diff --git a/paddle/fluid/platform/device_tracer.cc b/paddle/fluid/platform/device_tracer.cc
index b79768eba258835520daae28f1b2e18266f1e43e..1a9be044e024e4b1dda5ef7d515c65f3a7513710 100644
--- a/paddle/fluid/platform/device_tracer.cc
+++ b/paddle/fluid/platform/device_tracer.cc
@@ -130,8 +130,6 @@ 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;
 }