From: Pravin Shelar <pshelar@nicira.com>
To: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Cc: David Miller <davem@davemloft.net>,
Daniel Borkmann <dborkman@redhat.com>,
netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH] net: gre: don't pull skb if dealing with icmp message
Date: Sun, 19 Jan 2014 13:08:58 -0800 [thread overview]
Message-ID: <CALnjE+qtB4fEw4HdUZy6nXU6gSAjeSCiBn0EaQR9o_d2SY3yNQ@mail.gmail.com> (raw)
In-Reply-To: <52DB8E4A.7050809@cn.fujitsu.com>
On Sun, Jan 19, 2014 at 12:35 AM, Duan Jiong <duanj.fnst@cn.fujitsu.com> wrote:
>
> When dealing with icmp messages, the skb->data points the
> ip header that triggered the sending of the icmp message.
>
> In gre_cisco_err(), the parse_gre_header() is called, and the
> iptunnel_pull_header() is called to pull the skb at the end of
> the parse_gre_header(). Unfortunately, the ipgre_err still needs
> the skb->data points the ip header following the icmp layer,
> and those ip addresses in ip header will be used to look up
> tunnel by ip_tunnel_lookup().
>
This looks like bug.
Can you use ip_hdr() rather than skb->data in ipgre_err().
Same is done in ipgre_rcv().
next prev parent reply other threads:[~2014-01-19 21:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-19 8:35 [PATCH] net: gre: don't pull skb if dealing with icmp message Duan Jiong
2014-01-19 21:08 ` Pravin Shelar [this message]
2014-01-20 1:37 ` Duan Jiong
2014-01-21 18:27 ` Pravin Shelar
2014-01-22 0:49 ` David Miller
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