Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on sparc

[David Miller]

From: Shannon Nelson <shannon.nelson@xxxxxxxxxx>
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.