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avcodec/libvpxdec: make sure BlockAdditional side data size >= 8

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Signed-off-by: Marton Balint <cus@passwd.hu>
Signed-off-by: James Zern <jzern@google.com>
This commit is contained in:
Marton Balint 2019-10-27 18:10:33 +01:00 committed by James Zern
parent 6b54477072
commit 99e0007046
1 changed files with 1 additions and 1 deletions
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libavcodec/libvpxdec.c
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@ -191,7 +191,7 @@ static int vpx_decode(AVCodecContext *avctx,
side_data = av_packet_get_side_data(avpkt,
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
&side_data_size);
if (side_data_size > 1) {
if (side_data_size >= 8) {
const uint64_t additional_id = AV_RB64(side_data);
side_data += 8;
side_data_size -= 8;