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netfilter: nft_osf: refactor deprecated strncpy

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Use `strscpy_pad` over `strncpy` for NUL-terminated strings.

We can also drop the + 1 from `NFT_OSF_MAXGENRELEN + 1` since `strscpy`
will guarantee NUL-termination.

Signed-off-by: Justin Stitt <justinstitt@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
This commit is contained in:
Justin Stitt 2023-08-09 01:06:08 +00:00 committed by Florian Westphal
parent 7457af8bf9
commit 6d87a4eae8
1 changed files with 3 additions and 3 deletions
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6
net/netfilter/nft_osf.c
View file

@ -23,7 +23,7 @@ static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
struct nft_osf *priv = nft_expr_priv(expr);
u32 *dest = &regs->data[priv->dreg];
struct sk_buff *skb = pkt->skb;
char os_match[NFT_OSF_MAXGENRELEN + 1];
char os_match[NFT_OSF_MAXGENRELEN];
const struct tcphdr *tcp;
struct nf_osf_data data;
struct tcphdr _tcph;
@ -45,7 +45,7 @@ static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
}
if (!nf_osf_find(skb, nf_osf_fingers, priv->ttl, &data)) {
strncpy((char *)dest, "unknown", NFT_OSF_MAXGENRELEN);
strscpy_pad((char *)dest, "unknown", NFT_OSF_MAXGENRELEN);
} else {
if (priv->flags & NFT_OSF_F_VERSION)
snprintf(os_match, NFT_OSF_MAXGENRELEN, "%s:%s",
@ -53,7 +53,7 @@ static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
else
strscpy(os_match, data.genre, NFT_OSF_MAXGENRELEN);
strncpy((char *)dest, os_match, NFT_OSF_MAXGENRELEN);
strscpy_pad((char *)dest, os_match, NFT_OSF_MAXGENRELEN);
}
}