[FFmpeg-cvslog] avformat/isom: Uninit layout in ff_mp4_read_dec_config_descr()

[Michael Niedermayer]

ffmpeg | branch: release/7.0 | Michael Niedermayer <michael at niedermayer.cc> | Mon Apr  1 22:56:02 2024 +0200| [d918d9afe0d4bcc3f149166143132f0d582108dd] | committer: Michael Niedermayer

avformat/isom: Uninit layout in ff_mp4_read_dec_config_descr()

Fixes: memleak
Fixes: 67442/clusterfuzz-testcase-minimized-ffmpeg_dem_CAF_fuzzer-5068813261406208

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: James Almer <jamrial at gmail.com>
(cherry picked from commit d157725cf726adc29385d264eaf79ae430b1f3e5)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d918d9afe0d4bcc3f149166143132f0d582108dd
---

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

diff --git a/libavformat/isom.c b/libavformat/isom.c
index 9fbccd4437..c5930bd4d8 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -359,6 +359,7 @@ int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext
                                                 st->codecpar->extradata_size, 1, fc);
             if (ret < 0)
                 return ret;
+            av_channel_layout_uninit(&st->codecpar->ch_layout);
             st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
             st->codecpar->ch_layout.nb_channels = cfg.channels;
             if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4