diff --git a/paddle/fluid/operators/gather_test.cc b/paddle/fluid/operators/gather_test.cc
index 9c0561b016fdbfa8e48535eaa673a3f85bc936e5..f6b156eb30dae154395b34dcfc26319cd89edbca 100644
--- a/paddle/fluid/operators/gather_test.cc
+++ b/paddle/fluid/operators/gather_test.cc
@@ -43,7 +43,8 @@ TEST(Gather, GatherData) {
   auto* cpu_place = new paddle::platform::CPUPlace();
   paddle::platform::CPUDeviceContext ctx(*cpu_place);
   paddle::operators::CPUGather<int>(ctx, *src, *index, output);
-
+  delete cpu_place;
+  cpu_place = NULL;
   for (int i = 0; i < 4; ++i) EXPECT_EQ(p_output[i], i + 4);
   for (int i = 4; i < 8; ++i) EXPECT_EQ(p_output[i], i - 4);
 
diff --git a/paddle/fluid/operators/math/math_function_test.cc b/paddle/fluid/operators/math/math_function_test.cc
index 3719a264e90ea7d1a99eb9589ce4fd0d8e074781..b545671b43d3a453ab03e4774427179617f62db0 100644
--- a/paddle/fluid/operators/math/math_function_test.cc
+++ b/paddle/fluid/operators/math/math_function_test.cc
@@ -77,6 +77,8 @@ TEST(math_function, gemm_trans_clbas) {
   paddle::platform::CPUDeviceContext context(*cpu_place);
   GetBlas<float>(context).GEMM(false, true, m, n, k, 1, input1_ptr, 3,
                                input2_ptr + 3, 3, 1, input3_ptr + 1, 4);
+  delete cpu_place;
+  cpu_place = NULL;
 
   EXPECT_EQ(input3_ptr[0], 0);
   EXPECT_EQ(input3_ptr[1], 24);
diff --git a/paddle/fluid/platform/device_tracer.cc b/paddle/fluid/platform/device_tracer.cc
index c9e10631680a6ea3876f555a3a6e6c12f79b39d5..3870e69ba7fe6c304b7b5a7bbfe23c725f18e43a 100644
--- a/paddle/fluid/platform/device_tracer.cc
+++ b/paddle/fluid/platform/device_tracer.cc
@@ -130,6 +130,8 @@ void CUPTIAPI bufferRequested(uint8_t **buffer, size_t *size,
   uint8_t *buf = reinterpret_cast<uint8_t *>(malloc(kBufSize + kAlignSize));
   *size = kBufSize;
   *buffer = ALIGN_BUFFER(buf, kAlignSize);
+  free(buf);
+  buf = NULL;
   *maxNumRecords = 0;
 }