From: Cristy <urban-warrior@imagemagick.org>
Date: Wed, 24 Jan 2018 12:42:18 +0000 (-0500)
Subject: Eliminate buffer overwrite in DPX coder
X-Git-Tag: 7.0.7-23~283
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=901d1c1a8f432f773a29fd37740d1f7b118b55a5;p=imagemagick

Eliminate buffer overwrite in DPX coder
Credit OSS Fuzz
---

diff --git a/MagickCore/quantum-import.c b/MagickCore/quantum-import.c
index 78282baa1..c3d763211 100644
--- a/MagickCore/quantum-import.c
+++ b/MagickCore/quantum-import.c
@@ -1421,7 +1421,7 @@ static void ImportCbYCrYQuantum(const Image *image,QuantumInfo *quantum_info,
 
           n=0;
           quantum=0;
-          for (x=0; x < (ssize_t) number_pixels; x+=4)
+          for (x=0; x < (ssize_t) (number_pixels-3); x+=4)
           {
             for (i=0; i < 4; i++)
             {