[FFmpeg-cvslog] avformat/mov: Disallow FTYP after streams
Michael Niedermayer
git at videolan.org
Fri Nov 10 02:29:58 EET 2023
ffmpeg | branch: release/6.0 | Michael Niedermayer <michael at niedermayer.cc> | Wed Nov 8 01:37:11 2023 +0100| [dcaadb2a10ab61841f50f74e9ed5d5c0dcb640ed] | committer: Michael Niedermayer
avformat/mov: Disallow FTYP after streams
Fixes: Assertion !c->fc->nb_streams failed at libavformat/mov.c:7799
Fixes: 63875/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5479178702815232
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 19fcf4313148e86aa47d81a8d5d5e8d056f1f906)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dcaadb2a10ab61841f50f74e9ed5d5c0dcb640ed
---
libavformat/mov.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 804ea9db46..3aea3e6093 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1131,6 +1131,8 @@ static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom)
int ret = ffio_read_size(pb, type, 4);
if (ret < 0)
return ret;
+ if (c->fc->nb_streams)
+ return AVERROR_INVALIDDATA;
if (strcmp(type, "qt "))
c->isom = 1;
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