linux-kernel - Re: [PATCH 4.9.y] Revert "net: sit: fix memory leak in sit_init

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Message-ID: <20191016183027.GC801860@kroah.com>
Date:   Wed, 16 Oct 2019 11:30:27 -0700
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Ajay Kaher <akaher@...are.com>, Mao Wenan <maowenan@...wei.com>
Cc:     davem@...emloft.net, kuznet@....inr.ac.ru, jmorris@...ei.org,
        yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        srivatsab@...are.com, srivatsa@...il.mit.edu, amakhalov@...are.com,
        srinidhir@...are.com, bvikas@...are.com, anishs@...are.com,
        vsirnapalli@...are.com, srostedt@...are.com,
        Mao Wenan <maowenan@...wei.com>
Subject: Re: [PATCH 4.9.y] Revert "net: sit: fix memory leak in
 sit_init_net()"

On Wed, Oct 16, 2019 at 02:33:54PM +0530, Ajay Kaher wrote:
> This reverts commit 375d6d454a95ebacb9c6eb0b715da05a4458ffef which is
> commit 07f12b26e21ab359261bf75cfcb424fdc7daeb6d upstream.
> 
> Unnecessarily calling free_netdev() from sit_init_net().
> ipip6_dev_free() of 4.9.y called free_netdev(), so no need
> to call again after ipip6_dev_free().
> 
> Cc: Mao Wenan <maowenan@...wei.com>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Ajay Kaher <akaher@...are.com>
> ---
>  net/ipv6/sit.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
> index 47ca2a2..16eba7b 100644
> --- a/net/ipv6/sit.c
> +++ b/net/ipv6/sit.c
> @@ -1856,7 +1856,6 @@ static int __net_init sit_init_net(struct net *net)
>  
>  err_reg_dev:
>  	ipip6_dev_free(sitn->fb_tunnel_dev);
> -	free_netdev(sitn->fb_tunnel_dev);
>  err_alloc_dev:
>  	return err;
>  }
> -- 
> 2.7.4
> 

Mao, are you ok with this change?

thanks,

greg k-h