Fix CVE-2017-7961:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7961

Patch copied from upstream source repository:

https://git.gnome.org/browse/libcroco/commit/?id=9ad72875e9f08e4c519ef63d44cdbd94aa9504f7

From 9ad72875e9f08e4c519ef63d44cdbd94aa9504f7 Mon Sep 17 00:00:00 2001
From: Ignacio Casal Quinteiro <qignacio@amazon.com>
Date: Sun, 16 Apr 2017 13:56:09 +0200
Subject: tknzr: support only max long rgb values

This fixes a possible out of bound when reading rgbs which
are longer than the support MAXLONG
---
 src/cr-tknzr.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/cr-tknzr.c b/src/cr-tknzr.c
index 1a7cfeb..1548c35 100644
--- a/src/cr-tknzr.c
+++ b/src/cr-tknzr.c
@@ -1279,6 +1279,11 @@ cr_tknzr_parse_rgb (CRTknzr * a_this, CRRgb ** a_rgb)
         status = cr_tknzr_parse_num (a_this, &num);
         ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
 
+        if (num->val > G_MAXLONG) {
+                status = CR_PARSING_ERROR;
+                goto error;
+        }
+
         red = num->val;
         cr_num_destroy (num);
         num = NULL;
@@ -1298,6 +1303,11 @@ cr_tknzr_parse_rgb (CRTknzr * a_this, CRRgb ** a_rgb)
                 status = cr_tknzr_parse_num (a_this, &num);
                 ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
 
+                if (num->val > G_MAXLONG) {
+                        status = CR_PARSING_ERROR;
+                        goto error;
+                }
+
                 PEEK_BYTE (a_this, 1, &next_bytes[0]);
                 if (next_bytes[0] == '%') {
                         SKIP_CHARS (a_this, 1);
-- 
cgit v0.12

