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[FFmpeg-devel,1/4] avformat/mov: Disallow duplicate smdm

Message ID 20211203171956.12231-1-michael@niedermayer.cc
State Accepted
Commit b5ba74053c1ef9f38d9e7b3a036675f06d2b2714
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Series [FFmpeg-devel,1/4] avformat/mov: Disallow duplicate smdm
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Commit Message

Michael Niedermayer Dec. 3, 2021, 5:19 p.m. UTC
Fixes: memleak
Fixes: 39879/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5327819907923968

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/mov.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Michael Niedermayer Dec. 6, 2021, 1:22 p.m. UTC | #1
On Fri, Dec 03, 2021 at 06:19:53PM +0100, Michael Niedermayer wrote:
> Fixes: memleak
> Fixes: 39879/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5327819907923968
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
> ---
>  libavformat/mov.c | 3 +++
>  1 file changed, 3 insertions(+)

will apply

[...]
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Patch

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 5c74d099dae..e34453432d3 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -5405,6 +5405,9 @@  static int mov_read_smdm(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         av_log(c->fc, AV_LOG_WARNING, "Unsupported Mastering Display Metadata box version %d\n", version);
         return 0;
     }
+    if (sc->mastering)
+        return AVERROR_INVALIDDATA;
+
     avio_skip(pb, 3); /* flags */
 
     sc->mastering = av_mastering_display_metadata_alloc();