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-rw-r--r--kernel/pid_namespace.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index ea567b78d1aa..598f1eec9826 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -179,9 +179,12 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns)
rc = sys_wait4(-1, NULL, __WALL, NULL);
} while (rc != -ECHILD);
-
- /* Child reaper for the pid namespace is going away */
- pid_ns->child_reaper = NULL;
+ /*
+ * We can not clear ->child_reaper or leave it alone.
+ * There may by stealth EXIT_DEAD tasks on ->children,
+ * forget_original_parent() must move them somewhere.
+ */
+ pid_ns->child_reaper = init_pid_ns.child_reaper;
acct_exit_ns(pid_ns);
return;
}