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jpeg2000dec: Check ncomponents and tile dimensions

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Fixes various problems

Code ported from j2kdec

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-05-21 21:36:32 +02:00
parent 78c7bff04a
commit 069ede2981
1 changed files with 7 additions and 0 deletions
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7
libavcodec/jpeg2000dec.c
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@ -176,6 +176,13 @@ static int get_siz(Jpeg2000DecoderContext *s)
s->tile_offset_y = bytestream_get_be32(&s->buf); // YT0Siz
s->ncomponents = bytestream_get_be16(&s->buf); // CSiz
if(s->ncomponents <= 0 || s->ncomponents > 4) {
av_log(s->avctx, AV_LOG_ERROR, "unsupported/invalid ncomponents: %d\n", s->ncomponents);
return AVERROR(EINVAL);
}
if(s->tile_width<=0 || s->tile_height<=0)
return AVERROR(EINVAL);
if (s->buf_end - s->buf < 2 * s->ncomponents)
return AVERROR(EINVAL);