[FFmpeg-cvslog] avformat/cinedec: Fix index_entries size check

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Jan 31 22:42:54 2021 +0100| [09b304035423409ce18d731995fa3b921d54f9b5] | committer: Michael Niedermayer

avformat/cinedec: Fix index_entries size check

Fixes: out of array access
Fixes: 29868/clusterfuzz-testcase-minimized-ffmpeg_dem_CINE_fuzzer-5692001957445632

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=09b304035423409ce18d731995fa3b921d54f9b5
---

 libavformat/cinedec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/cinedec.c b/libavformat/cinedec.c
index c6c0d927ee..e5c6468c39 100644
--- a/libavformat/cinedec.c
+++ b/libavformat/cinedec.c
@@ -288,7 +288,7 @@ static int cine_read_packet(AVFormatContext *avctx, AVPacket *pkt)
     AVIOContext *pb = avctx->pb;
     int n, size, ret;
 
-    if (cine->pts >= st->duration)
+    if (cine->pts >= st->internal->nb_index_entries)
         return AVERROR_EOF;
 
     avio_seek(pb, st->internal->index_entries[cine->pts].pos, SEEK_SET);