ffmpeg | branch: master | Andreas Cadhalpun <andreas.cadhal...@googlemail.com> | Wed Jun 10 00:12:38 2015 +0200| [a2d1922bde8db2cdac95051918fe81ae18c0376b] | committer: Luca Barbato
takdec: ensure chan2 is a valid channel index If chan2 is not smaller than the number of channels, it can cause segmentation faults due to dereferencing a NULL pointer. Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> Signed-off-by: Luca Barbato <lu_z...@gentoo.org> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a2d1922bde8db2cdac95051918fe81ae18c0376b --- libavcodec/takdec.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libavcodec/takdec.c b/libavcodec/takdec.c index c84cca4..93098be 100644 --- a/libavcodec/takdec.c +++ b/libavcodec/takdec.c @@ -806,6 +806,12 @@ static int tak_decode_frame(AVCodecContext *avctx, void *data, if (s->mcdparams[i].present) { s->mcdparams[i].index = get_bits(gb, 2); s->mcdparams[i].chan2 = get_bits(gb, 4); + if (s->mcdparams[i].chan2 >= avctx->channels) { + av_log(avctx, AV_LOG_ERROR, + "invalid channel 2 (%d) for %d channel(s)\n", + s->mcdparams[i].chan2, avctx->channels); + return AVERROR_INVALIDDATA; + } if (s->mcdparams[i].index == 1) { if ((nbit == s->mcdparams[i].chan2) || (ch_mask & 1 << s->mcdparams[i].chan2)) _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog