cgroup: use strscpy() is more robust and safer

The implementation of strscpy() is more robust and safer.

That's now the recommended way to copy NUL terminated strings.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index c37b8265c0a38f56baa7b02faafef466554a504b..151c55d2e01603c80d624c7f5a2e60c04d46abeb 100644 (file)
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -2374,7 +2374,7 @@ int task_cgroup_path(struct task_struct *task, char *buf, size_t buflen)
                ret = cgroup_path_ns_locked(cgrp, buf, buflen, &init_cgroup_ns);
        } else {
                /* if no hierarchy exists, everyone is in "/" */
-               ret = strlcpy(buf, "/", buflen);
+               ret = strscpy(buf, "/", buflen);
        }
 
        spin_unlock_irq(&css_set_lock);