linux-kernel - [PATCH net-next] caif: Replace memset(0) + strscpy() with strscpy

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Message-ID: <20250811093442.5075-2-thorsten.blum@linux.dev>
Date: Mon, 11 Aug 2025 11:34:40 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Arnd Bergmann <arnd@...db.de>
Cc: Thorsten Blum <thorsten.blum@...ux.dev>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next] caif: Replace memset(0) + strscpy() with strscpy_pad()

Replace memset(0) followed by strscpy() with strscpy_pad() to improve
cfctrl_linkup_request(). This avoids zeroing the memory before copying
the string and ensures the destination buffer is only written to once,
simplifying the code and improving efficiency.

Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 net/caif/cfctrl.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/caif/cfctrl.c b/net/caif/cfctrl.c
index 06b604cf9d58..2aa1e7d46eb2 100644
--- a/net/caif/cfctrl.c
+++ b/net/caif/cfctrl.c
@@ -257,9 +257,7 @@ int cfctrl_linkup_request(struct cflayer *layer,
 		cfpkt_add_body(pkt, &tmp16, 2);
 		tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs);
 		cfpkt_add_body(pkt, &tmp16, 2);
-		memset(utility_name, 0, sizeof(utility_name));
-		strscpy(utility_name, param->u.utility.name,
-			UTILITY_NAME_LENGTH);
+		strscpy_pad(utility_name, param->u.utility.name);
 		cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH);
 		tmp8 = param->u.utility.paramlen;
 		cfpkt_add_body(pkt, &tmp8, 1);
-- 
2.50.1