linux-kernel - Re: [PATCH] [2.6.22] Fix a potential NULL pointer dereference in free_shared

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Message-ID: <469BE988.6090907@pobox.com>
Date:	Mon, 16 Jul 2007 17:56:24 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Micah Gruber <micah.gruber@...il.com>
CC:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] [2.6.22] Fix a potential NULL pointer dereference in
 free_shared_mem() in drivers/net/s2io.c

Micah Gruber wrote:
> This patch fixes a potential null dereference bug where we dereference
> nic before a null check. This patch simply moves the dereferencing
> after the null check.
> 
> Signed-off-by: Micah Gruber < micah.gruber@...il.com>
> 
> --- a/drivers/net/s2io.c
> +++ b/drivers/net/s2io.c
> @@ -789,12 +789,14 @@
>        struct mac_info *mac_control;
>        struct config_param *config;
>        int lst_size, lst_per_page;
> -       struct net_device *dev = nic->dev;
> +       struct net_device *dev;
>        int page_num = 0;
> 
>        if (!nic)
>                return;
> 
> +       dev = nic->dev;
> +

applied manually -- all of your patch attempts produced corrupted patches :/


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