netdev - Re: [PATCH net-next] 8021q: fix a potential use-after-free

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Message-ID: <1364051766.4431.86.camel@edumazet-glaptop>
Date:	Sat, 23 Mar 2013 08:16:06 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next] 8021q: fix a potential use-after-free

On Sat, 2013-03-23 at 13:14 +0800, Cong Wang wrote:
> From: Cong Wang <amwang@...hat.com>
> 
> vlan_vid_del() could possibly free ->vlan_info after a RCU grace
> period, however, we may still refer to the freed memory area
> by 'grp' pointer. Found by code inspection.
> 
> This patch moves vlan_vid_del() as behind as possible.
> 
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: "David S. Miller" <davem@...emloft.net>
> Signed-off-by: Cong Wang <amwang@...hat.com>
> ---
>  net/8021q/vlan.c |   14 +++++++-------
>  1 files changed, 7 insertions(+), 7 deletions(-)

Acked-by: Eric Dumazet <edumazet@...gle.com>


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