linux-kernel - Re: [PATCH] modules, lock around setting of MODULE_STATE

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Message-ID: <20141008143743.GA4835@redhat.com>
Date:	Wed, 8 Oct 2014 16:37:43 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-kernel@...r.kernel.org, Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH] modules, lock around setting of MODULE_STATE_UNFORMED

On 10/08, Prarit Bhargava wrote:
>
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -1842,7 +1842,9 @@ static void free_module(struct module *mod)
>  
>  	/* We leave it in list to prevent duplicate loads, but make sure
>  	 * that noone uses it while it's being deconstructed. */
> +	mutex_lock(&module_mutex);
>  	mod->state = MODULE_STATE_UNFORMED;
> +	mutex_unlock(&module_mutex);
>  
>  	/* Remove dynamic debug info */
>  	ddebug_remove_module(mod->name);

Reviewed-by: Oleg Nesterov <oleg@...hat.com>

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