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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 749FFC388F7 for ; Thu, 5 Nov 2020 22:03:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1DAF120728 for ; Thu, 5 Nov 2020 22:03:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604613813; bh=yfxqBAJW6/shUdb+BnOHVcqxW2ysmnc9li46q11PNN8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=kzziRhFGqHXHgpUJkz3pJrmBfQbGCtP1++ahB9Ufs9za++n5224vV1V0xzFr0mOof yTaDlwC+EgeAp4lv9rZUOALo2LVuyn+2BYFW/lUDeNChNdokmaepySl/lTpBVr3tDC MXkW3z+7s3pWFBTJbPgA6YoLHd/kI8mu0sqGkIdY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732685AbgKEWDa (ORCPT ); Thu, 5 Nov 2020 17:03:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:59860 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731508AbgKEWD0 (ORCPT ); Thu, 5 Nov 2020 17:03:26 -0500 Received: from paulmck-ThinkPad-P72.home (50-39-104-11.bvtn.or.frontiernet.net [50.39.104.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 44E202078E; Thu, 5 Nov 2020 22:03:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604613805; bh=yfxqBAJW6/shUdb+BnOHVcqxW2ysmnc9li46q11PNN8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ztmRX1PhJRcwmcT0VroP/YFjzquVUgXDwWVJlWl360EK2EY5EyNN+983LwBWZ+f0w 92qm6908xX68IEAeHUTZk8DeHy1DP6vi68ISiof81GyK+AvRQhn71vh0wZcMFWfEfr JBiH4Eh+yJIFWwxAB+UxjYXpcnbTGTUKfhqtYre4= From: paulmck@kernel.org To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kernel-team@fb.com, mingo@kernel.org Cc: elver@google.com, andreyknvl@google.com, glider@google.com, dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com, "Paul E . McKenney" Subject: [PATCH kcsan 1/3] kcsan: selftest: Ensure that address is at least PAGE_SIZE Date: Thu, 5 Nov 2020 14:03:22 -0800 Message-Id: <20201105220324.15808-1-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20201105220302.GA15733@paulmck-ThinkPad-P72> References: <20201105220302.GA15733@paulmck-ThinkPad-P72> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marco Elver In preparation of supporting only addresses not within the NULL page, change the selftest to never use addresses that are less than PAGE_SIZE. Reviewed-by: Dmitry Vyukov Signed-off-by: Marco Elver Signed-off-by: Paul E. McKenney --- kernel/kcsan/selftest.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c index d98bc20..9014a3a 100644 --- a/kernel/kcsan/selftest.c +++ b/kernel/kcsan/selftest.c @@ -33,6 +33,9 @@ static bool test_encode_decode(void) unsigned long addr; prandom_bytes(&addr, sizeof(addr)); + if (addr < PAGE_SIZE) + addr = PAGE_SIZE; + if (WARN_ON(!check_encodable(addr, size))) return false; -- 2.9.5