netdev - Re: [PATCH 1/3] random: replace custom notifier chain with standard one

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Wed, 2 Mar 2022 06:33:38 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        netdev@...r.kernel.org, Alexander Graf <graf@...zon.com>,
        Jann Horn <jannh@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Theodore Ts'o <tytso@....edu>
Subject: Re: [PATCH 1/3] random: replace custom notifier chain with standard
 one

Am Wed, Mar 02, 2022 at 12:10:36AM +0100 schrieb Jason A. Donenfeld:
>  /*
>   * Delete a previously registered readiness callback function.
>   */
> -void del_random_ready_callback(struct random_ready_callback *rdy)
> +int unregister_random_ready_notifier(struct notifier_block *nb)
>  {
>  	unsigned long flags;
> -	struct module *owner = NULL;
> -
> -	spin_lock_irqsave(&random_ready_list_lock, flags);
> -	if (!list_empty(&rdy->list)) {
> -		list_del_init(&rdy->list);
> -		owner = rdy->owner;
> -	}
> -	spin_unlock_irqrestore(&random_ready_list_lock, flags);
> +	int ret;
>  
> -	module_put(owner);
> +	spin_lock_irqsave(&random_ready_chain_lock, flags);
> +	ret = raw_notifier_chain_unregister(&random_ready_chain, nb);
> +	spin_unlock_irqrestore(&random_ready_chain_lock, flags);
> +	return ret;
>  }
> -EXPORT_SYMBOL(del_random_ready_callback);

That doesn't seem to be used anywhere, so I'd suggest removing this function
altogether.

Otherwise:
	Reviewed-by: Dominik Brodowski <linux@...inikbrodowski.net>