Issue #8651: PyArg_Parse*() functions raise an OverflowError if the file
doesn't have PY_SSIZE_T_CLEAN define and the size doesn't fit in an int (length
bigger than 2^31-1 bytes).
diff --git a/Python/getargs.c b/Python/getargs.c
index 02351ed..eccdc9b 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -585,7 +585,17 @@
#define FETCH_SIZE int *q=NULL;Py_ssize_t *q2=NULL;\
if (flags & FLAG_SIZE_T) q2=va_arg(*p_va, Py_ssize_t*); \
else q=va_arg(*p_va, int*);
-#define STORE_SIZE(s) if (flags & FLAG_SIZE_T) *q2=s; else *q=s;
+#define STORE_SIZE(s) \
+ if (flags & FLAG_SIZE_T) \
+ *q2=s; \
+ else { \
+ if (INT_MAX < s) { \
+ PyErr_SetString(PyExc_OverflowError, \
+ "size does not fit in an int"); \
+ return converterr("", arg, msgbuf, bufsize); \
+ } \
+ *q=s; \
+ }
#define BUFFER_LEN ((flags & FLAG_SIZE_T) ? *q2:*q)
const char *format = *p_format;