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avformat/mov: Disallow duplicate smdm 

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>
(cherry picked from commit b5ba74053c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-12-03 17:42:22 +01:00
parent 0d8300a960
commit b4392d045e
1 changed files with 3 additions and 0 deletions
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3
libavformat/mov.c
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@ -5345,6 +5345,9 @@ 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();