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Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic()

From Michael Ellerman <mpe@ellerman.id.au>
Newsgroups linux.kernel
Subject Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic()
Date 2016-08-05 11:40 +0200
Message-ID <s2JLH-5EJ-23@gated-at.bofh.it> (permalink)
References <s1Gwy-3Wp-49@gated-at.bofh.it> <s2hZ8-3uE-5@gated-at.bofh.it> <s2ktX-5fC-7@gated-at.bofh.it> <s2HgR-40X-9@gated-at.bofh.it> <s2HJU-4rz-25@gated-at.bofh.it>
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Christophe Leroy <christophe.leroy@c-s.fr> writes:

> Le 05/08/2016 à 08:57, Michael Ellerman a écrit :
>> Alessio Igor Bogani <alessio.bogani@elettra.eu> writes:
>>> On 4 August 2016 at 05:53, Scott Wood <oss@buserror.net> wrote:
>>>> On Tue, 2016-08-02 at 10:07 +0200, Christophe Leroy wrote:
>>>>> commit 7aef4136566b0 ("powerpc32: rewrite csum_partial_copy_generic()
>>>>> based on copy_tofrom_user()") introduced a bug when destination
>>>>> address is odd and initial csum is not null
>>>>>
>
> The purpose of this patch was not to address Alessio's issue, but to fix 
> a huge issue on checksum calculation which induces breakdown of TCP 
> connections.
>
> I think it is worth commiting it upstream and on impacted stable 
> releases, allthought we don't have yet identified the issue Alessio's has.

OK. I'll put it back into fixes on Monday if I haven't heard anything
further.

cheers

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Thread

[PATCH v2] powerpc/32: fix csum_partial_copy_generic() Christophe Leroy <christophe.leroy@c-s.fr> - 2016-08-02 14:00 +0200
  Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Segher Boessenkool <segher@kernel.crashing.org> - 2016-08-02 15:40 +0200
  Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Segher Boessenkool <segher@kernel.crashing.org> - 2016-08-02 16:40 +0200
  Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Scott Wood <oss@buserror.net> - 2016-08-04 06:00 +0200
    Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Alessio Igor Bogani <alessio.bogani@elettra.eu> - 2016-08-04 08:40 +0200
      Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Michael Ellerman <mpe@ellerman.id.au> - 2016-08-05 09:00 +0200
        Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Christophe Leroy <christophe.leroy@c-s.fr> - 2016-08-05 09:30 +0200
          Re: [PATCH v2] powerpc/32: fix csum_partial_copy_generic() Michael Ellerman <mpe@ellerman.id.au> - 2016-08-05 11:40 +0200
  Re: [v2] powerpc/32: fix csum_partial_copy_generic() Michael Ellerman <patch-notifications@ellerman.id.au> - 2016-08-10 21:50 +0200

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