netdev - [PATCH net-next] eth: bnxt: fix string truncation warning in FW version

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Message-ID: <20250117183726.1481524-1-kuba@kernel.org>
Date: Fri, 17 Jan 2025 10:37:26 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org,
	Jakub Kicinski <kuba@...nel.org>,
	michael.chan@...adcom.com,
	pavan.chebbi@...adcom.com
Subject: [PATCH net-next] eth: bnxt: fix string truncation warning in FW version

W=1 builds with gcc 14.2.1 report:

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c:4193:32: error: ‘%s’ directive output may be truncated writing up to 31 bytes into a region of size 27 [-Werror=format-truncation=]
 4193 |                          "/pkg %s", buf);

It's upset that we let buf be full length but then we use 5
characters for "/pkg ".

The builds is also clear with clang version 19.1.5 now.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: michael.chan@...adcom.com
CC: pavan.chebbi@...adcom.com
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 540c140d52dc..65a20931c579 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -4184,7 +4184,7 @@ int bnxt_get_pkginfo(struct net_device *dev, char *ver, int size)
 static void bnxt_get_pkgver(struct net_device *dev)
 {
 	struct bnxt *bp = netdev_priv(dev);
-	char buf[FW_VER_STR_LEN];
+	char buf[FW_VER_STR_LEN - 5];
 	int len;
 
 	if (!bnxt_get_pkginfo(dev, buf, sizeof(buf))) {
-- 
2.48.1