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avcodec/jpeg2000dec: Check that coords match before applying ICT

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This avoid potential out of array accesses

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-09 00:37:26 +02:00
parent 028c59c17b
commit 12ba1b2b4d
1 changed files with 6 additions and 1 deletions
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7
libavcodec/jpeg2000dec.c
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@ -1148,11 +1148,16 @@ static inline void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
int i, csize = 1; int i, csize = 1;
void *src[3]; void *src[3];
for (i = 1; i < 3; i++) for (i = 1; i < 3; i++) {
if (tile->codsty[0].transform != tile->codsty[i].transform) { if (tile->codsty[0].transform != tile->codsty[i].transform) {
av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n"); av_log(s->avctx, AV_LOG_ERROR, "Transforms mismatch, MCT not supported\n");
return; return;
} }
if (memcmp(tile->comp[0].coord, tile->comp[i].coord, sizeof(tile->comp[0].coord))) {
av_log(s->avctx, AV_LOG_ERROR, "Coords mismatch, MCT not supported\n");
return;
}
}
for (i = 0; i < 3; i++) for (i = 0; i < 3; i++)
if (tile->codsty[0].transform == FF_DWT97) if (tile->codsty[0].transform == FF_DWT97)