linux-kernel - Re: [PATCH v40 10/24] mm: Add 'mprotect' hook to struct vm_operations

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Date:   Thu, 5 Nov 2020 09:33:17 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Borislav Petkov <bp@...en8.de>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     x86@...nel.org, linux-sgx@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jethro Beekman <jethro@...tanix.com>,
        Darren Kenny <darren.kenny@...cle.com>,
        andriy.shevchenko@...ux.intel.com, asapek@...gle.com,
        cedric.xing@...el.com, chenalexchen@...gle.com,
        conradparker@...gle.com, cyhanish@...gle.com,
        haitao.huang@...el.com, kai.huang@...el.com, kai.svahn@...el.com,
        kmoy@...gle.com, ludloff@...gle.com, luto@...nel.org,
        nhorman@...hat.com, npmccallum@...hat.com, puiterwijk@...hat.com,
        rientjes@...gle.com, tglx@...utronix.de, yaozhangx@...gle.com,
        mikko.ylinen@...el.com, Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH v40 10/24] mm: Add 'mprotect' hook to struct
 vm_operations_struct

On 11/5/20 8:04 AM, Borislav Petkov wrote:
...
>> Add a vm_ops->mprotect() hook so that mprotect() operations which are
>> inconsistent with any page's stashed intent can be rejected by the driver.
>>
>> Cc: linux-mm@...ck.org
>> Cc: Andrew Morton <akpm@...ux-foundation.org>
>> Cc: Matthew Wilcox <willy@...radead.org>
>> Acked-by: Jethro Beekman <jethro@...tanix.com>
>> Reviewed-by: Darren Kenny <darren.kenny@...cle.com>
>> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
>> Co-developed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>> ---
>>  include/linux/mm.h | 3 +++
>>  mm/mprotect.c      | 5 ++++-
>>  2 files changed, 7 insertions(+), 1 deletion(-)
> This needs an ACK from an mm person.

For what it's worth:

Acked-by: Dave Hansen <dave.hansen@...el.com>

The top 5 git-blamees in terms of mprotect.c at the moment are:

     45 Andi Kleen
     50 Peter Xu
     81 Dave Hansen
     90 Mel Gorman
    209 Linus Torvalds