From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on
 sparc
Date: Thu, 12 Jan 2017 15:41:43 -0500 (EST)
Message-ID: <20170112.154143.1940764507974590907.davem@davemloft.net>
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Cc: eric.dumazet@gmail.com, rob.gardner@oracle.com,
        netdev@vger.kernel.org, sparclinux@vger.kernel.org,
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To: shannon.nelson@oracle.com
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From: Shannon Nelson <shannon.nelson@oracle.com>
Date: Thu, 12 Jan 2017 12:30:38 -0800

> On 1/12/2017 12:25 PM, Eric Dumazet wrote:
>> On Thu, 2017-01-12 at 13:15 -0700, Rob Gardner wrote:
>>
>>>
>>> I suspect that someplace, somebody is casting val to an int * or
>>> something like that.
>>
>> Then that would be the bug. Can we root cause this please ?
>>
>>
> 
> Look in net/ipv4/tcp_fastopen.c:tcp_fastopen_cookie_gen() for the line
> 
> 	 struct in6_addr *buf = (struct in6_addr *) tmp.val;

Oh yeah, that's it.  I didn't notice that at all.