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=-5.6 required=3.0 tests=DATE_IN_PAST_06_12, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 AFFCFC7618B for ; Thu, 25 Jul 2019 05:49:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7FF7720657 for ; Thu, 25 Jul 2019 05:49:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564033760; bh=hpH3G4a7G/KVsYa4id/3HXxZbpYaTdI/T6rleRNvGhI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mtpRA2Z8WVEvfOf+4sTYv35hFKRhH98zo2FdtrxfL95BW+PppWpR2wsqSScYEabo5 gb0N/JNCK9il4Vk2dJdL/tfzhlqB4wXqmyXNs6YDf50FKaPuRtrM8ZSn1NhBWZJwal YJzvMrnE60PgpdnnagVph/HaB1KZqof13+KmNx00= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404967AbfGYFof (ORCPT ); Thu, 25 Jul 2019 01:44:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:59712 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404959AbfGYFoe (ORCPT ); Thu, 25 Jul 2019 01:44:34 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 27B0022BF5; Thu, 25 Jul 2019 05:44:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1564033473; bh=hpH3G4a7G/KVsYa4id/3HXxZbpYaTdI/T6rleRNvGhI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rxLBgHrbxCeS7ot2v9/QZvXhi5N08jHUF/bGmUoSmVLeCC3i/s2OkKJ0D2v/0khja lQosvZQluercq/Pr9OpTn9OKyu4CUA8rAppQC09qOr5TDsAoLQx/zsSdjVBJCX/8FA dw8WyBYitIovpott1IbjNxqg0Hzn0v0H95To8TL4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, YueHaibing , Dominique Martinet Subject: [PATCH 4.19 221/271] 9p/xen: Add cleanup path in p9_trans_xen_init Date: Wed, 24 Jul 2019 21:21:30 +0200 Message-Id: <20190724191714.072527248@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190724191655.268628197@linuxfoundation.org> References: <20190724191655.268628197@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: YueHaibing commit 80a316ff16276b36d0392a8f8b2f63259857ae98 upstream. If xenbus_register_frontend() fails in p9_trans_xen_init, we should call v9fs_unregister_trans() to do cleanup. Link: http://lkml.kernel.org/r/20190430143933.19368-1-yuehaibing@huawei.com Cc: stable@vger.kernel.org Fixes: 868eb122739a ("xen/9pfs: introduce Xen 9pfs transport driver") Signed-off-by: YueHaibing Signed-off-by: Dominique Martinet Signed-off-by: Greg Kroah-Hartman --- net/9p/trans_xen.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -530,13 +530,19 @@ static struct xenbus_driver xen_9pfs_fro static int p9_trans_xen_init(void) { + int rc; + if (!xen_domain()) return -ENODEV; pr_info("Initialising Xen transport for 9pfs\n"); v9fs_register_trans(&p9_xen_trans); - return xenbus_register_frontend(&xen_9pfs_front_driver); + rc = xenbus_register_frontend(&xen_9pfs_front_driver); + if (rc) + v9fs_unregister_trans(&p9_xen_trans); + + return rc; } module_init(p9_trans_xen_init);