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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,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 2CB27C6369E for ; Thu, 3 Dec 2020 02:31:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF15E22203 for ; Thu, 3 Dec 2020 02:31:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729566AbgLCCbn (ORCPT ); Wed, 2 Dec 2020 21:31:43 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:56517 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1725859AbgLCCbm (ORCPT ); Wed, 2 Dec 2020 21:31:42 -0500 X-UUID: 6f5e8fa78bb74a52827525f34941024e-20201203 X-UUID: 6f5e8fa78bb74a52827525f34941024e-20201203 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 205625155; Thu, 03 Dec 2020 10:31:00 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 3 Dec 2020 10:30:37 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 3 Dec 2020 10:30:38 +0800 From: Walter Wu To: Andrew Morton , Jonathan Corbet , Marco Elver , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrey Konovalov , Matthias Brugger CC: , , , , wsd_upstream , , Walter Wu Subject: [PATCH v5 4/4] kasan: update documentation for generic kasan Date: Thu, 3 Dec 2020 10:30:37 +0800 Message-ID: <20201203023037.30792-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Generic KASAN also supports to record the last two workqueue stacks and print them in KASAN report. So that need to update documentation. Signed-off-by: Walter Wu Suggested-by: Marco Elver Acked-by: Marco Elver Reviewed-by: Dmitry Vyukov Reviewed-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Jonathan Corbet --- v4: - remove timer stack description v3: - Thanks for Marco suggestion --- Documentation/dev-tools/kasan.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index c09c9ca2ff1c..3cb556ceb4a5 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -190,8 +190,9 @@ function calls GCC directly inserts the code to check the shadow memory. This option significantly enlarges kernel but it gives x1.1-x2 performance boost over outline instrumented kernel. -Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one -and the second to last. +Generic KASAN also reports the last 2 call stacks to creation of work that +potentially has access to an object. Call stacks for the following are shown: +call_rcu() and workqueue queuing. Software tag-based KASAN ~~~~~~~~~~~~~~~~~~~~~~~~ -- 2.18.0