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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 F1E5AC433DB for ; Thu, 21 Jan 2021 16:43:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A17F23A22 for ; Thu, 21 Jan 2021 16:43:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388165AbhAUQnb (ORCPT ); Thu, 21 Jan 2021 11:43:31 -0500 Received: from foss.arm.com ([217.140.110.172]:41158 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387897AbhAUQlp (ORCPT ); Thu, 21 Jan 2021 11:41:45 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1F8111596; Thu, 21 Jan 2021 08:40:04 -0800 (PST) Received: from e119884-lin.cambridge.arm.com (e119884-lin.cambridge.arm.com [10.1.196.72]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6D3BC3F68F; Thu, 21 Jan 2021 08:40:02 -0800 (PST) From: Vincenzo Frascino To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Cc: Vincenzo Frascino , Catalin Marinas , Will Deacon , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Branislav Rankov , Andrey Konovalov Subject: [PATCH v5 6/6] kasan: Forbid kunit tests when async mode is enabled Date: Thu, 21 Jan 2021 16:39:43 +0000 Message-Id: <20210121163943.9889-7-vincenzo.frascino@arm.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210121163943.9889-1-vincenzo.frascino@arm.com> References: <20210121163943.9889-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Architectures supported by KASAN_HW_TAGS can provide a sync or async mode of execution. KASAN KUNIT tests can be executed only when sync mode is enabled. Forbid the execution of the KASAN KUNIT tests when async mode is enabled. Cc: Dmitry Vyukov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Andrey Konovalov Signed-off-by: Vincenzo Frascino --- lib/test_kasan.c | 5 +++++ mm/kasan/kasan.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index 7285dcf9fcc1..1306f707b4fe 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -52,6 +52,11 @@ static int kasan_test_init(struct kunit *test) return -1; } + if (!hw_is_mode_sync()) { + kunit_err(test, "can't run KASAN tests in async mode"); + return -1; + } + multishot = kasan_save_enable_multi_shot(); hw_set_tagging_report_once(false); return 0; diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 3923d9744105..3464113042ab 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -296,6 +296,7 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag) #define hw_enable_tagging_sync() arch_enable_tagging_sync() #define hw_enable_tagging_async() arch_enable_tagging_async() +#define hw_is_mode_sync() arch_is_mode_sync() #define hw_init_tags(max_tag) arch_init_tags(max_tag) #define hw_set_tagging_report_once(state) arch_set_tagging_report_once(state) #define hw_get_random_tag() arch_get_random_tag() @@ -306,6 +307,7 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag) #define hw_enable_tagging_sync() #define hw_enable_tagging_async() +#define hw_is_mode_sync() #define hw_set_tagging_report_once(state) #endif /* CONFIG_KASAN_HW_TAGS */ -- 2.30.0