netdev - [PATCH 3/7] netfilter: nf_tables: refactor deprecated strncpy

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Date: Tue, 08 Aug 2023 22:48:08 +0000
From: Justin Stitt <justinstitt@...gle.com>
To: Pablo Neira Ayuso <pablo@...filter.org>, Jozsef Kadlecsik <kadlec@...filter.org>, 
	Florian Westphal <fw@...len.de>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: linux-hardening@...r.kernel.org, Kees Cook <keescook@...omium.org>, 
	netfilter-devel@...r.kernel.org, coreteam@...filter.org, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Justin Stitt <justinstitt@...gle.com>
Subject: [PATCH 3/7] netfilter: nf_tables: refactor deprecated strncpy

Prefer `strscpy` over `strncpy`.

Signed-off-by: Justin Stitt <justinstitt@...gle.com>

---
Note:
`strscpy` is generally preferred to `strncpy` for use on NUL-terminated
destination strings. In this case, however, it is hard for me to tell if
the dest buffer wants to be NUL-terminated or not. If NUL-termination is
not needed behavior here, let's use `strtomem`.
---
 net/netfilter/nft_fib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nft_fib.c b/net/netfilter/nft_fib.c
index 6e049fd48760..f1a3692f2dbd 100644
--- a/net/netfilter/nft_fib.c
+++ b/net/netfilter/nft_fib.c
@@ -150,7 +150,7 @@ void nft_fib_store_result(void *reg, const struct nft_fib *priv,
 		if (priv->flags & NFTA_FIB_F_PRESENT)
 			*dreg = !!dev;
 		else
-			strncpy(reg, dev ? dev->name : "", IFNAMSIZ);
+			strscpy(reg, dev ? dev->name : "", IFNAMSIZ);
 		break;
 	default:
 		WARN_ON_ONCE(1);

-- 
2.41.0.640.ga95def55d0-goog