python - fix buffer overflows in unicode processing and elsewhere

Modules/almodule.c

 
 #define OLD_INTERFACE           /* define for pre-Irix 6 interface */
 
 #include "Python.h"
 #include "stringobject.h"
 #include <audio.h>
 #include <stdarg.h>
 
 #ifndef AL_NO_ELEM
 #ifndef OLD_INTERFACE
@@ skipping 1615 matching lines @@
         if (return_set == NULL) {
                 PyErr_NoMemory();
                 goto cleanup;
         }
 
   retry:
         nvals = alQueryValues(resource, param, return_set, setsize, quals, qualsize);
         if (nvals < 0)
                 goto cleanup;
         if (nvals > setsize) {
+                ALvalue *old_return_set = return_set;
                 setsize = nvals;
                 PyMem_RESIZE(return_set, ALvalue, setsize);
                 if (return_set == NULL) {
+                        return_set = old_return_set;
                         PyErr_NoMemory();
                         goto cleanup;
                 }
                 goto retry;
         }
 
         if (alGetParamInfo(resource, param, &pinfo) < 0)
                 goto cleanup;
 
         res = PyList_New(nvals);
@@ skipping 1572 matching lines @@
 #ifdef AL_NO_ELEM               /* IRIX 6 */
         (void) alSetErrorHandler(ErrorHandler);
 #endif /* AL_NO_ELEM */
 #ifdef OLD_INTERFACE
         (void) ALseterrorhandler(ErrorHandler);
 #endif /* OLD_INTERFACE */
         
   error:
         return;
 }