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, 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 9A692C433DB for ; Tue, 12 Jan 2021 08:05:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 22B50224BD for ; Tue, 12 Jan 2021 08:05:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 22B50224BD Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9B82A8D0070; Tue, 12 Jan 2021 03:05:08 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 989928D0051; Tue, 12 Jan 2021 03:05:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 830B38D0070; Tue, 12 Jan 2021 03:05:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0128.hostedemail.com [216.40.44.128]) by kanga.kvack.org (Postfix) with ESMTP id 682DF8D0051 for ; Tue, 12 Jan 2021 03:05:08 -0500 (EST) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 313B0362B for ; Tue, 12 Jan 2021 08:05:08 +0000 (UTC) X-FDA: 77696387496.29.love99_251147527513 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin29.hostedemail.com (Postfix) with ESMTP id 1230C180868CE for ; Tue, 12 Jan 2021 08:05:08 +0000 (UTC) X-HE-Tag: love99_251147527513 X-Filterd-Recvd-Size: 4673 Received: from mail-qk1-f181.google.com (mail-qk1-f181.google.com [209.85.222.181]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Tue, 12 Jan 2021 08:05:07 +0000 (UTC) Received: by mail-qk1-f181.google.com with SMTP id h4so1169005qkk.4 for ; Tue, 12 Jan 2021 00:05:07 -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=BO9LKMYm6WLALY7iBHQnXtdADoInL5KOrbTeEAsVWyI=; b=YlV263n9tQpbBt9fnNBpy7Qa2HIPPIYUSnUvNbLEDrYwVNxX7ckWG3jSQ76sjL0JtW lbwVttNbrBHqTjUZcF5soBSH5wQbg65dZg83dq7YFsi09CLZqXpSbRYUDIwkjNS0Cbd4 JXqv9fo4bW6zfG88NRnCEYX41fgpnmHHTVSkIsu+snmHRoE73B2cTyUuNQSZUmfcYmld pKQ13QosGGuoDL/HUbK4+TGUMghPluqwdlDtM0fCbtOVUQ4dUdmlpnsPHAX+J4ysHOEj oS6qQ5b/21tUVcWmgV4ivS1gHVM8B2Qw57AqK6A4afHthAuxaOlnib5OnhsXshRBmicy jt0Q== 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=BO9LKMYm6WLALY7iBHQnXtdADoInL5KOrbTeEAsVWyI=; b=FPti3VkV3RIPycqrzaeyGPN/wVFXtRAVYk2bqX1z5EnR4j9y0s1jsUprzJQcqImE00 4qJ4JzMGhqWDs9meEEZRavWlTt6t3nfllschh+JeY6oESYu9kuhEvY9yjnkDNF1Mc2uD BlFXvQzTCjCwYZIWjaTsMWLSaVLEYVGXQ9uZVeU8HzVQcnrDJOM97ieZLKNiuBS72nfo EFw2/OBY7TVFRgMkGtf2rSRbQRco8fVG2wisnE6NiAdpuawdfBJzdToJcsuYrjH6aKzu jzJKzjzljZ4R10r03+yb+cyXrYfKJW//rncipEk/hlTZuQicjtXf9GIPtfmyw/U7G5+/ l0/w== X-Gm-Message-State: AOAM533pmwReWRfpyVeowETg8vtMjoTpkm5dRJNDnN0C4AzFPNswmdyX ofFVkV8ysdHcIxW692Xq+qyN8lspQd4UJR4mlOP9UA== X-Google-Smtp-Source: ABdhPJytD4AOfbdRca3VhmhiAQah4iu6fANU1SAhqXePfE31XsBQ0cGQMkpRI2P0lsUBLRJoPGMc5vyUmKWLTdteiSc= X-Received: by 2002:a37:a747:: with SMTP id q68mr3277569qke.352.1610438706711; Tue, 12 Jan 2021 00:05:06 -0800 (PST) MIME-Version: 1.0 References: <0f20f867d747b678604a68173a5f20fb8df9b756.1609871239.git.andreyknvl@google.com> In-Reply-To: <0f20f867d747b678604a68173a5f20fb8df9b756.1609871239.git.andreyknvl@google.com> From: Alexander Potapenko Date: Tue, 12 Jan 2021 09:04:54 +0100 Message-ID: Subject: Re: [PATCH 04/11] kasan: add match-all tag tests To: Andrey Konovalov 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" 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 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?