--- Modules/posixmodule.c
+++ Modules/posixmodule.c
@@ -13998,6 +13998,9 @@
 };
 
 static int
+#if defined __clang__
+__attribute__((no_sanitize("shift-base"))) // MFD_HUGE_16GB in /usr/include/linux/memfd.h
+#endif
 all_ins(PyObject *m)
 {
 #ifdef F_OK
--- Objects/dictobject.c
+++ Objects/dictobject.c
@@ -1497,7 +1497,7 @@
             if (unicode) { // combined unicode -> combined unicode
                 PyDictUnicodeEntry *newentries = DK_UNICODE_ENTRIES(mp->ma_keys);
                 if (oldkeys->dk_nentries == numentries && mp->ma_keys->dk_kind == DICT_KEYS_UNICODE) {
-                    memcpy(newentries, oldentries, numentries * sizeof(PyDictUnicodeEntry));
+                    memcpy(newentries, (void *) oldentries, numentries * sizeof(PyDictUnicodeEntry));
                 }
                 else {
                     PyDictUnicodeEntry *ep = oldentries;
--- Objects/listobject.c
+++ Objects/listobject.c
@@ -539,7 +539,7 @@
         dest[i] = Py_NewRef(v);
     }
     src = b->ob_item;
-    dest = np->ob_item + Py_SIZE(a);
+    dest = Py_SIZE(a) == 0 ? np->ob_item : np->ob_item + Py_SIZE(a);
     for (i = 0; i < Py_SIZE(b); i++) {
         PyObject *v = src[i];
         dest[i] = Py_NewRef(v);
--- Parser/tokenizer.c
+++ Parser/tokenizer.c
@@ -373,9 +373,9 @@
 
   for (index = tok->tok_mode_stack_index; index >= 0; --index) {
     mode = &(tok->tok_mode_stack[index]);
-    mode->f_string_start = tok->buf + mode->f_string_start_offset;
+    mode->f_string_start = (char *) (((intptr_t) tok->buf) + mode->f_string_start_offset);
     mode->f_string_multi_line_start =
-        tok->buf + mode->f_string_multi_line_start_offset;
+        (char *) (((intptr_t) tok->buf) + mode->f_string_multi_line_start_offset);
   }
 }