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=-14.4 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,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no 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 19301C43465 for ; Fri, 18 Sep 2020 10:39:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CEE4321D24 for ; Fri, 18 Sep 2020 10:39:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bZzEE8ST" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726280AbgIRKjw (ORCPT ); Fri, 18 Sep 2020 06:39:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726009AbgIRKjv (ORCPT ); Fri, 18 Sep 2020 06:39:51 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 692F4C06174A for ; Fri, 18 Sep 2020 03:39:51 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id 67so3215369pgd.12 for ; Fri, 18 Sep 2020 03:39:51 -0700 (PDT) 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=0BA74pq9Zk+EY0B+5KtILBM++vfiF9LClb1TtG0VGMg=; b=bZzEE8ST+6WycOr5Rst39I67wilv5k5SvyGkHPsn3mRhe7ruYp7AzIfSmSL5YMy4+J r+dGj4oYaHC1ALs8NiHp/twhAU0qUWSNOATnubN3m21ylxDXxcTqxofc3KPTdKZad1WQ IEHIsCsDpbojqgbChTdgpPxyX+MWPJEX92ERMR2ZEIEyGhcMVmzM4smWPMNyiYGGdwkj ly6cdPI8/Wsd16ztLensD3N8jRUmelx6HviINExWraokAC0MFiMos0HLdnF9XbWcMUjN RXQqO8k2yiR1wbncuo2s7NM5dEqmzgEaMXaZ1YFX+WAUrMd96adcYIW9Sj0ekeZZli91 q2ig== 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=0BA74pq9Zk+EY0B+5KtILBM++vfiF9LClb1TtG0VGMg=; b=Uy9Em2dvpkX+vjK7BC0hAk4/ZOHNnPZLI27SpvQ2PSvUWzGRCpDRgr9jugl4/AGeKt wUQFGrylfkQBi10osn/P5yjwHNZIWi2k/JtYOqyySaB6NMAEJLnBgbOTsDaM1MUPCb6g F/4GHIPgRo0TXgMlX0LORvC9sZuOSboaM7LYCvYyNdhKl9emH3erXC/E8LqB5ID1gOKV gywWDTViCEIOHrdSphW5aH7zkXDQnoFjjRGAz6BwoQsafHnVwhW8vUIZmgrSehsUJ6hY H2uPg6gc8tq051Hi710uwL58GlSno8+c4KeP2YgGKD4BmXgipcanMbibdZd5ll2r+L8U /k3A== X-Gm-Message-State: AOAM532d+/kS2ZdFsYLQSrX0CyYGxU9CA4mkXiYNsIerkG8FwAl3G3oE /O42E3lXNM66KwFbdW+6SMIAQosp67mDBCIZrBOV8A== X-Google-Smtp-Source: ABdhPJxsNJ1/ALFvU9Viq7TgmQqLSQxHS+99JGvGaazSkYkpuVJz6AGEjcS6JGjChCrWVe3VKznLhUu3jPZIQtmbWro= X-Received: by 2002:a62:ee10:0:b029:142:2501:3972 with SMTP id e16-20020a62ee100000b029014225013972mr14985432pfi.55.1600425590587; Fri, 18 Sep 2020 03:39:50 -0700 (PDT) MIME-Version: 1.0 References: <88c275dc4eef13c8bcbe74ecec661733dcbc67b8.1600204505.git.andreyknvl@google.com> In-Reply-To: From: Andrey Konovalov Date: Fri, 18 Sep 2020 12:39:39 +0200 Message-ID: Subject: Re: [PATCH v2 07/37] kasan: split out shadow.c from common.c To: Alexander Potapenko Cc: Dmitry Vyukov , Vincenzo Frascino , Catalin Marinas , kasan-dev , Andrey Ryabinin , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , 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 Fri, Sep 18, 2020 at 10:17 AM Alexander Potapenko wrote: > > > diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c > > new file mode 100644 > > index 000000000000..4888084ecdfc > > --- /dev/null > > +++ b/mm/kasan/shadow.c > > @@ -0,0 +1,509 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * This file contains KASAN shadow runtime code. > > I think it will be nice to mention here which KASAN modes are going to > use this file. Will do in v3. > > +#undef memset > > +void *memset(void *addr, int c, size_t len) > > +{ > > + if (!check_memory_region((unsigned long)addr, len, true, _RET_IP_)) > > + return NULL; > > + > > + return __memset(addr, c, len); > > +} > > + > > OOC, don't we need memset and memmove implementations in the > hardware-based mode as well? Hardware mode uses native memset implementation as all memory access instructions are checked by the hardware anyway. > > + region_start = ALIGN(start, PAGE_SIZE * KASAN_GRANULE_SIZE); > > + region_end = ALIGN_DOWN(end, PAGE_SIZE * KASAN_GRANULE_SIZE); > > "PAGE_SIZE * KASAN_GRANULE_SIZE" seems to be a common thing, can we > give it a name? This patch just moves the already existing code, but I can fix this in a separate patch. 