[FFmpeg-cvslog] uavformat/rsd: check for EOF in extradata

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Fri Oct 23 18:01:11 2020 +0200| [7186ec88b98bc589f1403985ab10cc7f77461ec8] | committer: Michael Niedermayer

uavformat/rsd: check for EOF in extradata

Fixes: OOM
Fixes: 26503/clusterfuzz-testcase-minimized-ffmpeg_dem_RSD_fuzzer-6530816735444992

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=7186ec88b98bc589f1403985ab10cc7f77461ec8
---

 libavformat/rsd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/rsd.c b/libavformat/rsd.c
index ee0b9557de..9785a55726 100644
--- a/libavformat/rsd.c
+++ b/libavformat/rsd.c
@@ -131,6 +131,8 @@ static int rsd_read_header(AVFormatContext *s)
             return ret;
 
         for (i = 0; i < par->channels; i++) {
+            if (avio_feof(pb))
+                return AVERROR_EOF;
             avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
             avio_skip(s->pb, 8);
         }