From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04877C433F5 for ; Thu, 30 Dec 2021 19:19:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 90E7E6B00C5; Thu, 30 Dec 2021 14:19:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8BE076B00C7; Thu, 30 Dec 2021 14:19:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 786496B00C8; Thu, 30 Dec 2021 14:19:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0213.hostedemail.com [216.40.44.213]) by kanga.kvack.org (Postfix) with ESMTP id 69C586B00C5 for ; Thu, 30 Dec 2021 14:19:13 -0500 (EST) Received: from smtpin31.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 2B3C78249980 for ; Thu, 30 Dec 2021 19:19:13 +0000 (UTC) X-FDA: 78975423786.31.75E020C Received: from mail-io1-f50.google.com (mail-io1-f50.google.com [209.85.166.50]) by imf08.hostedemail.com (Postfix) with ESMTP id 09A39160007 for ; Thu, 30 Dec 2021 19:19:01 +0000 (UTC) Received: by mail-io1-f50.google.com with SMTP id o7so28820525ioo.9 for ; Thu, 30 Dec 2021 11:19:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=DUj31a0vWo3+lEkWZ+Adl6dlbYeVbADGrJgYxEnUpUg=; b=mbg/EqmGC4aKsDVdK+LUwUmyuc8RJbrhQq7fn5O/VePmeXQxMEt4E2QMXeAsvIwjq3 qF6t+DKdExmjPyMrouBwqZOQJqa5b1kbDFye72VO+jcsL3RNqd+sKUNJ7UJEL0fu787s +d2d0EVglT//LUZQ2sGy3DVYIkNtImWqumqekWT2ydDz47FaV294nvXPm9lE2ue1/QdE JOw9/fi6sR+vXltb8tWq+ZNMsjmUOafqJ7QOizA/1xWtpjRhkAfCwzcTCOWRuIWkYaUY Lfsn848MsXSY9UrLAR/WZRj5s9qEy5URi5cpQJbmPfF7s0PJyW+wrpzS6S/P0KaUlLx+ TakQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=DUj31a0vWo3+lEkWZ+Adl6dlbYeVbADGrJgYxEnUpUg=; b=tKB3kGCSLBBEnV2eou4YTUbmmQPObuQTvnNowUuRP2NF5YZrzlfzbQFAJmLQu04VLF t4eisV62TFma+E2Vm+l9sm75Qb17Pk3F3NgyL0CMQaMwro+zO9y/fgbaAR8BML+5t4hf tmbzwtgPAm/oXVzBIEHXuxJ4Jje8pthHDLO4ic+Xrw/MMRGDXyJh1ui8wZyI478UTjZW YOXCdV8xAYhiXApn1WJ3SgT+0Yjo58E8b/KrxsIKHSwjt4OvQx9oNMG4JGXbb5Xyknzp Mu1GPq2VbLtJqAYbMdXeCtc16n/HiicieXuL3OWlIilmNH2dl9MsghcHSvFNXZaaPqfQ /lqA== X-Gm-Message-State: AOAM532Q3KlmCX7pBaR3MiTZNdAVSWZ9TELfpA5BWSALxU9UlJOK6mMo 0Lq0xcbvjsJVQkLksSzjbbpRFlMe2/PETk4ac8A= X-Google-Smtp-Source: ABdhPJxihgVqz3Jf8c6xjbs24o35Y/OGcfau8t919A9kb5IZPmf4DcDe2qcv+0r86e2Yaeo/TW3QxXTqc5chjXCQn1Y= X-Received: by 2002:a05:6638:2404:: with SMTP id z4mr9960690jat.9.1640891952203; Thu, 30 Dec 2021 11:19:12 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Andrey Konovalov Date: Thu, 30 Dec 2021 20:19:01 +0100 Message-ID: Subject: Re: [PATCH mm v5 00/39] kasan, vmalloc, arm64: add vmalloc tagging support for SW/HW_TAGS To: Andrew Morton Cc: Marco Elver , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev , Linux Memory Management List , Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , Linux ARM , Peter Collingbourne , Evgenii Stepanov , LKML , Andrey Konovalov , andrey.konovalov@linux.dev Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 09A39160007 X-Stat-Signature: 8ienas8z5b7gq1ggq1fsua3735c4ybob Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b="mbg/EqmG"; spf=pass (imf08.hostedemail.com: domain of andreyknvl@gmail.com designates 209.85.166.50 as permitted sender) smtp.mailfrom=andreyknvl@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-HE-Tag: 1640891941-361780 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 Thu, Dec 30, 2021 at 8:12 PM wrote: > > From: Andrey Konovalov > > Hi, > > This patchset adds vmalloc tagging support for SW_TAGS and HW_TAGS > KASAN modes. > > The tree with patches is available here: > > https://github.com/xairy/linux/tree/up-kasan-vmalloc-tags-v5-akpm > > About half of patches are cleanups I went for along the way. None of > them seem to be important enough to go through stable, so I decided > not to split them out into separate patches/series. > > The patchset is partially based on an early version of the HW_TAGS > patchset by Vincenzo that had vmalloc support. Thus, I added a > Co-developed-by tag into a few patches. > > SW_TAGS vmalloc tagging support is straightforward. It reuses all of > the generic KASAN machinery, but uses shadow memory to store tags > instead of magic values. Naturally, vmalloc tagging requires adding > a few kasan_reset_tag() annotations to the vmalloc code. > > HW_TAGS vmalloc tagging support stands out. HW_TAGS KASAN is based on > Arm MTE, which can only assigns tags to physical memory. As a result, > HW_TAGS KASAN only tags vmalloc() allocations, which are backed by > page_alloc memory. It ignores vmap() and others. > > Thanks! Hi Andrew, Could you PTAL and consider taking this into mm? Thanks!