https://github.com/python/cpython/commit/d22c066b802592932f9eb18434782299e80ca42e
commit: d22c066b802592932f9eb18434782299e80ca42e
branch: main
author: Serhiy Storchaka <storch...@gmail.com>
committer: serhiy-storchaka <storch...@gmail.com>
date: 2024-01-23T23:27:04+02:00
summary:
gh-114492: Initialize struct termios before calling tcgetattr() (GH-114495)
On Alpine Linux it could leave some field non-initialized.
files:
A Misc/NEWS.d/next/Library/2024-01-23-21-20-40.gh-issue-114492.vKxl5o.rst
M Modules/termios.c
diff --git
a/Misc/NEWS.d/next/Library/2024-01-23-21-20-40.gh-issue-114492.vKxl5o.rst
b/Misc/NEWS.d/next/Library/2024-01-23-21-20-40.gh-issue-114492.vKxl5o.rst
new file mode 100644
index 00000000000000..8df8299d0dffcd
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-01-23-21-20-40.gh-issue-114492.vKxl5o.rst
@@ -0,0 +1,2 @@
+Make the result of :func:`termios.tcgetattr` reproducible on Alpine Linux.
+Previously it could leave a random garbage in some fields.
diff --git a/Modules/termios.c b/Modules/termios.c
index c4f0fd9d50044a..69dbd88be5fcc2 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -98,6 +98,8 @@ termios_tcgetattr_impl(PyObject *module, int fd)
struct termios mode;
int r;
+ /* Alpine Linux can leave some fields uninitialized. */
+ memset(&mode, 0, sizeof(mode));
Py_BEGIN_ALLOW_THREADS
r = tcgetattr(fd, &mode);
Py_END_ALLOW_THREADS
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