linux-kernel - Re: [PATCH v2 0/2] x86/mm/KASLR: Fix the wrong size of memory sections

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Date:   Mon, 15 Apr 2019 09:39:45 -0500
From:   Kees Cook <keescook@...omium.org>
To:     Baoquan He <bhe@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Garnier <thgarnie@...gle.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Mike Travis <mike.travis@....com>, frank.ramsay@....com,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: Re: [PATCH v2 0/2] x86/mm/KASLR: Fix the wrong size of memory sections

On Fri, Apr 12, 2019 at 1:55 AM Baoquan He <bhe@...hat.com> wrote:
>
> v1->v2:
>   Rewrite log of the two patches. No functionality change.
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> v1 background:
> The fixes for these two bugs were carried in the earlier patchset, patch
> 4/6 and patch 5/6:
>
> [PATCH v4 0/6] Several patches to fix code bugs, improve documents and clean up
> http://lkml.kernel.org/r/20190314094645.4883-1-bhe@redhat.com
>
> Later, Thomas suggested posting bug fixing patches separately from those
> clean up patches. So send both of them in a separate patchset.
>
> For another bug fix patch 6/6, it happened on SGI UV system. Mike and
> Frank have sent a machine with cards to our lab and loaned to me, I am
> still debugging and discussing with Mike about the verification.
>
> Baoquan He (2):
>   x86/mm/KASLR: Fix the size of the direct mapping section
>   x86/mm/KASLR: Fix the size of vmemmap section

These fixes look sane to me. Thanks for solving this!

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

>
>  arch/x86/mm/kaslr.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
>
> --
> 2.17.2
>


-- 
Kees Cook