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Thu, 11 Jul 2019 10:00:27 -0700 (PDT) Received: from [10.67.49.31] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id r13sm7233865pfr.25.2019.07.11.10.00.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jul 2019 10:00:27 -0700 (PDT) Subject: Re: [PATCH v6 0/6] KASan for arm To: Linus Walleij , Florian Fainelli , Arnd Bergmann Cc: Linux ARM , bcm-kernel-feedback-list , Alexander Potapenko , Dmitry Vyukov , Jonathan Corbet , Russell King , christoffer.dall@arm.com, Marc Zyngier , Nicolas Pitre , Vladimir Murzin , Kees Cook , jinb.park7@gmail.com, Alexandre Belloni , Ard Biesheuvel , Daniel Lezcano , Philippe Ombredanne , liuwenliang@huawei.com, Rob Landley , Greg KH , Andrew Morton , Mark Rutland , Catalin Marinas , Masahiro Yamada , Thomas Gleixner , thgarnie@google.com, David Howells , Geert Uytterhoeven , Andre Przywara , julien.thierry@arm.com, drjones@redhat.com, philip@cog.systems, mhocko@suse.com, kirill.shutemov@linux.intel.com, kasan-dev@googlegroups.com, Linux Doc Mailing List , "linux-kernel@vger.kernel.org" , kvmarm@lists.cs.columbia.edu, Andrey Ryabinin References: <20190617221134.9930-1-f.fainelli@gmail.com> From: Florian Fainelli Openpgp: preference=signencrypt Autocrypt: addr=florian.fainelli@broadcom.com; prefer-encrypt=mutual; keydata= mQENBFPAG8ABCAC3EO02urEwipgbUNJ1r6oI2Vr/+uE389lSEShN2PmL3MVnzhViSAtrYxeT M0Txqn1tOWoIc4QUl6Ggqf5KP6FoRkCrgMMTnUAINsINYXK+3OLe7HjP10h2jDRX4Ajs4Ghs JrZOBru6rH0YrgAhr6O5gG7NE1jhly+EsOa2MpwOiXO4DE/YKZGuVe6Bh87WqmILs9KvnNrQ PcycQnYKTVpqE95d4M824M5cuRB6D1GrYovCsjA9uxo22kPdOoQRAu5gBBn3AdtALFyQj9DQ KQuc39/i/Kt6XLZ/RsBc6qLs+p+JnEuPJngTSfWvzGjpx0nkwCMi4yBb+xk7Hki4kEslABEB AAG0MEZsb3JpYW4gRmFpbmVsbGkgPGZsb3JpYW4uZmFpbmVsbGlAYnJvYWRjb20uY29tPokB xAQQAQgArgUCXJvPrRcKAAG/SMv+fS3xUQWa0NryPuoRGjsA3SAUAAAAAAAWAAFrZXktdXNh Z2UtbWFza0BwZ3AuY29tjDAUgAAAAAAgAAdwcmVmZXJyZWQtZW1haWwtZW5jb2RpbmdAcGdw LmNvbXBncG1pbWUICwkIBwMCAQoFF4AAAAAZGGxkYXA6Ly9rZXlzLmJyb2FkY29tLmNvbQUb AwAAAAMWAgEFHgEAAAAEFQgJCgAKCRCBMbXEKbxmoE4DB/9JySDRt/ArjeOHOwGA2sLR1DV6 Mv6RuStiefNvJ14BRfMkt9EV/dBp9CsI+slwj9/ZlBotQXlAoGr4uivZvcnQ9dWDjTExXsRJ WcBwUlSUPYJc/kPWFnTxF8JFBNMIQSZSR2dBrDqRP0UWYJ5XaiTbVRpd8nka9BQu4QB8d/Bx VcEJEth3JF42LSF9DPZlyKUTHOj4l1iZ/Gy3AiP9jxN50qol9OT37adOJXGEbix8zxoCAn2W +grt1ickvUo95hYDxE6TSj4b8+b0N/XT5j3ds1wDd/B5ZzL9fgBjNCRzp8McBLM5tXIeTYu9 mJ1F5OW89WvDTwUXtT19P1r+qRqKuQENBFPAG8EBCACsa+9aKnvtPjGAnO1mn1hHKUBxVML2 C3HQaDp5iT8Q8A0ab1OS4akj75P8iXYfZOMVA0Lt65taiFtiPT7pOZ/yc/5WbKhsPE9dwysr vHjHL2gP4q5vZV/RJduwzx8v9KrMZsVZlKbvcvUvgZmjG9gjPSLssTFhJfa7lhUtowFof0fA q3Zy+vsy5OtEe1xs5kiahdPb2DZSegXW7DFg15GFlj+VG9WSRjSUOKk+4PCDdKl8cy0LJs+r