[PATCH 5/7] netfilter: nft_osf: refactor deprecated strncpy to strscpy

From: Justin Stitt
Date: Tue Aug 08 2023 - 18:48:51 EST


Use `strscpy` 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@xxxxxxxxxx>
---
net/netfilter/nft_osf.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nft_osf.c b/net/netfilter/nft_osf.c
index 70820c66b591..4844e0109a58 100644
--- a/net/netfilter/nft_osf.c
+++ b/net/netfilter/nft_osf.c
@@ -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((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((char *)dest, os_match, NFT_OSF_MAXGENRELEN);
}
}


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2.41.0.640.ga95def55d0-goog