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=-23.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 D0497C433E0 for ; Tue, 12 Jan 2021 18:11:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83CD222DFA for ; Tue, 12 Jan 2021 18:11:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728868AbhALSLB (ORCPT ); Tue, 12 Jan 2021 13:11:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726262AbhALSLB (ORCPT ); Tue, 12 Jan 2021 13:11:01 -0500 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1F9DC061575 for ; Tue, 12 Jan 2021 10:10:20 -0800 (PST) Received: by mail-pj1-x1034.google.com with SMTP id m5so2197941pjv.5 for ; Tue, 12 Jan 2021 10:10:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=A5gCy8U+Pj2XIzaMO6G08RY3MnWe8pOVDCWwBl512KM=; b=JM8ZOsGVvKGolIXNKKqJXO4fSUXqRXcDqfKUHqakGtuZlVqbFpX/kvF7gXEJLioRm6 bkdxnwLdyc4LxUR53ZvnExAvqFRisvdkSmMAGLPw5oZxobOeozsNcYrLaE+9RLHP8ABg corlflIjxXBJtTxmlBd51pOmCgGDIJEiFmGvCHFxP8UONRghM0oCn8VZocKn2hrgGz7W qDngkPPCI6eetFRRsXcf48CHulOrr6lr0YJX2NxKhboyY+VHoMe6vt10G5v32VqWzhNv ybIJA2gIh/uFwwh6wNSwsuzxNvtf72dnav6Bk8DWl74kmEHjJaDB7vrOhl66O0JnTZ0C naXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=A5gCy8U+Pj2XIzaMO6G08RY3MnWe8pOVDCWwBl512KM=; b=DN4fC6sm/Xnut7DVnIkVz74y26ikD/nUO7tWCm/Gf6LFEZsM2MJB5h8mtGtJPd7JUN 7s08CvIU0BIfiXPSphe0wVyBWoZkFBkUh4OQxYcomjLrtH1wsh27d4LmdOnVceMQtCHC vP/d8BqXSCx57SypSwlSDy5Im0gAxKEn1OKE9bGtrfNhkGRqxqFSFafUfKW7swr6933N 89+W0jwP2eikmatS/do8bMCLzb8ThhQwTJYLg2RQ3LEttz71ls+1R6hBIYhPeffiJHKB Ca4DQ5OOVREmsGt4Ae9U2wX3Xb2pw7RjatoT/fw89QSYEKR7KgKf8wFdbwd9Tu+MG3/5 QJCw== X-Gm-Message-State: AOAM530otyvY+DUfLYLxLz1ryRVxgApnRZpjygl7Q/buottUJ18/3Pj7 HRdoGfTEQsCQdB2SfTde0Vw/Pl5jkS8dY+FY4AbIYQ== X-Google-Smtp-Source: ABdhPJxzA1kproFmWSJpV4LbwVmJvr7ytGhhiBUePjWacRL/+tb3Ft5R9ssk9pZnQ1ncNtMgQnnwHf6RLWbxxIcjmdE= X-Received: by 2002:a17:902:c144:b029:dc:292e:a8a1 with SMTP id 4-20020a170902c144b02900dc292ea8a1mr376024plj.13.1610475020053; Tue, 12 Jan 2021 10:10:20 -0800 (PST) MIME-Version: 1.0 References: <0f20f867d747b678604a68173a5f20fb8df9b756.1609871239.git.andreyknvl@google.com> In-Reply-To: From: Andrey Konovalov Date: Tue, 12 Jan 2021 19:10:09 +0100 Message-ID: Subject: Re: [PATCH 04/11] kasan: add match-all tag tests To: Alexander Potapenko Cc: Catalin Marinas , Vincenzo Frascino , Dmitry Vyukov , Marco Elver , Andrew Morton , Will Deacon , Andrey Ryabinin , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev , Linux ARM , Linux Memory Management List , LKML Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021 at 9:05 AM Alexander Potapenko wrote: > > On Tue, Jan 5, 2021 at 7:28 PM Andrey Konovalov wrote: > > > > Add 3 new tests for tag-based KASAN modes: > > > > 1. Check that match-all pointer tag is not assigned randomly. > > 2. Check that 0xff works as a match-all pointer tag. > > 3. Check that there are no match-all memory tags. > > > > Note, that test #3 causes a significant number (255) of KASAN reports > > to be printed during execution for the SW_TAGS mode. > > > > Signed-off-by: Andrey Konovalov > > Link: https://linux-review.googlesource.com/id/I78f1375efafa162b37f3abcb2c5bc2f3955dfd8e > > --- > > lib/test_kasan.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++ > > mm/kasan/kasan.h | 6 ++++ > > 2 files changed, 99 insertions(+) > > > > diff --git a/lib/test_kasan.c b/lib/test_kasan.c > > index 46e578c8e842..f1eda0bcc780 100644 > > --- a/lib/test_kasan.c > > +++ b/lib/test_kasan.c > > @@ -13,6 +13,7 @@ > > #include > > #include > > #include > > +#include > > #include > > #include > > #include > > @@ -790,6 +791,95 @@ static void vmalloc_oob(struct kunit *test) > > vfree(area); > > } > > > > +/* > > + * Check that match-all pointer tag is not assigned randomly for > > + * tag-based modes. > > + */ > > +static void match_all_not_assigned(struct kunit *test) > > +{ > > Do we want to run this test in non-tag-based modes? Probably not? Will fix in v2, thanks!