From 0d4fd20a73539573d72222c6c2dc3b8726e7e02f Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Fri, 31 Aug 2018 12:56:02 +0300
Subject: [PATCH] imgcodecs: add null pointer check

---
 modules/imgcodecs/src/loadsave.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/modules/imgcodecs/src/loadsave.cpp b/modules/imgcodecs/src/loadsave.cpp
index f5d9c98a3b..d4be6ae4fb 100644
--- a/modules/imgcodecs/src/loadsave.cpp
+++ b/modules/imgcodecs/src/loadsave.cpp
@@ -396,6 +396,8 @@ static void ApplyExifOrientation(const Mat& buf, Mat& img)
 static void*
 imread_( const String& filename, int flags, int hdrtype, Mat* mat=0 )
 {
+    CV_Assert(mat || hdrtype != LOAD_MAT); // mat is required in LOAD_MAT case
+
     IplImage* image = 0;
     CvMat *matrix = 0;
     Mat temp, *data = &temp;