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gh-114685: Check flags in PyObject_GetBuffer() (GH-114707)

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PyObject_GetBuffer() now raises a SystemError if called with
PyBUF_READ or PyBUF_WRITE as flags. These flags should
only be used with the PyMemoryView_* C API.
This commit is contained in:
Serhiy Storchaka 2024-01-31 13:11:35 +02:00 • committed by GitHub
parent 7a93db4425
commit b7688ef71e
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4 changed files with 19 additions and 2 deletions
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6
Objects/abstract.c
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@ -425,6 +425,12 @@ PyObject_AsWriteBuffer(PyObject *obj,
int
PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags)
{
if (flags != PyBUF_SIMPLE) { /* fast path */
if (flags == PyBUF_READ || flags == PyBUF_WRITE) {
PyErr_BadInternalCall();
return -1;
}
}
PyBufferProcs *pb = Py_TYPE(obj)->tp_as_buffer;
if (pb == NULL || pb->bf_getbuffer == NULL) {