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-rw-r--r--Modules/posixmodule.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 7ecd864..2d3eaa3 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -5349,6 +5349,10 @@ posix_read(PyObject *self, PyObject *args)
PyObject *buffer;
if (!PyArg_ParseTuple(args, "ii:read", &fd, &size))
return NULL;
+ if (size < 0) {
+ errno = EINVAL;
+ return posix_error();
+ }
buffer = PyString_FromStringAndSize((char *)NULL, size);
if (buffer == NULL)
return NULL;