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Date:	Sat, 18 Oct 2014 13:07:36 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	roy.qing.li@...il.com
Cc:	netdev@...r.kernel.org, weichunc@...mgrid.com
Subject: Re: [PATCH] ipv4: fix a potential use after free in gre_offload.c

From: roy.qing.li@...il.com
Date: Sat, 18 Oct 2014 17:26:04 +0800

> From: Li RongQing <roy.qing.li@...il.com>
> 
> pskb_may_pull() may change skb->data and make greh pointer oboslete;
> so need to reassign greh;
> but since first calling pskb_may_pull already ensured that skb->data
> has enough space for greh, so move the reference of greh before second
> calling pskb_may_pull(), to avoid reassign greh.
> 
> Fixes: 7a7ffbabf9("ipv4: fix tunneled VM traffic over hw VXLAN/GRE GSO NIC")
> Cc: Wei-Chun Chao <weichunc@...mgrid.com>
> Signed-off-by: Li RongQing <roy.qing.li@...il.com>

Applied.
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