Merge pull request #15937 from clunietp:3.4-fix-13577

modules/core/test/test_umat.cpp

@@ -1383,4 +1383,16 @@ TEST(UMat, testTempObjects_Mat_issue_8693)
     EXPECT_EQ(0, cvtest::norm(srcUMat.getMat(ACCESS_READ), srcMat, NORM_INF));
 }
 
+TEST(UMat, resize_Mat_issue_13577)
+{
+    // save the current state
+    bool useOCL = cv::ocl::useOpenCL();
+
+    cv::ocl::setUseOpenCL(false);
+    UMat foo(10, 10, CV_32FC1);
+    cv::resize(foo, foo, cv::Size(), .5, .5);
+
+    cv::ocl::setUseOpenCL(useOCL);  // restore state
+}
+
 } } // namespace opencv_test::ocl

modules/imgproc/src/resize.cpp

@@ -3738,6 +3738,11 @@ void cv::resize( InputArray _src, OutputArray _dst, Size dsize,
     CV_OCL_RUN(_src.dims() <= 2 && _dst.isUMat() && _src.cols() > 10 && _src.rows() > 10,
                ocl_resize(_src, _dst, dsize, inv_scale_x, inv_scale_y, interpolation))
 
+    // Fake reference to source. Resolves issue 13577 in case of src == dst.
+    UMat srcUMat;
+    if (_src.isUMat())
+        srcUMat = _src.getUMat();
+
     Mat src = _src.getMat();
     _dst.create(dsize, src.type());
     Mat dst = _dst.getMat();