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audemux: Add a sanity check for the number of channels

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Fixes a division by 0.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Michael Niedermayer 2012-04-23 10:33:55 +03:00 • committed by Martin Storsjö
parent a229d6c285
commit 0ca4414d0f
1 changed files with 5 additions and 0 deletions
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5
libavformat/au.c
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@ -145,6 +145,11 @@ static int au_read_header(AVFormatContext *s)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }
if (channels == 0 || channels > 64) {
av_log(s, AV_LOG_ERROR, "Invalid number of channels %d\n", channels);
return AVERROR_INVALIDDATA;
}
if (size >= 24) { if (size >= 24) {
/* skip unused data */ /* skip unused data */
avio_skip(pb, size - 24); avio_skip(pb, size - 24);