From patchwork Mon Jun 1 05:11:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walter Wu X-Patchwork-Id: 11581251 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 094191391 for ; Mon, 1 Jun 2020 05:21:26 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 94286206E2 for ; Mon, 1 Jun 2020 05:21:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rJj//cDx"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="D4y2Wt2k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94286206E2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=PbLx3y5vWY813qKvEiClLiCgUta1EFL6ioodlBysRLk=; b=rJj//cDxlRdA/V iKG1J24uHqQZL5K/tSz28akiP37+FI9k7r8PYvdelgyuIe33t5bm1EAEGR5FT29Dy/1BvOYTXeWpa YHjayQdDSf0A8nPKGsknoGvZivkv2tuMJdRhScILodAPd3xQQYacs3EhEjKhmBjP5ZUSAckesMDkQ hbjM23ZF37rMuC/WP1rEQ/0+I3hMDHjVcs4VMvZuBVQbNrBGuh3WbUCntQRihFnGtuRraV5rMWBp3 HB26f/jXn7up3eVyCn5coSDFYc8hFQYvMjASNX9+PKF1WOy3uIEsI2xRjmBCakUN5saYP+QHg5tne V6Y5aN9qiTB+eMFPvR4A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jfcsz-0002Qe-AN; Mon, 01 Jun 2020 05:21:21 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jfcsx-0002QC-7a; Mon, 01 Jun 2020 05:21:20 +0000 X-UUID: 638de9c90a524533a8df8cc0c6e16855-20200531 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=mSnY8KhqyWrchwEP6pw4hG/od6FJgo3wLIYoRyPzhfE=; b=D4y2Wt2kItSi47C01eQHHv66LTeaD0rn8P4b6LNPEyhuGnF1InSqOToJSt2GdadI87jgrkp2VDF6Plwxgv+N/jizrl4cDSFfFgj2LkwFcf3HBNaKlpGFiG3dFpNldh9FqudqCfqKbByQltePgJSqg6+OmglSgPfX0vTUpXC1VV0=; X-UUID: 638de9c90a524533a8df8cc0c6e16855-20200531 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1232582855; Sun, 31 May 2020 21:20:58 -0800 Received: from MTKMBS01N2.mediatek.inc (172.21.101.79) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 31 May 2020 22:11:08 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs01n2.mediatek.inc (172.21.101.79) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 1 Jun 2020 13:11:06 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 1 Jun 2020 13:11:06 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Jonathan Corbet Subject: [PATCH v7 4/4] kasan: update documentation for generic kasan Date: Mon, 1 Jun 2020 13:11:11 +0800 Message-ID: <20200601051111.1359-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-SNTS-SMTP: AD8C74DB6C0C24E053BEBE0CB306A11DA5F9CA9F00D17BE39A5608DC48F6A5BF2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200531_222119_277207_784D4E78 X-CRM114-Status: UNSURE ( 7.23 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Walter Wu , wsd_upstream , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Generic KASAN will support to record the last two call_rcu() call stacks and print them in KASAN report. So that need to update documentation. Signed-off-by: Walter Wu Reviewed-and-tested-by: Dmitry Vyukov Reviewed-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Jonathan Corbet --- Documentation/dev-tools/kasan.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index c652d740735d..fede42e6536b 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -193,6 +193,9 @@ 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. + Software tag-based KASAN ~~~~~~~~~~~~~~~~~~~~~~~~