linux-kernel - Re: [PATCH backport pre-4.9] powerpc/slb: Force a full SLB flush when we insert for a bad EA

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Message-ID: <87fuekdh3s.fsf@concordia.ellerman.id.au>
Date:   Wed, 28 Jun 2017 11:40:55 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "stable\@vger.kernel.org" <stable@...r.kernel.org>,
        "linuxppc-dev\@lists.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH backport pre-4.9] powerpc/slb: Force a full SLB flush when we insert for a bad EA

Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
> On Thu, Jun 22, 2017 at 04:52:51PM +1000, Michael Ellerman wrote:
>> The SLB miss handler calls slb_allocate_realmode() in order to create an
>> SLB entry for the faulting address. At the very start of that function
>> we check that the faulting Effective Address (EA) is less than
>> PGTABLE_RANGE (ignoring the region), ie. is it an address which could
>> possibly fit in the virtual address space.
...
>> ---
>>  arch/powerpc/mm/slb_low.S | 10 ++++++++++
>>  1 file changed, 10 insertions(+)
>> 
>> Note this patch is not upstream. The bug fix was fixed differently in
>> upstream prior to the bug being identified.
>
> Now applied to 4.4 and 3.18-stable kernels, thanks,

Thanks.

cheers