closes bpo-37420: Handle errors during iteration in os.sched_setaffinity. (GH-14414)

Lib/test/test_posix.py

@@ -1368,6 +1368,7 @@ class PosixTester(unittest.TestCase):
         self.assertEqual(posix.sched_getaffinity(0), mask)
         self.assertRaises(OSError, posix.sched_setaffinity, 0, [])
         self.assertRaises(ValueError, posix.sched_setaffinity, 0, [-10])
+        self.assertRaises(ValueError, posix.sched_setaffinity, 0, map(int, "0X"))
         self.assertRaises(OverflowError, posix.sched_setaffinity, 0, [1<<128])
         self.assertRaises(OSError, posix.sched_setaffinity, -1, mask)
 

Misc/NEWS.d/next/Library/2019-06-26-22-25-05.bpo-37420.CxFJ09.rst

+:func:`os.sched_setaffinity` now correctly handles errors that arise during iteration over its ``mask`` argument.
+Patch by Brandt Bucher.
\ No newline at end of file

Modules/posixmodule.c

@@ -6413,6 +6413,9 @@ os_sched_setaffinity_impl(PyObject *module, pid_t pid, PyObject *mask)
         }
         CPU_SET_S(cpu, setsize, cpu_set);
     }
+    if (PyErr_Occurred()) {
+        goto error;
+    }
     Py_CLEAR(iterator);
 
     if (sched_setaffinity(pid, setsize, cpu_set)) {