fix bug of group conv free problem

mindspore/lite/src/runtime/kernel/arm/fp32/convolution.cc

@@ -159,6 +159,16 @@ int ConvolutionCPUKernel::Run() {
   return RET_OK;
 }
 
+ConvParameter *CreateNewConvParameter(ConvParameter *parameter) {
+  auto conv_parameter = reinterpret_cast<ConvParameter *>(malloc(sizeof(ConvParameter)));
+  if (conv_parameter == nullptr) {
+    MS_LOG(ERROR) << "Malloc new conv parameter failed.";
+    return nullptr;
+  }
+  memcpy(conv_parameter, parameter, sizeof(ConvParameter));
+  return conv_parameter;
+}
+
 kernel::LiteKernel *CpuConvFp32KernelSelect(const std::vector<lite::Tensor *> &inputs,
                                             const std::vector<lite::Tensor *> &outputs, OpParameter *op_parameter,
                                             const InnerContext *ctx, const mindspore::lite::PrimitiveC *primitive,
@@ -215,6 +225,11 @@ kernel::LiteKernel *CpuGroupConvFp32KernelCreator(const std::vector<lite::Tensor
   for (int i = 0; i < group; ++i) {
     std::vector<lite::Tensor *> new_inputs;
     std::vector<lite::Tensor *> new_outputs;
+    auto new_conv_parameter = CreateNewConvParameter(conv_param);
+    if (new_conv_parameter == nullptr) {
+      MS_LOG(ERROR) << "Get new conv parameter failed.";
+      return nullptr;
+    }
     // get new input for each group
     auto in_tensor =
       new (std::nothrow) lite::Tensor(inputs.front()->data_type(), in_shape, Format_NHWC, lite::Tensor::Category::VAR);
@@ -253,10 +268,10 @@ kernel::LiteKernel *CpuGroupConvFp32KernelCreator(const std::vector<lite::Tensor
       new_outputs.emplace_back(tmp_out_tensor);
     }
 
-    group_convs.emplace_back(
-      CpuConvFp32KernelSelect(new_inputs, new_outputs, op_parameter, ctx, primitive, use_winograd, out_unit));
+    group_convs.emplace_back(CpuConvFp32KernelSelect(new_inputs, new_outputs,
+                                                     reinterpret_cast<OpParameter *>(new_conv_parameter), ctx,
+                                                     primitive, use_winograd, out_unit));
   }
-  // sub kernels and group conv kernel share the same op_parameter struct
   return new (std::nothrow)
     GroupConvolutionCPUKernel(op_parameter, inputs, outputs, ctx, primitive, group_convs, group);
 }