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[trunk] fixed a buffer overflow in opj_tcd_init_decode_tile 

Update issue 431
This commit is contained in:
Antonin Descampe 2015-01-15 18:16:29 +00:00
parent 42132ed6b5
commit 5d00b719f4
2 changed files with 9 additions and 8 deletions
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8
src/lib/openjp2/pi.c
View File

@ -708,10 +708,10 @@ void opj_get_all_encoding_parameters( const opj_image_t *p_image,
q = tileno / p_cp->tw;
/* here calculation of tx0, tx1, ty0, ty1, maxprec, l_dx and l_dy */
*p_tx0 = opj_int_max((OPJ_INT32)(p_cp->tx0 + p * p_cp->tdx), (OPJ_INT32)p_image->x0);
*p_tx1 = opj_int_min((OPJ_INT32)(p_cp->tx0 + (p + 1) * p_cp->tdx), (OPJ_INT32)p_image->x1);
*p_ty0 = opj_int_max((OPJ_INT32)(p_cp->ty0 + q * p_cp->tdy), (OPJ_INT32)p_image->y0);
*p_ty1 = opj_int_min((OPJ_INT32)(p_cp->ty0 + (q + 1) * p_cp->tdy), (OPJ_INT32)p_image->y1);
*p_tx0 = (OPJ_INT32)opj_uint_max(p_cp->tx0 + p * p_cp->tdx, p_image->x0);
*p_tx1 = (OPJ_INT32)opj_uint_min(p_cp->tx0 + (p + 1) * p_cp->tdx, p_image->x1);
*p_ty0 = (OPJ_INT32)opj_uint_max(p_cp->ty0 + q * p_cp->tdy, p_image->y0);
*p_ty1 = (OPJ_INT32)opj_uint_min(p_cp->ty0 + (q + 1) * p_cp->tdy, p_image->y1);
/* max precision and resolution is 0 (can only grow)*/
*p_max_prec = 0;

9
src/lib/openjp2/tcd.c
View File

@ -701,10 +701,11 @@ static INLINE OPJ_BOOL opj_tcd_init_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no,
/*fprintf(stderr, "Tile coordinate = %d,%d\n", p, q);*/
/* 4 borders of the tile rescale on the image if necessary */
l_tile->x0 = opj_int_max((OPJ_INT32)(l_cp->tx0 + p * l_cp->tdx), (OPJ_INT32)l_image->x0);
l_tile->y0 = opj_int_max((OPJ_INT32)(l_cp->ty0 + q * l_cp->tdy), (OPJ_INT32)l_image->y0);
l_tile->x1 = opj_int_min((OPJ_INT32)(l_cp->tx0 + (p + 1) * l_cp->tdx), (OPJ_INT32)l_image->x1);
l_tile->y1 = opj_int_min((OPJ_INT32)(l_cp->ty0 + (q + 1) * l_cp->tdy), (OPJ_INT32)l_image->y1);
l_tile->x0 = (OPJ_INT32)opj_uint_max(l_cp->tx0 + p * l_cp->tdx, l_image->x0);
l_tile->y0 = (OPJ_INT32)opj_uint_max(l_cp->ty0 + q * l_cp->tdy, l_image->y0);
l_tile->x1 = (OPJ_INT32)opj_uint_min(l_cp->tx0 + (p + 1) * l_cp->tdx, l_image->x1);
l_tile->y1 = (OPJ_INT32)opj_uint_min(l_cp->ty0 + (q + 1) * l_cp->tdy, l_image->y1);
/* testcase 1888.pdf.asan.35.988 */
if (l_tccp->numresolutions == 0) {
fprintf(stderr, "tiles require at least one resolution\n");