netdev - Re: [PATCH net-next v2 1/1] netfilter: conntrack: Guard possible unused functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240909183546.GF2097826@kernel.org>
Date: Mon, 9 Sep 2024 19:35:46 +0100
From: Simon Horman <horms@...nel.org>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Pablo Neira Ayuso <pablo@...filter.org>,
	Felix Huettner <felix.huettner@...l.schwarz>,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, Jozsef Kadlecsik <kadlec@...filter.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>
Subject: Re: [PATCH net-next v2 1/1] netfilter: conntrack: Guard possible
 unused functions

On Mon, Sep 09, 2024 at 06:39:56PM +0300, Andy Shevchenko wrote:
> Some of the functions may be unused, it prevents kernel builds
> with clang, `make W=1` and CONFIG_WERROR=y:
> 
> net/netfilter/nf_conntrack_netlink.c:657:22: error: unused function 'ctnetlink_acct_size' [-Werror,-Wunused-function]
>   657 | static inline size_t ctnetlink_acct_size(const struct nf_conn *ct)
>       |                      ^~~~~~~~~~~~~~~~~~~
> net/netfilter/nf_conntrack_netlink.c:667:19: error: unused function 'ctnetlink_secctx_size' [-Werror,-Wunused-function]
>   667 | static inline int ctnetlink_secctx_size(const struct nf_conn *ct)
>       |                   ^~~~~~~~~~~~~~~~~~~~~
> net/netfilter/nf_conntrack_netlink.c:683:22: error: unused function 'ctnetlink_timestamp_size' [-Werror,-Wunused-function]
>   683 | static inline size_t ctnetlink_timestamp_size(const struct nf_conn *ct)
>       |                      ^~~~~~~~~~~~~~~~~~~~~~~~
> 
> Fix this by guarding possible unused functions with ifdeffery.

I think it would be worth mentioning, that
the condition is that neither CONFIG_NETFILTER_NETLINK_GLUE_CT
nor CONFIG_NF_CONNTRACK_EVENTS are defined (enabled).

> 
> See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
> inline functions for W=1 build").
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> v2: fixed typo, dropped Fixes (Simon), optimised by reusing existing ifdeffery
>  net/netfilter/nf_conntrack_netlink.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

...