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asv1: Verify the amount of extradata

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The init function reads one byte of extradata.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit f50803354c6acb4575379d7c54ca48ec5d36dd61)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Martin Storsjö 2013-09-19 15:14:56 +03:00 committed by Luca Barbato
parent 75dabbff8b
commit 036136fa89
1 changed files with 5 additions and 0 deletions
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5
libavcodec/asv1.c
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@ -535,6 +535,11 @@ static av_cold int decode_init(AVCodecContext *avctx){
int i;
const int scale= avctx->codec_id == CODEC_ID_ASV1 ? 1 : 2;
if (avctx->extradata_size < 1) {
av_log(avctx, AV_LOG_ERROR, "No extradata provided\n");
return AVERROR_INVALIDDATA;
}
common_init(avctx);
init_vlcs(a);
ff_init_scantable(a->dsp.idct_permutation, &a->scantable, scantab);