netdev - Re: Crash in CIPSO_V4_TAG

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Date:	Tue, 17 Jul 2012 10:28:34 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	paul@...l-moore.com
Cc:	mlin@...pku.edu.cn, alan@...rguk.ukuu.org.uk,
	netdev@...r.kernel.org
Subject: Re: Crash in CIPSO_V4_TAG_LOCAL handling

From: Paul Moore <paul@...l-moore.com>
Date: Tue, 17 Jul 2012 12:25:28 -0400

> On Sat, Jul 14, 2012 at 4:08 PM, David Miller <davem@...emloft.net> wrote:
>> From: Lin Ming <mlin@...pku.edu.cn>
>> Date: Sun, 15 Jul 2012 01:22:30 +0800
>>
>>> It's caused by below code added in commit 15c45f7b.
>>>
>>>                 case CIPSO_V4_TAG_LOCAL:
>>>                         /* This is a non-standard tag that we only allow for
>>>                          * local connections, so if the incoming interface is
>>>                          * not the loopback device drop the packet. */
>>>                         if (!(skb->dev->flags & IFF_LOOPBACK)) {
>>>                                 err_offset = opt_iter;
>>>                                 goto validate_return_locked;
>>>                         }
>>
>> Paul please fix this, as shown 'skb' can easily be NULL in this
>> code path.
> 
> Just saw this ... I'll start looking into this today.

Thanks, sorry I messed up your email, I should have checked MAINTAINERS :)
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