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avcodec/on2avc: Check number of channels 

Fixes out of array access
Fixes: asan_heap-oob_4da4f3_7_asan_heap-oob_4da4f3_173_Xmen_avc_500.vp6

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-10-04 22:15:07 +02:00
parent 578da1f0dd
commit 550f3e9df3
1 changed files with 5 additions and 0 deletions
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5
libavcodec/on2avc.c
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@ -908,6 +908,11 @@ static av_cold int on2avc_decode_init(AVCodecContext *avctx)
On2AVCContext *c = avctx->priv_data;
int i;
if (avctx->channels > 2U) {
avpriv_request_sample(avctx, "Decoding more than 2 channels");
return AVERROR_PATCHWELCOME;
}
c->avctx = avctx;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO