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on2avc: check number of channels

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Fixes invalid memory access.

CC: libav-stable@libav.org
Bug-ID: CVE-2014-8549
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Michael Niedermayer 2014-10-04 22:15:07 +02:00 committed by Anton Khirnov
parent d423dd72be
commit cee4490b52
1 changed files with 4 additions and 0 deletions
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4
libavcodec/on2avc.c
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@ -918,6 +918,10 @@ static av_cold int on2avc_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "0x500 version should be mono\n");
return AVERROR_INVALIDDATA;
}
if (avctx->channels > 2) {
av_log(avctx, AV_LOG_ERROR, "Only 1 or 2 channels are supported.\n");
return AVERROR(EINVAL);
}
if (avctx->channels == 2)
av_log(avctx, AV_LOG_WARNING,
"Stereo mode support is not good, patch is welcome\n");