From e0060025287b0c369be8d046cf826be54b339dc7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcel=20L=C3=BCtke=20Dreimann?=
 <marcel.luetkedreimann@uos.de>
Date: Mon, 29 Aug 2022 18:13:35 +0200
Subject: [PATCH] fixed memory leak in opencl

---
 repos/hello_gpgpu/src/hello_gpgpu/CL/cl.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/repos/hello_gpgpu/src/hello_gpgpu/CL/cl.cc b/repos/hello_gpgpu/src/hello_gpgpu/CL/cl.cc
index e94253e3a9..0128742964 100644
--- a/repos/hello_gpgpu/src/hello_gpgpu/CL/cl.cc
+++ b/repos/hello_gpgpu/src/hello_gpgpu/CL/cl.cc
@@ -868,8 +868,15 @@ clSetKernelArg(cl_kernel    kernel,
     }
     else
     {
-        // set buffer config
         struct buffer_config& bc = kc->buffConfigs[arg_index];
+        
+        // if we overwrite an old config, free the old one
+        if(bc.buffer != nullptr)
+        {
+            g_cl_genode->free(bc.buffer);
+        }
+
+        // set buffer config
         bc.buffer = g_cl_genode->alloc(arg_size); // alloc shared mem
         bc.buffer_size = (uint32_t)arg_size;
         bc.non_pointer_type = true;