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avformat/mov: clear padding area in mov_read_extradata()

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Fixes: msan_uninit-mem_7f58816b71e3_7025_mov_svq3___svq3_weird_prediction2.mov
Fixes use of uninitialized memory
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-28 03:41:29 +01:00
parent 4156df59f5
commit 8efde6d80c
1 changed files with 1 additions and 0 deletions
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libavformat/mov.c
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@ -1010,6 +1010,7 @@ static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom,
av_log(c->fc, AV_LOG_WARNING, "truncated extradata\n");
st->codec->extradata_size -= atom.size - err;
}
memset(buf + 8 + err, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
}