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Code Issues Releases Activity

mjpegdec: check SE.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-11 00:01:24 +01:00
parent e56b098410
commit 1f41cffe1e
1 changed files with 5 additions and 0 deletions
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5
libavcodec/mjpegdec.c
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@ -1095,6 +1095,11 @@ static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
int last_scan = 0;
int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
if (se > 63) {
av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
return AVERROR_INVALIDDATA;
}
if (!Al) {
s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
last_scan = !~s->coefs_finished[c];