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avformat/adxdec: check avctx->channels for invalid values 

This avoids a null pointer dereference of pkt->data.

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 7faa40af98)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Andreas Cadhalpun 2015-02-25 22:55:44 +01:00 committed by Michael Niedermayer
parent b49f8de4ec
commit cd74b344c2
1 changed files with 5 additions and 0 deletions
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5
libavformat/adxdec.c
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@ -41,6 +41,11 @@ static int adx_read_packet(AVFormatContext *s, AVPacket *pkt)
AVCodecContext *avctx = s->streams[0]->codec;
int ret, size;
if (avctx->channels <= 0) {
av_log(s, AV_LOG_ERROR, "invalid number of channels %d\n", avctx->channels);
return AVERROR_INVALIDDATA;
}
size = BLOCK_SIZE * avctx->channels;
pkt->pos = avio_tell(s->pb);