From 3e0c72ea84f8612f3d2a5e63724926d9f4318acc Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Fri, 26 Oct 2018 14:57:20 +0300
Subject: [PATCH] core(ipp): disable SSE4.2 meanStdDev() optimization for
 CV_32F

---
 modules/core/src/mean.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/modules/core/src/mean.cpp b/modules/core/src/mean.cpp
index b488ee230a..aed5f76ac5 100644
--- a/modules/core/src/mean.cpp
+++ b/modules/core/src/mean.cpp
@@ -674,10 +674,23 @@ static bool ipp_meanStdDev(Mat& src, OutputArray _mean, OutputArray _sdv, Mat& m
     if (cn > 1)
         return false;
 #endif
-#if IPP_VERSION_X100 < 201901
+#if IPP_VERSION_X100 >= 201900 && IPP_VERSION_X100 < 201901
     // IPP_DISABLE: 32f C3C functions can read outside of allocated memory
     if (cn > 1 && src.depth() == CV_32F)
         return false;
+
+    // SSE4.2 buffer overrun
+#if defined(_WIN32) && !defined(_WIN64)
+    // IPPICV doesn't have AVX2 in 32-bit builds
+    // However cv::ipp::getIppTopFeatures() may return AVX2 value on AVX2 capable H/W
+    // details #12959
+#else
+    if (cv::ipp::getIppTopFeatures() == ippCPUID_SSE42) // Linux x64 + OPENCV_IPP=SSE42 is affected too
+#endif
+    {
+        if (src.depth() == CV_32F && src.dims > 1 && src.size[src.dims - 1] == 6)
+            return false;
+    }
 #endif
 
     size_t total_size = src.total();