[patch] CVE-2016-7163-1.patch

CVE-2016-7163-1.patch (text/plain), 1.03 KB, created by Andrey Ovcharov on 2017-06-12 15:14:23 UTC

From c16bc057ba3f125051c9966cf1f5b68a05681de4 Mon Sep 17 00:00:00 2001
From: trylab <[e-mail]>
Date: Tue, 6 Sep 2016 13:55:49 +0800
Subject: [PATCH] Fix an integer overflow issue (#809)

Prevent an integer overflow issue in function opj_pi_create_decode of
pi.c.
---
 src/lib/openjp2/pi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/lib/openjp2/pi.c b/src/lib/openjp2/pi.c
index cffad66..36e2ff0 100644
--- a/src/lib/openjp2/pi.c
+++ b/src/lib/openjp2/pi.c
@@ -1237,7 +1237,13 @@ opj_pi_iterator_t *opj_pi_create_decode(opj_image_t *p_image,
 	l_current_pi = l_pi;
 
 	/* 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 <= (SIZE_MAX / (l_tcp->numlayers + 1U)))
+	{
+		l_current_pi->include = (OPJ_INT16*) opj_calloc((l_tcp->numlayers +1) * l_step_l, sizeof(OPJ_INT16));
+	}
+
 	if
 		(!l_current_pi->include)
 	{
-- 
2.10.0