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,USER_AGENT_GIT autolearn=unavailable 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 54391C47253 for ; Thu, 30 Apr 2020 13:55:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2842D20873 for ; Thu, 30 Apr 2020 13:55:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254944; bh=B0THgzLB98z6nynqqw9dkSLS0zUCJgWl0JwEXxMV4wY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=RGQi3BLrKRKB/an5s5ANlPBeW5oh2wff9ZKfZYMZWUfTlGnYv1Fw91So9asjfaKty 3hv+eBoJkgVJfzJcsCWNO/1+IuleYxA/4ZZYPNlRBkiV1mmjz8m0tH7Aetq6ca6H8N wAngNlkDrp5gW3TLOmqY680pHAxoRHkjZZYjYN0o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729089AbgD3Nzm (ORCPT ); Thu, 30 Apr 2020 09:55:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:37842 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727121AbgD3NzA (ORCPT ); Thu, 30 Apr 2020 09:55:00 -0400 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 298C72137B; Thu, 30 Apr 2020 13:54:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588254900; bh=B0THgzLB98z6nynqqw9dkSLS0zUCJgWl0JwEXxMV4wY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FA44ig/uLEEH1luvErhGj0VPfOPWhXLQCXIbmxposSeoP9IxVXwkM2qNRGKtSElC6 L7QHk1o+0cR9w79L4hjgWugfwqMcIsHPGTbx6DCVDodIjS91sAD4+tfZp7aM/nFxBe MBoU2ws1TG4Qgl4fCtorqkwVqyOdZzQFX1uu3mEU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ronnie Sahlberg , Jeff Layton , Steve French , Sasha Levin , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org Subject: [PATCH AUTOSEL 4.4 05/11] cifs: protect updating server->dstaddr with a spinlock Date: Thu, 30 Apr 2020 09:54:47 -0400 Message-Id: <20200430135453.21353-5-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200430135453.21353-1-sashal@kernel.org> References: <20200430135453.21353-1-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: Ronnie Sahlberg [ Upstream commit fada37f6f62995cc449b36ebba1220594bfe55fe ] We use a spinlock while we are reading and accessing the destination address for a server. We need to also use this spinlock to protect when we are modifying this address from reconn_set_ipaddr(). Signed-off-by: Ronnie Sahlberg Reviewed-by: Jeff Layton Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/cifs/connect.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index cf104bbe30a14..c9793ce0d3368 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -338,8 +338,10 @@ static int reconn_set_ipaddr(struct TCP_Server_Info *server) return rc; } + spin_lock(&cifs_tcp_ses_lock); rc = cifs_convert_address((struct sockaddr *)&server->dstaddr, ipaddr, strlen(ipaddr)); + spin_unlock(&cifs_tcp_ses_lock); kfree(ipaddr); return !rc ? -1 : 0; -- 2.20.1