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 X-Spam-Level: X-Spam-Status: No, score=-20.4 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 22BF2C388F9 for ; Thu, 22 Oct 2020 13:19:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8E9A2417D for ; Thu, 22 Oct 2020 13:19:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FFBTC951" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2899543AbgJVNTn (ORCPT ); Thu, 22 Oct 2020 09:19:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2899491AbgJVNTi (ORCPT ); Thu, 22 Oct 2020 09:19:38 -0400 Received: from mail-wr1-x449.google.com (mail-wr1-x449.google.com [IPv6:2a00:1450:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53438C0613CE for ; Thu, 22 Oct 2020 06:19:38 -0700 (PDT) Received: by mail-wr1-x449.google.com with SMTP id f11so611393wro.15 for ; Thu, 22 Oct 2020 06:19:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=hz6KTz5FwSVcKdBcrWKk1T0dlNcGWPgygtgKcp7KEb8=; b=FFBTC951UmrhzpM9y+uLT8ZyOJj5GaA4k7AAgHlI5bzWx5afJoz6OzMm5XOyKBSXEM 33gEVoauyorNsYP0Q+ECaBpvPq/DZsJ5GgUIr7AP8JaxkCXd6/ck44zNbrnvejRmGtPt EHfugNeWva1kLDKx2Qx1nxAVs6bGYzf2jmT6eIkENmOIa53fxT0rEq/NEicFsH/oNwGr kyZxIJNVaHioOKRiM7oaMAGLtWsmEWjRiP1xlZvhqFVIvyiM18wlBZsZyxxnH1h+QpZD MTSh30CAWNtQXA81JdLugm9ci6jQbTia/3CdNk9dj5LNdLvS1N9838gPFioY0FC54Psv Ekjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=hz6KTz5FwSVcKdBcrWKk1T0dlNcGWPgygtgKcp7KEb8=; b=RGAsjX/oPCxczP9QcVm2cnBv5xHKROQK98GvtSlS7lOiRmeJ5AfWguA0zEwQ2wgIhd cOr3alXFKrkWVVPNGgVtmN6OZtNH6tmIBQaWzV2MKp/V1ZS+FjiTUKW8b9Lx6CKXxZ9L W6nHvfFnI/GB7Kb4kyy0S3riDS8uWxztFLyjkSW2ULCXKlBQ2KqOjYbLCAkeWV0jO+2L bsikLyMGjh5uvFxnvnsVvJA9ERDpb9LxP3K7mWJNh72eCnji+TMRMhS7n9H3rKi1o3Pv FYhBE1gev9S32JY+kQS2BDlGFIPxVXKQSOC1mVU+iZSQx/ZFlcnrkPgLNDlQaLQAufu5 sc7w== X-Gm-Message-State: AOAM533g/H/pO/8ebR2/5TITQ7a6tVywNmwNM6DOYNMVoIFq2MKPjaJW jwLew5IFqwQGVQkkxXqLdvTO4KsPNuwDvynf X-Google-Smtp-Source: ABdhPJx5O4kSUaBGwRtLvKusVioF7tY95svs/rFufga7Cd+WWBIpFFtwb4jM57egcfFrxBGA7vCl5k+pvkZDaTLZ Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a05:6000:108:: with SMTP id o8mr2676067wrx.256.1603372776882; Thu, 22 Oct 2020 06:19:36 -0700 (PDT) Date: Thu, 22 Oct 2020 15:18:57 +0200 In-Reply-To: Message-Id: <1049f02fb4132390a6a314eb21dccfe5500e69d6.1603372719.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.0.rc1.297.gfa9743e501-goog Subject: [PATCH RFC v2 05/21] kasan: allow VMAP_STACK for HW_TAGS mode From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver Cc: Evgenii Stepanov , Kostya Serebryany , Peter Collingbourne , Serban Constantinescu , Andrey Ryabinin , Elena Petrova , Branislav Rankov , Kevin Brodsky , Andrew Morton , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Even though hardware tag-based mode currently doesn't support checking vmalloc allocations, it doesn't use shadow memory and works with VMAP_STACK as is. Signed-off-by: Andrey Konovalov Link: https://linux-review.googlesource.com/id/I3552cbc12321dec82cd7372676e9372a2eb452ac --- arch/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/Kconfig b/arch/Kconfig index af14a567b493..3caf7bcdcf93 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -868,7 +868,7 @@ config VMAP_STACK default y bool "Use a virtually-mapped stack" depends on HAVE_ARCH_VMAP_STACK - depends on !KASAN || KASAN_VMALLOC + depends on !(KASAN_GENERIC || KASAN_SW_TAGS) || KASAN_VMALLOC help Enable this if you want the use virtually-mapped kernel stacks with guard pages. This causes kernel stack overflows to be -- 2.29.0.rc1.297.gfa9743e501-goog