From 5193e4d8bf159b57f6a3b3b33045dc04b2109012 Mon Sep 17 00:00:00 2001 From: stevens Date: Wed, 15 Jul 2026 00:48:17 +0800 Subject: [PATCH] gh-151126: Fix `PyErr_NoMemory` errors in `_ctypes.c` (GH-152720) (cherry picked from commit d807210fee5606f8d504c1677f7e5ecb5f208a1e) Co-authored-by: stevens --- .../Library/2026-07-01-11-29-13.gh-issue-151126.eElGy5.rst | 3 +++ Modules/_ctypes/_ctypes.c | 1 + 2 files changed, 4 insertions(+) create mode 100644 Misc/NEWS.d/next/Library/2026-07-01-11-29-13.gh-issue-151126.eElGy5.rst diff --git a/Misc/NEWS.d/next/Library/2026-07-01-11-29-13.gh-issue-151126.eElGy5.rst b/Misc/NEWS.d/next/Library/2026-07-01-11-29-13.gh-issue-151126.eElGy5.rst new file mode 100644 index 000000000000000..d5ec1d254ef056e --- /dev/null +++ b/Misc/NEWS.d/next/Library/2026-07-01-11-29-13.gh-issue-151126.eElGy5.rst @@ -0,0 +1,3 @@ +Fix a crash caused by failing to set :exc:`MemoryError` on allocation failure +when passing :class:`ctypes.Structure` or :class:`ctypes.Union` instances by +value to ctypes foreign functions. diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c index d152653d121b33c..27c6b2327314b5b 100644 --- a/Modules/_ctypes/_ctypes.c +++ b/Modules/_ctypes/_ctypes.c @@ -669,6 +669,7 @@ StructUnionType_paramfunc(ctypes_state *st, CDataObject *self) if ((size_t)self->b_size > sizeof(void*)) { ptr = PyMem_Malloc(self->b_size); if (ptr == NULL) { + PyErr_NoMemory(); return NULL; } memcpy(ptr, self->b_ptr, self->b_size);