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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 C0CD7C2BB9A for ; Tue, 15 Dec 2020 03:09:24 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 69C90224D4 for ; Tue, 15 Dec 2020 03:09:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 69C90224D4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 089158D0022; Mon, 14 Dec 2020 22:09:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 039768D001C; Mon, 14 Dec 2020 22:09:23 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E91AA8D0022; Mon, 14 Dec 2020 22:09:23 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0236.hostedemail.com [216.40.44.236]) by kanga.kvack.org (Postfix) with ESMTP id CC81E8D001C for ; Mon, 14 Dec 2020 22:09:23 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 9743B181AEF30 for ; Tue, 15 Dec 2020 03:09:23 +0000 (UTC) X-FDA: 77594035806.30.son49_3d0238827420 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 7D4E8180B3AB8 for ; Tue, 15 Dec 2020 03:09:23 +0000 (UTC) X-HE-Tag: son49_3d0238827420 X-Filterd-Recvd-Size: 2882 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf37.hostedemail.com (Postfix) with ESMTP for ; Tue, 15 Dec 2020 03:09:22 +0000 (UTC) Date: Mon, 14 Dec 2020 19:09:21 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1608001762; bh=+cnU01wpNcdZaSKB5BOp0RFt4kfrmI4wSp5hHh4aN8A=; h=From:To:Subject:In-Reply-To:From; b=AW86rxBhxWXb7L+EpoFflGpR9bUml2nq1IRMghrHQhycRIxdizp+e4S62CAxbm6ss Uvu9N4PE9jAfEo8xLjE2QML0VQs3+VdJQT8Ei/cFzn9gzqg91zYL4Ms9A+5UwBOdxT 4khaSGNuqBQz2zBVDsiWt8ykxKg6/SDRHMHStCtI= From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, aryabinin@virtuozzo.com, corbet@lwn.net, dvyukov@google.com, elver@google.com, glider@google.com, jiangshanlai@gmail.com, linux-mm@kvack.org, matthias.bgg@gmail.com, mm-commits@vger.kernel.org, tj@kernel.org, torvalds@linux-foundation.org, walter-zh.wu@mediatek.com Subject: [patch 104/200] kasan: update documentation for generic kasan Message-ID: <20201215030921.0oB6skPrH%akpm@linux-foundation.org> In-Reply-To: <20201214190237.a17b70ae14f129e2dca3d204@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: Walter Wu Subject: kasan: update documentation for generic kasan Generic KASAN also supports to record the last two workqueue stacks and print them in KASAN report. So that need to update documentation. Link: https://lkml.kernel.org/r/20201203023037.30792-1-walter-zh.wu@mediatek.com 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 Cc: Lai Jiangshan Cc: Matthias Brugger Cc: Tejun Heo Signed-off-by: Andrew Morton --- Documentation/dev-tools/kasan.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/Documentation/dev-tools/kasan.rst~kasan-update-documentation-for-generic-kasan +++ a/Documentation/dev-tools/kasan.rst @@ -190,8 +190,9 @@ function calls GCC directly inserts the 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 ~~~~~~~~~~~~~~~~~~~~~~~~ _