From 27cdd4f67785759202b3bb193713031ab4a81019 Mon Sep 17 00:00:00 2001
From: Peter van Vugt <pwvanvugt@gmail.com>
Date: Tue, 21 Apr 2026 12:04:58 -0700
Subject: [PATCH 1/2] gh-148850: Fix msan false positive in os.getrandom

---
 Modules/posixmodule.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index e5ce487723b25b..c07d0f89d4e6f0 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -17195,6 +17195,10 @@ os_getrandom_impl(PyObject *module, Py_ssize_t size, int flags)
         goto error;
     }
 
+#ifdef _Py_MEMORY_SANITIZER
+    __msan_unpoison(data, size);
+#endif
+
     return PyBytesWriter_FinishWithSize(writer, n);
 
 error:

From ca5db2bfdfcaaa6c074578a81b1d0ddd448bb4f9 Mon Sep 17 00:00:00 2001
From: "blurb-it[bot]" <43283697+blurb-it[bot]@users.noreply.github.com>
Date: Tue, 21 Apr 2026 19:29:30 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=F0=9F=93=9C=F0=9F=A4=96=20Added=20by=20blu?=
 =?UTF-8?q?rb=5Fit.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../2026-04-21-19-29-29.gh-issue-148850.MSH0J_.rst               | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-04-21-19-29-29.gh-issue-148850.MSH0J_.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-04-21-19-29-29.gh-issue-148850.MSH0J_.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-04-21-19-29-29.gh-issue-148850.MSH0J_.rst
new file mode 100644
index 00000000000000..324d1610310158
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-04-21-19-29-29.gh-issue-148850.MSH0J_.rst
@@ -0,0 +1 @@
+Fix the memory sanitizer false positive in :func:`os.getrandom`.