1 files changed, 23 insertions, 0 deletions
diff --git a/external/python3/ubsan.patch.0 b/external/python3/ubsan.patch.0
index 938acc1f1725..9f458b1e0f95 100644
--- a/external/python3/ubsan.patch.0
+++ b/external/python3/ubsan.patch.0
@@ -18,3 +18,26 @@
  
  	/*	Set the carry bit if the function uses any sse registers.
  		This is clc or stc, together with the first byte of the jmp.  */
+--- Modules/posixmodule.c
++++ Modules/posixmodule.c
+@@ -23,6 +23,9 @@
+ };
+ 
+ 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/listobject.c
++++ Objects/listobject.c
+@@ -548,7 +548,7 @@
+         dest[i] = 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];
+         Py_INCREF(v);