commit 682107cf458578ee6bd92b7cc6862113034a4fad
author Zackery Spytz <zspytz@gmail.com> Mon Sep 09 09:48:32 2019 -0600
committer T. Wouters <thomas@python.org> Mon Sep 09 08:48:32 2019 -0700
tree ccde00cbac424b2a41058fddb53c003d06ea8885
parent d91d4de31745fc1ed4c7e6c208917827c9c472b6

bpo-36279: Ensure os.wait3() rusage is initialized (GH-15111)

Co-Authored-By: David Wilson <dw@botanicus.net>

Modules/posixmodule.c

diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 81704ee..a0a2a30 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -7489,6 +7489,12 @@
     if (pid == -1)
         return posix_error();
 
+    // If wait succeeded but no child was ready to report status, ru will not
+    // have been populated.
+    if (pid == 0) {
+        memset(ru, 0, sizeof(*ru));
+    }
+
     if (struct_rusage == NULL) {
         PyObject *m = PyImport_ImportModuleNoBlock("resource");
         if (m == NULL)