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rsd: limit number of channels

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Negative values don't make sense and too large values can cause
overflows. For AV_CODEC_ID_ADPCM_THP this leads to a too small extradata
buffer being allocated, causing out-of-bounds writes.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-10-19 23:40:41 +02:00
parent 8bd38ec5bd
commit ee5f0f1d35
1 changed files with 3 additions and 1 deletions
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4
libavformat/rsd.c
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@ -84,8 +84,10 @@ static int rsd_read_header(AVFormatContext *s)
}
par->channels = avio_rl32(pb);
if (!par->channels)
if (par->channels <= 0 || par->channels > INT_MAX / 36) {
av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->channels);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 4); // Bit depth
par->sample_rate = avio_rl32(pb);