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| author | Michael Niedermayer <michael@niedermayer.cc> | 2016-09-28 16:14:08 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-09-28 16:46:24 +0200 |
| commit | 2679ad4773aa356e7c3da5c68bc81f02a194617f (patch) | |
| tree | 56c7e3f2164df097f9ad0a8ef38b6b5d48e67554 /libavformat/avidec.c | |
| parent | 14bac7e00d72eac687612d9b125e585011a56d4f (diff) | |
| download | ffmpeg-streaming-2679ad4773aa356e7c3da5c68bc81f02a194617f.zip ffmpeg-streaming-2679ad4773aa356e7c3da5c68bc81f02a194617f.tar.gz | |
avformat/avidec: Check nb_streams in read_gab2_sub()
Fixes null pointer dereference
Fixes: 1/null_point.avi
Found-by: 连一汉 <lianyihan@360.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat/avidec.c')
| -rw-r--r-- | libavformat/avidec.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; |
