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avcodec/vc2enc: Check for non negative slice bounds 

Fixes: invalid shifts
Fixes: Ticket 8221

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f7862e8268)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-05-31 21:40:17 +02:00
parent 97d0d3ae61
commit 68765c25cd
1 changed files with 2 additions and 0 deletions
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2
libavcodec/vc2enc.c
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@ -981,6 +981,8 @@ static av_cold int vc2_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
}
s->slice_min_bytes = s->slice_max_bytes - s->slice_max_bytes*(s->tolerance/100.0f);
if (s->slice_min_bytes < 0)
return AVERROR(EINVAL);
ret = encode_frame(s, avpkt, frame, aux_data, header_size, s->interlaced);
if (ret)