W4CzBB2ARsfNGwRfAJHU4Xeki4a3gje1ISEf+TVxqqLQGWqNsZQ6SS7jjELaB/VlTbrsUEGR 1XfIn/sqeskSeQwJiFLeQgj3ABEBAAGJAkEEGAECASsFAlPAG8IFGwwAAADAXSAEGQEIAAYF AlPAG8EACgkQk2AGqJgvD1UNFQgAlpN5/qGxQARKeUYOkL7KYvZFl3MAnH2VeNTiGFoVzKHO e7LIwmp3eZ6GYvGyoNG8cOKrIPvXDYGdzzfwxVnDSnAE92dv+H05yanSUv/2HBIZa/LhrPmV hXKgD27XhQjOHRg0a7qOvSKx38skBsderAnBZazfLw9OukSnrxXqW/5pe3mBHTeUkQC8hHUD Cngkn95nnLXaBAhKnRfzFqX1iGENYRH3Zgtis7ZvodzZLfWUC6nN8LDyWZmw/U9HPUaYX8qY MP0n039vwh6GFZCqsFCMyOfYrZeS83vkecAwcoVh8dlHdke0rnZk/VytXtMe1u2uc9dUOr68 7hA+Z0L5IQAKCRCBMbXEKbxmoLoHCACXeRGHuijOmOkbyOk7x6fkIG1OXcb46kokr2ptDLN0 Ky4nQrWp7XBk9ls/9j5W2apKCcTEHONK2312uMUEryWI9BlqWnawyVL1LtyxLLpwwsXVq5m5 sBkSqma2ldqBu2BHXZg6jntF5vzcXkqG3DCJZ2hOldFPH+czRwe2OOsiY42E/w7NUyaN6b8H rw1j77+q3QXldOw/bON361EusWHdbhcRwu3WWFiY2ZslH+Xr69VtYAoMC1xtDxIvZ96ps9ZX pUPJUqHJr8QSrTG1/zioQH7j/4iMJ07MMPeQNkmj4kGQOdTcsFfDhYLDdCE5dj5WeE6fYRxE Q3up0ArDSP1L Message-ID: <0ba50ae2-be09-f633-ab1f-860e8b053882@broadcom.com> Date: Thu, 11 Jul 2019 10:00:18 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/2/19 2:06 PM, Linus Walleij wrote: > Hi Florian, > > On Tue, Jun 18, 2019 at 12:11 AM Florian Fainelli wrote: > >> Abbott submitted a v5 about a year ago here: >> >> and the series was not picked up since then, so I rebased it against >> v5.2-rc4 and re-tested it on a Brahma-B53 (ARMv8 running AArch32 mode) >> and Brahma-B15, both LPAE and test-kasan is consistent with the ARM64 >> counter part. >> >> We were in a fairly good shape last time with a few different people >> having tested it, so I am hoping we can get that included for 5.4 if >> everything goes well. > > Thanks for picking this up. I was trying out KASan in the past, > got sidetracked and honestly lost interest a bit because it was > boring. But I do realize that it is really neat, so I will try to help > out with some review and test on a bunch of hardware I have. > > At one point I even had this running on the ARMv4 SA1100 > (no joke!) and if I recall correctly, I got stuck because of things > that might very well have been related to using a very fragile > Arm testchip that later broke down completely in the l2cache > when we added the spectre/meltdown fixes. A blast from the past! > > I start reviewing and testing. Great, thanks a lot for taking a look. FYI, I will be on holiday from July 19th till August 12th, if you think you have more feedback between now and then, I can try to pick it up and submit a v7 with that feedback addressed, or it will happen when I return, or you can pick it up if you refer, all options are possible! @Arnd, should we squash your patches in as well? -- Florian