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xwma: Validate channels and bits_per_coded_sample.

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This prevents a SIGFPE later on.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Alex Converse 2012-03-21 10:58:07 -07:00
parent 86f2ae06b9
commit 5023b89bba
1 changed files with 11 additions and 0 deletions
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11
libavformat/xwma.c
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@ -115,6 +115,17 @@ static int xwma_read_header(AVFormatContext *s)
}
}
if (!st->codec->channels) {
av_log(s, AV_LOG_WARNING, "Invalid channel count: %d\n",
st->codec->channels);
return AVERROR_INVALIDDATA;
}
if (!st->codec->bits_per_coded_sample) {
av_log(s, AV_LOG_WARNING, "Invalid bits_per_coded_sample: %d\n",
st->codec->bits_per_coded_sample);
return AVERROR_INVALIDDATA;
}
/* set the sample rate */
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);