From: ye xingchen <ye.xingchen@zte.com.cn>
Date: Wed, 21 Sep 2022 09:35:17 +0000 (+0000)
Subject: cgroup: use strscpy() is more robust and safer
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8619e94d3be376bb5e8f20988c0e6e3309d2b09a;p=linux.git

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 c37b8265c0a38..151c55d2e0160 100644
--- 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);