ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Wed Sep 28 16:14:08 2016 +0200| [2679ad4773aa356e7c3da5c68bc81f02a194617f] | committer: Michael Niedermayer
avformat/avidec: Check nb_streams in read_gab2_sub() Fixes null pointer dereference Fixes: 1/null_point.avi Found-by: 连一汉 <lianyi...@360.cn> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2679ad4773aa356e7c3da5c68bc81f02a194617f --- libavformat/avidec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/avidec.c b/libavformat/avidec.c index 96edfa8..2c81267 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -1101,6 +1101,8 @@ static int read_gab2_sub(AVFormatContext *s, AVStream *st, AVPacket *pkt) goto error; if (!avformat_open_input(&ast->sub_ctx, "", sub_demuxer, NULL)) { + if (ast->sub_ctx->nb_streams != 1) + goto error; ff_read_packet(ast->sub_ctx, &ast->sub_pkt); avcodec_parameters_copy(st->codecpar, ast->sub_ctx->streams[0]->codecpar); time_base = ast->sub_ctx->streams[0]->time_base; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
