OpenCL Runtime: The use of clUnloadPlatformCompiler () was disabled after some users received unexpected return codes

docs/changes.txt

@@ -69,6 +69,7 @@
 - Memory Management: Check in OpenCL that CL_DEVICE_HOST_UNIFIED_MEMORY is true and if so, then half of the available memory
 - NEO driver: Activate the NEO driver (Intel GPU) after it passed several tests in hashcat using the latest NEO driver version
 - OpenCL Runtime: Workaround for Intel OpenCL runtime: segmentation fault when compiling hc_enc_next() / hc_enc_next_global()
+- OpenCL Runtime: The use of clUnloadPlatformCompiler () was disabled after some users received unexpected return codes
 - RC4 Kernels: Use improved native thread derivation for RC4-based hash modes 7500, 13100, 18200, 25400
 - Shared Memory: Calculate the dynamic memory size of the kernel based on CU_DEVICE_ATTRIBUTE_MAX_SHARED_MEMORY_PER_BLOCK_OPTIN
 - Slow kernels: Set some of the slowest kernels to OPTS_TYPE_MP_MULTI_DISABLE to make it easier to handle small word lists

src/backend.c

@@ -3556,7 +3556,7 @@ int ocl_init (hashcat_ctx_t *hashcat_ctx)
   HC_LOAD_FUNC (ocl, clWaitForEvents,           OCL_CLWAITFOREVENTS,            OpenCL, 1);
   HC_LOAD_FUNC (ocl, clGetEventProfilingInfo,   OCL_CLGETEVENTPROFILINGINFO,    OpenCL, 1);
   HC_LOAD_FUNC (ocl, clReleaseEvent,            OCL_CLRELEASEEVENT,             OpenCL, 1);
-  HC_LOAD_FUNC (ocl, clUnloadPlatformCompiler,  OCL_CLUNLOADPLATFORMCOMPILER,   OpenCL, 1);
+  //HC_LOAD_FUNC (ocl, clUnloadPlatformCompiler,  OCL_CLUNLOADPLATFORMCOMPILER,   OpenCL, 1);
 
   return 0;
 }
@@ -4225,6 +4225,7 @@ int hc_clReleaseEvent (hashcat_ctx_t *hashcat_ctx, cl_event event)
   return 0;
 }
 
+/*
 int hc_clUnloadPlatformCompiler (hashcat_ctx_t *hashcat_ctx, cl_platform_id platform)
 {
   backend_ctx_t *backend_ctx = hashcat_ctx->backend_ctx;
@@ -4242,6 +4243,7 @@ int hc_clUnloadPlatformCompiler (hashcat_ctx_t *hashcat_ctx, cl_platform_id plat
 
   return 0;
 }
+*/
 
 // Backend
 
@@ -11922,13 +11924,15 @@ int backend_session_begin (hashcat_ctx_t *hashcat_ctx)
      * from opencl specs:
      * Calls to clBuildProgram, clCompileProgram or clLinkProgram after clUnloadPlatformCompiler will reload the compiler, if necessary, to build the appropriate program executable.
      */
-
+    // Disabled after user reporting weird errors like CL_OUT_OF_HOST_MEMORY after calling
+    /*
     if (device_param->is_opencl == true)
     {
       cl_platform_id platform_id = backend_ctx->opencl_platforms[device_param->opencl_platform_id];
 
       if (hc_clUnloadPlatformCompiler (hashcat_ctx, platform_id) == -1) return -1;
     }
+    */
 
     // some algorithm collide too fast, make that impossible