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Fix an integer overflow issue 

Prevent an integer overflow issue in function opj_pi_create_decode of
pi.c.
This commit is contained in:
TryLab 2016-08-16 17:22:57 +08:00
parent 4a2a8693e5
commit 713429b8fa
1 changed files with 8 additions and 1 deletions
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9
src/lib/openjp2/pi.c
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@ -36,6 +36,7 @@
* POSSIBILITY OF SUCH DAMAGE. * POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <limits.h>
#include "opj_includes.h" #include "opj_includes.h"
/** @defgroup PI PI - Implementation of a packet iterator */ /** @defgroup PI PI - Implementation of a packet iterator */
@ -1237,7 +1238,13 @@ opj_pi_iterator_t *opj_pi_create_decode(opj_image_t *p_image,
l_current_pi = l_pi; l_current_pi = l_pi;
/* memory allocation for include */ /* memory allocation for include */
l_current_pi->include = (OPJ_INT16*) opj_calloc((l_tcp->numlayers +1) * l_step_l, sizeof(OPJ_INT16)); /* prevent an integer overflow issue */
l_current_pi->include = 00;
if (l_step_l && l_tcp->numlayers < UINT_MAX / l_step_l - 1)
{
l_current_pi->include = (OPJ_INT16*) opj_calloc((l_tcp->numlayers +1) * l_step_l, sizeof(OPJ_INT16));
}
if if
(!l_current_pi->include) (!l_current_pi->include)
{ {