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-rw-r--r--Modules/datetimemodule.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/Modules/datetimemodule.c b/Modules/datetimemodule.c
index 3443b42..fcbd2e9 100644
--- a/Modules/datetimemodule.c
+++ b/Modules/datetimemodule.c
@@ -1115,6 +1115,8 @@ format_utcoffset(char *buf, size_t buflen, const char *sep,
char sign;
int none;
+ assert(buflen >= 1);
+
offset = call_utcoffset(tzinfo, tzinfoarg, &none);
if (offset == -1 && PyErr_Occurred())
return -1;
@@ -1206,6 +1208,11 @@ wrap_strftime(PyObject *object, const char *format, size_t format_len,
* a new format. Since computing the replacements for those codes
* is expensive, don't unless they're actually used.
*/
+ if (format_len > INT_MAX - 1) {
+ PyErr_NoMemory();
+ goto Done;
+ }
+
totalnew = format_len + 1; /* realistic if no %z/%Z/%f */
newfmt = PyString_FromStringAndSize(NULL, totalnew);
if (newfmt == NULL) goto Done;