Issue #22518: Fixed integer overflow issues in "backslashreplace",
"xmlcharrefreplace", and "surrogatepass" error handlers.
diff --git a/Misc/NEWS b/Misc/NEWS
index c0046ce..8fbf58b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #22518: Fixed integer overflow issues in "backslashreplace",
+ "xmlcharrefreplace", and "surrogatepass" error handlers.
+
- Issue #22520: Fix overflow checking when generating the repr of a unicode
object.
diff --git a/Python/codecs.c b/Python/codecs.c
index 0b736c1..ea33c49 100644
--- a/Python/codecs.c
+++ b/Python/codecs.c
@@ -727,7 +727,7 @@
Py_ssize_t end;
PyObject *res;
unsigned char *outp;
- int ressize;
+ Py_ssize_t ressize;
Py_UCS4 ch;
if (PyUnicodeEncodeError_GetStart(exc, &start))
return NULL;
@@ -735,6 +735,8 @@
return NULL;
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
return NULL;
+ if (end - start > PY_SSIZE_T_MAX / (2+7+1))
+ end = start + PY_SSIZE_T_MAX / (2+7+1);
for (i = start, ressize = 0; i < end; ++i) {
/* object is guaranteed to be "ready" */
ch = PyUnicode_READ_CHAR(object, i);
@@ -823,7 +825,7 @@
Py_ssize_t end;
PyObject *res;
unsigned char *outp;
- int ressize;
+ Py_ssize_t ressize;
Py_UCS4 c;
if (PyUnicodeEncodeError_GetStart(exc, &start))
return NULL;
@@ -831,6 +833,8 @@
return NULL;
if (!(object = PyUnicodeEncodeError_GetObject(exc)))
return NULL;
+ if (end - start > PY_SSIZE_T_MAX / (1+1+8))
+ end = start + PY_SSIZE_T_MAX / (1+1+8);
for (i = start, ressize = 0; i < end; ++i) {
/* object is guaranteed to be "ready" */
c = PyUnicode_READ_CHAR(object, i);