netdev - Re: [PATCH] sunrpc: avoid -Wformat-security warning

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Message-ID: <90aeaea1150b0724649716f99019bce8089ee6a1.camel@kernel.org>
Date: Fri, 19 Jul 2024 07:57:35 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Arnd Bergmann <arnd@...nel.org>, Chuck Lever <chuck.lever@...cle.com>, 
 Trond Myklebust <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>, Neil Brown <neilb@...e.de>, Olga
 Kornievskaia <kolga@...app.com>, Dai Ngo <Dai.Ngo@...cle.com>, Tom Talpey
 <tom@...pey.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Benjamin Coddington <bcodding@...hat.com>, Josef Bacik
 <josef@...icpanda.com>,  linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sunrpc: avoid -Wformat-security warning

On Fri, 2024-07-19 at 12:54 +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> Using a non-constant string as an sprintf-style is potentially dangerous:
> 
> net/sunrpc/svc.c: In function 'param_get_pool_mode':
> net/sunrpc/svc.c:164:32: error: format not a string literal and no format arguments [-Werror=format-security]
> 
> Use a literal "%s" format instead.
> 
> Fixes: 5f71f3c32553 ("sunrpc: refactor pool_mode setting code")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  net/sunrpc/svc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
> index e03f14024e47..88a59cfa5583 100644
> --- a/net/sunrpc/svc.c
> +++ b/net/sunrpc/svc.c
> @@ -161,7 +161,7 @@ param_get_pool_mode(char *buf, const struct kernel_param *kp)
>  	str[len] = '\n';
>  	str[len + 1] = '\0';
>  
> -	return sysfs_emit(buf, str);
> +	return sysfs_emit(buf, "%s", str);
>  }
>  
>  module_param_call(pool_mode, param_set_pool_mode, param_get_pool_mode,

Reviewed-by: Jeff Layton <jlayton@...nel.org>