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Thu, 5 Nov 2020 17:33:21 +0000 (UTC) IronPort-SDR: f61J7rXjfjdr0Q+iBwGeBSR+nRh1+EtnN47BUBjK5c6gjqtdsyxsJfFiGz8JIElxMyFNRHuCGc 9C+Z9fFV5zdQ== X-IronPort-AV: E=McAfee;i="6000,8403,9796"; a="254131969" X-IronPort-AV: E=Sophos;i="5.77,454,1596524400"; d="scan'208";a="254131969" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2020 09:33:19 -0800 IronPort-SDR: UoYvpUCRtit2U3ERfv2jvz5vGj/5imUc49uYzVWjMjG20KvhuTCbAYih/wTMzWdKKmr/WWl2+B N9Otp7ZgjhZw== X-IronPort-AV: E=Sophos;i="5.77,454,1596524400"; d="scan'208";a="539496877" Received: from ryarzada-mobl.amr.corp.intel.com (HELO [10.209.19.108]) ([10.209.19.108]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Nov 2020 09:33:17 -0800 Subject: Re: [PATCH v40 10/24] mm: Add 'mprotect' hook to struct vm_operations_struct To: Borislav Petkov , Jarkko Sakkinen Cc: x86@kernel.org, linux-sgx@vger.kernel.org, linux-kernel@vger.kernel.org, Sean Christopherson , linux-mm@kvack.org, Andrew Morton , Matthew Wilcox , Jethro Beekman , Darren Kenny , andriy.shevchenko@linux.intel.com, asapek@google.com, cedric.xing@intel.com, chenalexchen@google.com, conradparker@google.com, cyhanish@google.com, haitao.huang@intel.com, kai.huang@intel.com, kai.svahn@intel.com, kmoy@google.com, ludloff@google.com, luto@kernel.org, nhorman@redhat.com, npmccallum@redhat.com, puiterwijk@redhat.com, rientjes@google.com, tglx@linutronix.de, yaozhangx@google.com, mikko.ylinen@intel.com, Mel Gorman References: <20201104145430.300542-1-jarkko.sakkinen@linux.intel.com> <20201104145430.300542-11-jarkko.sakkinen@linux.intel.com> <20201105160424.GC25636@zn.tnic> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20201105160424.GC25636@zn.tnic> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 dri= ver. >> >> Cc: linux-mm@kvack.org >> Cc: Andrew Morton >> Cc: Matthew Wilcox >> Acked-by: Jethro Beekman >> Reviewed-by: Darren Kenny >> Signed-off-by: Sean Christopherson >> Co-developed-by: Jarkko Sakkinen >> Signed-off-by: Jarkko Sakkinen >> --- >> 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 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