[FFmpeg-cvslog] avformat/mov: Check extradata in mov_read_iacb()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Jul 18 18:50:09 2024 +0200| [167bf8f61e671833c9d1234f12973e71c414b621] | committer: Michael Niedermayer

avformat/mov: Check extradata in mov_read_iacb()

Fixes: MemLeak
Fixes: 69853/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-4660448545275904

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=167bf8f61e671833c9d1234f12973e71c414b621
---

 libavformat/mov.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 20efc74f00..a29283effa 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -898,6 +898,11 @@ static int mov_read_iacb(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     st = c->fc->streams[c->fc->nb_streams - 1];
     sc = st->priv_data;
 
+    if (st->codecpar->extradata) {
+        av_log(c->fc, AV_LOG_WARNING, "ignoring iacb\n");
+        return 0;
+    }
+
     sc->iamf = av_mallocz(sizeof(*sc->iamf));
     if (!sc->iamf)
         return AVERROR(ENOMEM);