From patchwork Fri May 22 02:02:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Walter Wu X-Patchwork-Id: 11564353 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 2717F90 for ; Fri, 22 May 2020 02:02:31 +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 014F22072C for ; Fri, 22 May 2020 02:02:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="sc7R6zzO"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="W4d4mS/l" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 014F22072C 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=QDBY0xXoum/J9bGM18nTcYZdZIWDbr9j6w1ByVrfKIs=; b=sc7R6zzO0cgDEu mC6QDDienaRwRt/JqfFDLJQEbt/5xMShSsLRlL+Gu38as6CT5JF9MMNAENtV4Hl9SQEYEJks0RLLf /nYk3Pd/9W8vDgfcEdBQjPaL9/PYdQupSRsL0+IIO4j3S1vnFuVmXMQ+k/xsbOjakPFGRuT6/Yt1+ m0DZUP9fIdaBXcbqcK9iG7TrhMwYlEO//XgfEGZ0B5Nhqpfha+OKcS7aauqC5B6O5OWivfi2ZNGtm pPRCg92bJT1nFKQITLR8n3OnnjETyXvEw2X5ixOTG9kysOfxGReTqpMOYHGaiGuScVb21ktP953A+ hqaiV9sZHp7EIMzpLFhQ==; 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 1jbx0x-0001Sd-2H; Fri, 22 May 2020 02:02:23 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jbx0t-0001QQ-6l; Fri, 22 May 2020 02:02:20 +0000 X-UUID: c08274b633064a98becc9f2f0b799b53-20200521 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=qIWtxoGuZ5P6mO49eH/CrXHztmv7j3tYchUpE2BMWOE=; b=W4d4mS/lmhxkiGXUku7OiRPcT+PtShkiyBU8ll5t8mWZfJBWYwtCJVK436oJiJF766jBshnlD/DLQB4VKr1W82iwuR4u08y5qbrsc2596txEJ8u7PEhDvh+LwavCy5hx1Jl4ZIEIb2WSENR0+YSMdI+/xZlyqney+VETXWo6QKo=; X-UUID: c08274b633064a98becc9f2f0b799b53-20200521 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 837263199; Thu, 21 May 2020 18:02:07 -0800 Received: from MTKMBS06N2.mediatek.inc (172.21.101.130) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 21 May 2020 19:02:14 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs06n2.mediatek.inc (172.21.101.130) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 22 May 2020 10:02:11 +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; Fri, 22 May 2020 10:02:12 +0800 From: Walter Wu To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Jonathan Corbet Subject: [PATCH v6 4/4] kasan: update documentation for generic kasan Date: Fri, 22 May 2020 10:02:12 +0800 Message-ID: <20200522020212.23460-1-walter-zh.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-SNTS-SMTP: 96CB23A265DA29919D6ADF75D54BB85AE65E7498DE570CC72449AA74EB4B50CD2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200521_190219_280271_1B29849F X-CRM114-Status: UNSURE ( 6.73 ) 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_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches 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_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from 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 Cc: Andrey Ryabinin Cc: Dmitry Vyukov 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 ~~~~~~~~~~~~~~~~~~~~~~~~