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

From David Miller <davem@davemloft.net>
Newsgroups linux.kernel
Subject Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on sparc
Date 2017-01-12 21:50 +0100
Message-ID <sYUtP-8we-3@gated-at.bofh.it> (permalink)
References <sYU0O-8mC-17@gated-at.bofh.it> <sYUau-8pV-15@gated-at.bofh.it> <sYUka-8sU-31@gated-at.bofh.it>
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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.

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Thread

[PATCH] tcp: fix tcp_fastopen unaligned access complaints on sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 21:00 +0100
  Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 21:20 +0100
    Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Rob Gardner <rob.gardner@oracle.com> - 2017-01-12 21:20 +0100
      Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 21:30 +0100
        Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 21:40 +0100
        Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 21:40 +0100
          Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 21:50 +0100
            Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 22:00 +0100
              Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 22:20 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 22:40 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 22:50 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 23:00 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 23:00 +0100

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