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-rw-r--r--Modules/_ssl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 3377138..51b5399 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -1895,6 +1895,11 @@ _ssl__SSLSocket_read_impl(PySSLSocket *self, int len, int group_right_1,
_PyTime_t timeout, deadline = 0;
int has_timeout;
+ if (!group_right_1 && len < 0) {
+ PyErr_SetString(PyExc_ValueError, "size should not be negative");
+ return NULL;
+ }
+
if (sock != NULL) {
if (((PyObject*)sock) == Py_None) {
_setSSLError("Underlying socket connection gone",