress_p(AVCodecContext *avctx,
mvx -= 256;
mvy -= 256;
if (by + mvy + sy1 < 0 || bx + mvx + sx1 < 0)
if (by + mvy + sy1 < 0 || bx + mvx + sx1 < 0 ||
by + mvy + sy1 >= avctx->height || bx + mvx + sx1 >= avctx->width)
return AVERROR_INVALIDDATA;
for (i = 0; i < sy2 - sy1 && (by + sy1 + i) < avctx->height; i++) {