From: Stanislav Malyshev <stas@php.net>
Date: Sun, 19 Jun 2016 04:57:25 +0000 (-0700)
Subject: Fix bug #72407: NULL Pointer Dereference at _gdScaleVert
X-Git-Tag: php-5.5.37~7^2~5
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b9ec171e7d25879d97473ca50197c4207420c276;p=php

Fix bug #72407: NULL Pointer Dereference at _gdScaleVert
---

diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c
index 0961c08048..4fa23f0a14 100644
--- a/ext/gd/libgd/gd_interpolation.c
+++ b/ext/gd/libgd/gd_interpolation.c
@@ -1049,6 +1049,9 @@ static inline void _gdScaleVert (const gdImagePtr pSrc, const unsigned int src_w
 	}
 
 	contrib = _gdContributionsCalc(dst_height, src_height, (double)(dst_height) / (double)(src_height), pSrc->interpolation);
+	if (contrib == NULL) {
+		return;
+	}
 	/* scale each column */
 	for (u = 0; u < dst_width - 1; u++) {
 		_gdScaleCol(pSrc, src_width, pDst, dst_width, dst_height, u, contrib);