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Message-ID: <20250501202935.46318-1-rubenru09@aol.com>
Date: Thu, 1 May 2025 21:23:55 +0100
From: Ruben Wauters <rubenru09@....com>
To: "David S. Miller" <davem@...emloft.net>,
David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Simon Horman <horms@...nel.org>
Cc: Ruben Wauters <rubenru09@....com>,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 net-next] ipv4: ip_tunnel: Replace strcpy use with strscpy
Use of strcpy is decpreated, replaces the use of strcpy with strscpy as
recommended.
strscpy was chosen as it requires a NUL terminated non-padded string,
which is the case here.
I am aware there is an explicit bounds check above the second instance,
however using strscpy protects against buffer overflows in any future
code, and there is no good reason I can see to not use it.
I have also replaced the scrscpy above that had 3 params with the
version using 2 params. These are functionally equivalent, but it is
cleaner to have both using 2 params.
Signed-off-by: Ruben Wauters <rubenru09@....com>
Reviewed-by: Simon Horman <horms@...nel.org>
---
Changes since v1:
Replace existing 3 parameter strscpy with 2 parameter scrscpy
Edit commit message adding justification for scrscpy and for added
changes
---
net/ipv4/ip_tunnel.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 3913ec89ad20..678b8f96e3e9 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -243,11 +243,11 @@ static struct net_device *__ip_tunnel_create(struct net *net,
if (parms->name[0]) {
if (!dev_valid_name(parms->name))
goto failed;
- strscpy(name, parms->name, IFNAMSIZ);
+ strscpy(name, parms->name);
} else {
if (strlen(ops->kind) > (IFNAMSIZ - 3))
goto failed;
- strcpy(name, ops->kind);
+ strscpy(name, ops->kind);
strcat(name, "%d");
}
--
2.48.1
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