From patchwork Mon Jul 4 01:40:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haibo Li X-Patchwork-Id: 12904585 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 48107C43334 for ; Mon, 4 Jul 2022 02:21:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC: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=6xeI5fNAsGuZCYRpmm86LumLOaMx8ngE0EkeExry2HY=; b=kGCC7ruKfjCsSfb1yL0Z6Wx2J8 uZHHRxRGnmwJQV988nl+qPauq2H8wrr52gX1edgbhwEza6KQzkQQ56TQn50W0/XTu6KqJvxGG6oDy jnxqQmxBw1SZtclksf5+FrOm8NExtPQ2PqYB3PcvUQ/15C30fa5wmtI/8W2Fq30eehKd1kZyvJp0s AdD+0S6Uk0lKTGWoHeIvlZA+1PqjvEzJNXWXzYTs1FU/o6isQBM9xpEjl6mbb0teo7MA3gBT535MD 04uJwU4wF21KQss9LuKQMY9G2XascQiG2leB/cgqtrEmv/JtklG+FHnXa2bpzi7cX0oEth97inCMa X0HMa9dw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8BiO-003Unq-Td; Mon, 04 Jul 2022 02:21:32 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8BiL-003Uju-Id; Mon, 04 Jul 2022 02:21:30 +0000 X-UUID: 4f248f3201f04947b82d7141fd7c9921-20220703 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:8cf74526-6f4e-4fb6-a497-6893bf576f80,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:87442a2,CLOUDID:c5c46f86-57f0-47ca-ba27-fe8c57fbf305,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 4f248f3201f04947b82d7141fd7c9921-20220703 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 522663982; Sun, 03 Jul 2022 19:21:23 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Mon, 4 Jul 2022 09:40:48 +0800 Received: from mszsdtcf10.gcn.mediatek.inc (10.16.4.60) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Mon, 4 Jul 2022 09:40:48 +0800 From: Haibo Li To: Sami Tolvanen CC: , Kees Cook , Nathan Chancellor , Nick Desaulniers , Matthias Brugger , Peter Zijlstra , Masami Hiramatsu , Christophe Leroy , =?utf-8?q?Andr=C3=A9_Almeid?= =?utf-8?q?a?= , Luis Chamberlain , Juergen Gross , Haibo Li , Tiezhu Yang , Aaron Tomlin , Dmitry Torokhov , , , , Subject: [PATCH v2 0/2] cfi: free old cfi shadow asynchronously Date: Mon, 4 Jul 2022 09:40:44 +0800 Message-ID: <20220704014046.34596-1-haibo.li@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220703_192129_664146_16E56B62 X-CRM114-Status: UNSURE ( 9.19 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org This patchset changes synchronize_rcu to call_rcu in update_shadow. Patch 1 enables the CFI sanitization for cfi.c and bypass __cfi_slowpath_diag. It is the prerequisite for using call_rcu in cfi.c. Patch 2 changes synchronize_rcu to call_rcu and free old cfi shadow in rcu cb Changes in v2: - Remove _run_cfi_check,add __nocfi to __cfi_slowpath_diag directly - Rename _cfi_shadow_free_rcu to free_shadow Haibo Li (2): cfi: enable sanitize for cfi.c cfi: free old cfi shadow asynchronously kernel/Makefile | 3 --- kernel/cfi.c | 14 +++++++++++--- 2 files changed, 11 insertions(+), 6 deletions(-) Reviewed-by: Sami Tolvanen