netdev - Re: [PATCH net] net: vxlan: fix crash when interface is created with no group

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Message-Id: <20140318.232027.1528407849060824608.davem@davemloft.net>
Date:	Tue, 18 Mar 2014 23:20:27 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	mike.rapoport@...ellosystems.com
Cc:	or.gerlitz@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net] net: vxlan: fix crash when interface is created
 with no group

From: Mike Rapoport <mike.rapoport@...ellosystems.com>
Date: Tue, 18 Mar 2014 17:51:23 +0200

> On Tue, Mar 18, 2014 at 5:10 PM, Or Gerlitz <or.gerlitz@...il.com> wrote:
>> On Mon, Mar 17, 2014 at 1:17 PM, Mike Rapoport
>> <mike.rapoport@...ellosystems.com> wrote:
>>> If the vxlan interface is created without group definition, there is a
>>> panic on the first packet reception:
>>>
>>> $ ip link add dev vxlan0 type vxlan id 1
>>> $ ip addr add dev vxlan0 10.0.0.1/24
>>> $ ip link set up dev vxlan0
>>>
>>>   BUG: unable to handle kernel paging request at 0000000100000103
>>>   IP: [<ffffffff8143435b>] ipv6_rcv+0xfa/0x399
>>
>> Hi Mike,
>>
>> So this bug/fix is for 3.14 and also earlier kernels?
> 
> I think the bug was introduced by addition of ipv6 to vxlan, which was
> merged in 3.12.

How did this code behave before ipv6 support was added?
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