get_pid_cred(): proper locking around pid_task

2016-12-25 17:17:03 +09:00
parent 3565959af7
commit e7af537452
1 changed files with 4 additions and 2 deletions
--- a/executer/kernel/mcctrl/procfs.c
+++ b/executer/kernel/mcctrl/procfs.c
@@ -249,7 +249,9 @@ get_pid_cred(int pid)
 	struct task_struct *task = NULL;

 	if (pid > 0) {
+		rcu_read_lock();
 		task = pid_task(find_vpid(pid), PIDTYPE_PID);
+		rcu_read_unlock();
 		if (task) {
 			return __task_cred(task);
 		}