gentoo-overlay/media-gfx/optipng/files/optipng-0.7.6-cve-2017-1000229.patch

From 77ac8e9fd9b2c1aeec3951e2bb50f7cc2c1e92d2 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Sun, 19 Nov 2017 16:04:26 +0100
Subject: [PATCH] Prevent integer overflow (bug #65, CVE-2017-1000229)

---
 src/minitiff/tiffread.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/minitiff/tiffread.c b/src/minitiff/tiffread.c
index b4910ec..5f9b376 100644
--- a/src/minitiff/tiffread.c
+++ b/src/minitiff/tiffread.c
@@ -350,6 +350,8 @@ minitiff_read_info(struct minitiff_info *tiff_ptr, FILE *fp)
         count = tiff_ptr->strip_offsets_count;
         if (count == 0 || count > tiff_ptr->height)
             goto err_invalid;
+        if (count > (size_t)-1 / sizeof(long))
+            goto err_memory;
         tiff_ptr->strip_offsets = (long *)malloc(count * sizeof(long));
         if (tiff_ptr->strip_offsets == NULL)
             goto err_memory;
-- 
2.14.2