diff --git a/gcc/builtin-attrs.def b/gcc/builtin-attrs.def
index dcaeee9..1d22099 100644
--- a/gcc/builtin-attrs.def
+++ b/gcc/builtin-attrs.def
@@ -201,6 +201,9 @@ DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL, ATTR_MALLOC, ATTR_NULL, \
 /* Nothrow malloc leaf functions whose pointer parameter(s) are all nonnull.  */
 DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_NONNULL_LEAF, ATTR_MALLOC, ATTR_NULL, \
            ATTR_NOTHROW_NONNULL_LEAF)
+/* Nothrow malloc leaf functions. */
+DEF_ATTR_TREE_LIST (ATTR_MALLOC_NOTHROW_LEAF, ATTR_MALLOC, ATTR_NULL, \
+           ATTR_NOTHROW_LEAF_LIST)

 /* Construct a tree for a format attribute.  */
 #define DEF_FORMAT_ATTRIBUTE(TYPE, FA, VALUES)              \
diff --git a/gcc/builtins.def b/gcc/builtins.def
index 4f378fa..5af28ba 100644
--- a/gcc/builtins.def
+++ b/gcc/builtins.def
@@ -553,7 +553,7 @@ DEF_LIB_BUILTIN        (BUILT_IN_STRCHR, "strchr", BT_FN_STRING_CONST_STRING_INT
 DEF_LIB_BUILTIN        (BUILT_IN_STRCMP, "strcmp", BT_FN_INT_CONST_STRING_CONST_STRING, ATTR_PURE_NOTHROW_NONNULL_LEAF)
 DEF_LIB_BUILTIN        (BUILT_IN_STRCPY, "strcpy", BT_FN_STRING_STRING_CONST_STRING, ATTR_RET1_NOTHROW_NONNULL_LEAF)
 DEF_LIB_BUILTIN        (BUILT_IN_STRCSPN, "strcspn", BT_FN_SIZE_CONST_STRING_CONST_STRING, ATTR_PURE_NOTHROW_NONNULL_LEAF)
-DEF_EXT_LIB_BUILTIN    (BUILT_IN_STRDUP, "strdup", BT_FN_STRING_CONST_STRING, ATTR_MALLOC_NOTHROW_NONNULL_LEAF)
+DEF_EXT_LIB_BUILTIN    (BUILT_IN_STRDUP, "strdup", BT_FN_STRING_CONST_STRING, ATTR_MALLOC_NOTHROW_LEAF)
 DEF_EXT_LIB_BUILTIN    (BUILT_IN_STRNDUP, "strndup", BT_FN_STRING_CONST_STRING_SIZE, ATTR_MALLOC_NOTHROW_NONNULL_LEAF)
 DEF_LIB_BUILTIN        (BUILT_IN_STRLEN, "strlen", BT_FN_SIZE_CONST_STRING, ATTR_PURE_NOTHROW_NONNULL_LEAF)
 DEF_EXT_LIB_BUILTIN    (BUILT_IN_STRNCASECMP, "strncasecmp", BT_FN_INT_CONST_STRING_CONST_STRING_SIZE, ATTR_PURE_NOTHROW_NONNULL_LEAF)