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mpegaudiodec: Validate that the number of channels fits at the given offset

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This is similar to the fix in 35cbc98b.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-09-19 15:32:02 +03:00
parent f50803354c
commit e9d61de96c
1 changed files with 2 additions and 1 deletions
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3
libavcodec/mpegaudiodec.c
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@ -1939,7 +1939,8 @@ static int decode_frame_mp3on4(AVCodecContext *avctx, void *data,
avpriv_mpegaudio_decode_header((MPADecodeHeader *)m, header);
if (ch + m->nb_channels > avctx->channels) {
if (ch + m->nb_channels > avctx->channels ||
s->coff[fr] + m->nb_channels > avctx->channels) {
av_log(avctx, AV_LOG_ERROR, "frame channel count exceeds codec "
"channel count\n");
return AVERROR_INVALIDDATA;