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=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 CD0E0C433E0 for ; Fri, 7 Aug 2020 06:25:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9ADEA22CAF for ; Fri, 7 Aug 2020 06:25:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781516; bh=8CjMLXFFHhtLj2yQweCyzaJNsenCOeQjrrOCzvB9ho0=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=fBaZ5BdWYKo4QXbtHZTfME/vukh7UeurkUyJ+gG4N7ecp/WeWjNEo/TU+mV/7QXC2 QjU5SpE3+pDkbw1fVEiY16D1RRTmtknJNt5OI/lXs+1q8fnabZBbAtcvdZh3vLsulq Ya+uQs1SF1KeUmCsQWUvqsB5sYnMpSZW3KWW20c8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726401AbgHGGZP (ORCPT ); Fri, 7 Aug 2020 02:25:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:34072 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726634AbgHGGZO (ORCPT ); Fri, 7 Aug 2020 02:25:14 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6824F22CAE; Fri, 7 Aug 2020 06:25:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596781514; bh=8CjMLXFFHhtLj2yQweCyzaJNsenCOeQjrrOCzvB9ho0=; h=Date:From:To:Subject:In-Reply-To:From; b=h7pRKnuxvUB4QC/1o2vjaV4SyeQWpLW7cm7Lda1YUy7xvRcOUrxhUgnkRR9nHZo1c UF1fiNZU2deH1POoDEOaQXGmMqE8Rv8SHYpv63gIltrUhVLYKd+rhpyTlziD8MagyJ oJWv1xFo9ITUJXZObr9tciPdOv8+mX3YVAdm3ASI= Date: Thu, 06 Aug 2020 23:25:12 -0700 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, ardb@kernel.org, aryabinin@virtuozzo.com, catalin.marinas@arm.com, dvyukov@google.com, elver@google.com, glider@google.com, lenaptr@google.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vincenzo.frascino@arm.com, walter-zh.wu@mediatek.com Subject: [patch 140/163] kasan: adjust kasan_stack_oob for tag-based mode Message-ID: <20200807062512.e9NsWHHeg%akpm@linux-foundation.org> In-Reply-To: <20200806231643.a2711a608dd0f18bff2caf2b@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Andrey Konovalov Subject: kasan: adjust kasan_stack_oob for tag-based mode Use OOB_TAG_OFF as access offset to land the access into the next granule. Link: http://lkml.kernel.org/r/403b259f1de49a7a3694531c851ac28326a586a8.1596199677.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/3063ab1411e92bce36061a96e25b651212e70ba6.1596544734.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Suggested-by: Walter Wu Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Catalin Marinas Cc: Dmitry Vyukov Cc: Elena Petrova Cc: Marco Elver Cc: Vincenzo Frascino Cc: Ard Biesheuvel Signed-off-by: Andrew Morton --- lib/test_kasan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/lib/test_kasan.c~kasan-adjust-kasan_stack_oob-for-tag-based-mode +++ a/lib/test_kasan.c @@ -488,7 +488,7 @@ static noinline void __init kasan_global static noinline void __init kasan_stack_oob(void) { char stack_array[10]; - volatile int i = 0; + volatile int i = OOB_TAG_OFF; char *p = &stack_array[ARRAY_SIZE(stack_array) + i]; pr_info("out-of-bounds on stack\n"); _