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Subject: Re: [PATCH] security/apparmor/label.c: Clean code by removing
 redundant instructions
To:     mateusznosek0@gmail.com, linux-kernel@vger.kernel.org,
        linux-security-module@vger.kernel.org
Cc:     serge@hallyn.com, jmorris@namei.org
References: <20200303183023.32004-1-mateusznosek0@gmail.com>
From:   John Johansen <john.johansen@canonical.com>
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Organization: Canonical
Message-ID: <e73b378a-acf0-0669-9e06-6633b5b25f86@canonical.com>
Date:   Tue, 3 Mar 2020 10:40:44 -0800
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On 3/3/20 10:30 AM, mateusznosek0@gmail.com wrote:
> From: Mateusz Nosek <mateusznosek0@gmail.com>
> 
> Previously 'label->proxy->label' value checking
> and conditional reassigning were done twice in the same function.
> The second one is redundant and can be removed.
> 
> Signed-off-by: Mateusz Nosek <mateusznosek0@gmail.com>
Acked-by: John Johansen <john.johansen@canonical.com>

I will pull this into apparmor-next


> ---
>  security/apparmor/label.c | 6 ------
>  1 file changed, 6 deletions(-)
> 
> diff --git a/security/apparmor/label.c b/security/apparmor/label.c
> index ba3987242282..676eebcbfd68 100644
> --- a/security/apparmor/label.c
> +++ b/security/apparmor/label.c
> @@ -311,8 +311,6 @@ int aa_vec_unique(struct aa_profile **vec, int n, int flags)
>  
>  static void label_destroy(struct aa_label *label)
>  {
> -	struct aa_label *tmp;
> -
>  	AA_BUG(!label);
>  
>  	if (!label_isprofile(label)) {
> @@ -333,10 +331,6 @@ static void label_destroy(struct aa_label *label)
>  
>  	aa_free_secid(label->secid);
>  
> -	tmp = rcu_dereference_protected(label->proxy->label, true);
> -	if (tmp == label)
> -		rcu_assign_pointer(label->proxy->label, NULL);
> -
>  	aa_put_proxy(label->proxy);
>  	label->proxy = (struct aa_proxy *) PROXY_POISON + 1;
>  }
>