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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 2518AC43331 for ; Sun, 10 Nov 2019 02:54:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF90D214E0 for ; Sun, 10 Nov 2019 02:54:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573354493; bh=8iD2RbErPWDnc+352S6Dt9T6EhXU+MLXptMB07sJbVA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YgTixXz8HhChiwHM4TIvXaYYI4axPPcOMtaRnxbOA6zuo9njybKvkhYjYztiF08KO gQ+CqGYVK1+Jj4xtMoBQ76wF9Oe4jCqdoDaMOoBUkVJbxN7zmV9r6+bXU/UVaZ8CrF V0szsJlLGL8MaK92uje+i6uikrMpHWF+AqvGyM/E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728957AbfKJCyv (ORCPT ); Sat, 9 Nov 2019 21:54:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:33950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729731AbfKJCu3 (ORCPT ); Sat, 9 Nov 2019 21:50:29 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B5E9F22595; Sun, 10 Nov 2019 02:50:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573354228; bh=8iD2RbErPWDnc+352S6Dt9T6EhXU+MLXptMB07sJbVA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DnmQeHc6IogblKyeWpewmp6+phaNEuJt+XQwpHFeoocRZIwEso+havvX0J4nEUfj8 9rp9EeGGVDGEzYDMVnoOMkkkOrRa7V5En0myDFpr9Whi5XBCM7mjqH9XibbaEZR3sw UNy+b1AkwuqKenYd8wX5aExYQBMhEG1ISYzDmpu0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kirill Tkhai , Miklos Szeredi , Sasha Levin , linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 65/66] fuse: use READ_ONCE on congestion_threshold and max_background Date: Sat, 9 Nov 2019 21:48:44 -0500 Message-Id: <20191110024846.32598-65-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191110024846.32598-1-sashal@kernel.org> References: <20191110024846.32598-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kirill Tkhai [ Upstream commit 2a23f2b8adbe4bd584f936f7ac17a99750eed9d7 ] Since they are of unsigned int type, it's allowed to read them unlocked during reporting to userspace. Let's underline this fact with READ_ONCE() macroses. Signed-off-by: Kirill Tkhai Signed-off-by: Miklos Szeredi Signed-off-by: Sasha Levin --- fs/fuse/control.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/fuse/control.c b/fs/fuse/control.c index e25c40c10f4fa..97ac2f5843fcc 100644 --- a/fs/fuse/control.c +++ b/fs/fuse/control.c @@ -107,7 +107,7 @@ static ssize_t fuse_conn_max_background_read(struct file *file, if (!fc) return 0; - val = fc->max_background; + val = READ_ONCE(fc->max_background); fuse_conn_put(fc); return fuse_conn_limit_read(file, buf, len, ppos, val); @@ -144,7 +144,7 @@ static ssize_t fuse_conn_congestion_threshold_read(struct file *file, if (!fc) return 0; - val = fc->congestion_threshold; + val = READ_ONCE(fc->congestion_threshold); fuse_conn_put(fc); return fuse_conn_limit_read(file, buf, len, ppos, val); -- 2.20.1