linux-kernel - Re: [PATCH] apparmor: remove unused variable

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Message-ID: <a526a4b9-0391-424e-b537-a5006e42eb90@canonical.com>
Date: Fri, 24 Jan 2025 15:46:45 -0800
From: John Johansen <john.johansen@...onical.com>
To: Arnd Bergmann <arnd@...nel.org>, Paul Moore <paul@...l-moore.com>,
 James Morris <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>
Cc: Arnd Bergmann <arnd@...db.de>, Colin Ian King <colin.i.king@...il.com>,
 apparmor@...ts.ubuntu.com, linux-security-module@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] apparmor: remove unused variable

On 1/21/25 22:55, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The local 'sock' variable has become unused after a change to the
> aa_sock_file_perm() calling conventions:
> 
> security/apparmor/file.c: In function '__file_sock_perm':
> security/apparmor/file.c:544:24: error: unused variable 'sock' [-Werror=unused-variable]
>    544 |         struct socket *sock = (struct socket *) file->private_data;
> 
> Remove it here.
> 
> Fixes: c05e705812d1 ("apparmor: add fine grained af_unix mediation")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

yeah, unfortunately Nathan beat you by a few hours with
   [PATCH] apparmor: remove unused variable

and since I am walking the backlog in time order I pulled his version of the patch.

All the same thanks for taking the time to fix this, it is much appreciated

john

> ---
>   security/apparmor/file.c | 3 ---
>   1 file changed, 3 deletions(-)
> 
> diff --git a/security/apparmor/file.c b/security/apparmor/file.c
> index 85f89814af1e..e3a858649942 100644
> --- a/security/apparmor/file.c
> +++ b/security/apparmor/file.c
> @@ -541,11 +541,8 @@ static int __file_sock_perm(const char *op, const struct cred *subj_cred,
>   			    struct aa_label *flabel, struct file *file,
>   			    u32 request, u32 denied)
>   {
> -	struct socket *sock = (struct socket *) file->private_data;
>   	int error;
>   
> -	AA_BUG(!sock);
> -
>   	/* revalidation due to label out of date. No revocation at this time */
>   	if (!denied && aa_label_is_subset(flabel, label))
>   		return 0;