File a1eccee18.patch of Package freeradius-server.7382

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File a1eccee18.patch of Package freeradius-server.7382

commit a1eccee1872b4019e98e399f0f4597a41ef057a7
Author: Arran Cudbard-Bell <a.cudbardb@freeradius.org>
Date:   Wed Jul 5 12:40:47 2017 -0400

FR-AD-002 - Bind the lifetime of program name and python path to the module
    
    PySys_SetPath and PySys_SetName don't appear to duplicate the buffer, they just store a pointer.

diff --git a/src/modules/rlm_python/rlm_python.c b/src/modules/rlm_python/rlm_python.c
index c52cec52c..8261cfd7a 100644
--- a/src/modules/rlm_python/rlm_python.c
+++ b/src/modules/rlm_python/rlm_python.c
@@ -67,6 +67,11 @@ typedef struct rlm_python_t {
 	char const	*name;			//!< Name of the module instance
 	PyThreadState	*sub_interpreter;	//!< The main interpreter/thread used for this instance.
 	char const	*python_path;		//!< Path to search for python files in.
+
+#if PY_VERSION_HEX > 0x03050000
+	wchar_t		*wide_name;		//!< Special wide char encoding of radiusd name.
+	wchar_t		*wide_path;		//!< Special wide char encoding of radiusd path.
+#endif
 	PyObject	*module;		//!< Local, interpreter specific module, containing
 						//!< FreeRADIUS functions.
 	bool		cext_compat;		//!< Whether or not to create sub-interpreters per module
@@ -855,19 +860,15 @@ static int python_interpreter_init(rlm_python_t *inst, CONF_SECTION *conf)
 
 #if PY_VERSION_HEX > 0x03050000
 		{
-			wchar_t *name;
-
-			wide_name = Py_DecodeLocale(main_config.name, strlen(main_config.name));
+			inst->wide_name = Py_DecodeLocale(main_config.name, strlen(main_config.name));
 			Py_SetProgramName(name);		/* The value of argv[0] as a wide char string */
-			PyMem_RawFree(name);
 		}
 #else
 		{
 			char *name;
 
-			name = talloc_strdup(NULL, main_config.name);
+			memcpy(&name, &main_config.name, sizeof(name));
 			Py_SetProgramName(name);		/* The value of argv[0] as a wide char string */
-			talloc_free(name);
 		}
 #endif
 
@@ -903,23 +904,23 @@ static int python_interpreter_init(rlm_python_t *inst, CONF_SECTION *conf)
 
 		/*
 		 *	Set the python search path
+		 *
+		 *	The path buffer does not appear to be dup'd
+		 *	so its lifetime should really be bound to
+		 *	the lifetime of the module.
 		 */
 		if (inst->python_path) {
 #if PY_VERSION_HEX > 0x03050000
 			{
-				wchar_t *name;
-
-				path = Py_DecodeLocale(inst->python_path, strlen(inst->python_path));
+				inst->wide_path = Py_DecodeLocale(inst->python_path, strlen(inst->python_path));
 				PySys_SetPath(path);
-				PyMem_RawFree(path);
 			}
 #else
 			{
 				char *path;
 
-				path = talloc_strdup(NULL, inst->python_path);
+				memcpy(&path, inst->python_path, sizeof(path));
 				PySys_SetPath(path);
-				talloc_free(path);
 			}
 #endif
 		}
@@ -1087,8 +1088,14 @@ static int mod_detach(void *instance)
 		PyThreadState_Swap(main_interpreter); /* Swap to the main thread */
 		Py_Finalize();
 		dlclose(python_dlhandle);
+
+#if PY_VERSION_HEX > 0x03050000
+		if (inst->wide_name) PyMem_RawFree(inst->wide_name);
+		if (inst->wide_path) PyMem_RawFree(inst->wide_path);
+#endif
 	}
 
+
 	return ret;
 }

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