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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 Fri, Sep 18, 2020 at 10:17 AM Alexander Potapenko wrote: > > > diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c > > new file mode 100644 > > index 000000000000..4888084ecdfc > > --- /dev/null > > +++ b/mm/kasan/shadow.c > > @@ -0,0 +1,509 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * This file contains KASAN shadow runtime code. > > I think it will be nice to mention here which KASAN modes are going to > use this file. Will do in v3. > > +#undef memset > > +void *memset(void *addr, int c, size_t len) > > +{ > > + if (!check_memory_region((unsigned long)addr, len, true, _RET_IP_)) > > + return NULL; > > + > > + return __memset(addr, c, len); > > +} > > + > > OOC, don't we need memset and memmove implementations in the > hardware-based mode as well? Hardware mode uses native memset implementation as all memory access instructions are checked by the hardware anyway. > > + region_start = ALIGN(start, PAGE_SIZE * KASAN_GRANULE_SIZE); > > + region_end = ALIGN_DOWN(end, PAGE_SIZE * KASAN_GRANULE_SIZE); > > "PAGE_SIZE * KASAN_GRANULE_SIZE" seems to be a common thing, can we > give it a name? This patch just moves the already existing code, but I can fix this in a separate patch. 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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=0BA74pq9Zk+EY0B+5KtILBM++vfiF9LClb1TtG0VGMg=; b=MCTT5NGpLf907ZNuL4d5Gd78tPio7sPWuzARVm5tb6XVQtyyXoMFgxdlwHTzlYFUTz Hnswk8IgbgMYD95qcyFh6XGXbAIqSvjJZuGbpI2+13CsKC5dxEuEEVYagKijijhqAbPb fWnVgjXgMKhAYpfoVSY1dsl+0/5CY6Uh81F5zTCMs9+J1Eqrw0mdXVej4dR6f+aV9Q3C j5oKeZoWfkzBQlgxuEH7LQg+7jTbCfjInXmA7nBZodBI5YJQejlUYMv8LH9v+jtIABq8 QMzOL6SaX5sw9jlPtklXxzEhEAImE5LQHBkiDquazruvn6vqjbSfsCQ5ebOn9zfzJpY4 ek9A== X-Gm-Message-State: AOAM530tPMqp5OiUG0xw7UG/UKOUmNARBrf5qtm1WrjtBhGAI7NQ/w6A oneIOjXC9I3hTEDW+3p0JF0CVUBMck4b7aGNnPXD0Q== X-Google-Smtp-Source: ABdhPJxsNJ1/ALFvU9Viq7TgmQqLSQxHS+99JGvGaazSkYkpuVJz6AGEjcS6JGjChCrWVe3VKznLhUu3jPZIQtmbWro= X-Received: by 2002:a62:ee10:0:b029:142:2501:3972 with SMTP id e16-20020a62ee100000b029014225013972mr14985432pfi.55.1600425590587; Fri, 18 Sep 2020 03:39:50 -0700 (PDT) MIME-Version: 1.0 References: <88c275dc4eef13c8bcbe74ecec661733dcbc67b8.1600204505.git.andreyknvl@google.com> In-Reply-To: From: Andrey Konovalov Date: Fri, 18 Sep 2020 12:39:39 +0200 Message-ID: Subject: Re: [PATCH v2 07/37] kasan: split out shadow.c from common.c To: Alexander Potapenko X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200918_063955_026135_A1CA51EF X-CRM114-Status: GOOD ( 20.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux ARM , Marco Elver , Elena Petrova , Catalin Marinas , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev , LKML , Linux Memory Management List , Evgenii Stepanov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Sep 18, 2020 at 10:17 AM Alexander Potapenko wrote: > > > diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c > > new file mode 100644 > > index 000000000000..4888084ecdfc > > --- /dev/null > > +++ b/mm/kasan/shadow.c > > @@ -0,0 +1,509 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * This file contains KASAN shadow runtime code. > > I think it will be nice to mention here which KASAN modes are going to > use this file. Will do in v3. > > +#undef memset > > +void *memset(void *addr, int c, size_t len) > > +{ > > + if (!check_memory_region((unsigned long)addr, len, true, _RET_IP_)) > > + return NULL; > > + > > + return __memset(addr, c, len); > > +} > > + > > OOC, don't we need memset and memmove implementations in the > hardware-based mode as well? Hardware mode uses native memset implementation as all memory access instructions are checked by the hardware anyway. > > + region_start = ALIGN(start, PAGE_SIZE * KASAN_GRANULE_SIZE); > > + region_end = ALIGN_DOWN(end, PAGE_SIZE * KASAN_GRANULE_SIZE); > > "PAGE_SIZE * KASAN_GRANULE_SIZE" seems to be a common thing, can we > give it a name? This patch just moves the already existing code, but I can fix this in a separate patch. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel