[FFmpeg-cvslog] avformat/mov: clear padding area in mov_read_extradata()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Dec 28 03:41:29 2013 +0100| [8efde6d80c94e6069d4fc19e5ef88a2946a2e51c] | committer: Michael Niedermayer

avformat/mov: clear padding area in mov_read_extradata()

Fixes: msan_uninit-mem_7f58816b71e3_7025_mov_svq3___svq3_weird_prediction2.mov
Fixes use of uninitialized memory
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8efde6d80c94e6069d4fc19e5ef88a2946a2e51c
---

 libavformat/mov.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index be602ee..8dc6062 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1010,6 +1010,7 @@ static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
         av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
         st->codec->extradata_size -= atom.size - err;
     }
+    memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
     return 0;
 }