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4xmdec: test version for cfrms, fix out of array accesses

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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 2012-11-12 14:56:07 +01:00
parent be818df547
commit c433823750
1 changed files with 5 additions and 0 deletions
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5
libavcodec/4xm.c
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@ -811,6 +811,11 @@ static int decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
if (f->version <= 1) {
av_log(f->avctx, AV_LOG_ERROR, "cfrm in version %d\n", f->version);
return AVERROR_INVALIDDATA;
}
for (i = 0; i < CFRAME_BUFFER_COUNT; i++)
if (f->cfrm[i].id && f->cfrm[i].id < avctx->frame_number)
av_log(f->avctx, AV_LOG_ERROR, "lost c frame %d\n",