From 4582f697b61477a81772f031fa6b5ef0480b9a3c Mon Sep 17 00:00:00 2001
From: Jacek Czaja <jacek.czaja@intel.com>
Date: Wed, 16 Sep 2020 09:09:08 +0200
Subject: [PATCH] - Fix to concat oneDNN overwritting data (#27273)

test=develop
---
 paddle/fluid/operators/mkldnn/concat_mkldnn_op.cc | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/paddle/fluid/operators/mkldnn/concat_mkldnn_op.cc b/paddle/fluid/operators/mkldnn/concat_mkldnn_op.cc
index 3cafb0e9fc..b2815cbdc6 100644
--- a/paddle/fluid/operators/mkldnn/concat_mkldnn_op.cc
+++ b/paddle/fluid/operators/mkldnn/concat_mkldnn_op.cc
@@ -86,8 +86,10 @@ class ConcatPrimitiveFactory {
   concat CreateConcatPrimitive(const concat::primitive_desc& concat_pd,
                                Tensor* output, platform::CPUPlace place,
                                const mkldnn::engine& mkldnn_engine) {
-    dst_mem = mkldnn::memory(concat_pd.dst_desc(), mkldnn_engine,
-                             output->mutable_data<T>(place));
+    dst_mem = mkldnn::memory(
+        concat_pd.dst_desc(), mkldnn_engine,
+        output->mutable_data<T>(place, concat_pd.dst_desc().get_size()));
+
     return concat(concat_pd);
   }
 
@@ -193,7 +195,9 @@ class ConcatMKLDNNOpKernel : public paddle::framework::OpKernel<T> {
         prim_creator.SetSrcDataHandleByIndex(
             *srcs, i, to_void_cast<T>(multi_input[i]->data<T>()));
       }
-      prim_creator.SetDstDataHandle(*dst_mem, output->mutable_data<T>(place));
+      prim_creator.SetDstDataHandle(
+          *dst_mem,
+          output->mutable_data<T>(place, concat_pd->dst_desc().get_size()));
     }
 
     mkldnn::stream astream(mkldnn_engine);
-- 
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