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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 9DDC4C4332B for ; Fri, 15 Jan 2021 12:49:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6ABAA221F7 for ; Fri, 15 Jan 2021 12:49:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387786AbhAOMtT (ORCPT ); Fri, 15 Jan 2021 07:49:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:42934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727417AbhAOMgk (ORCPT ); Fri, 15 Jan 2021 07:36:40 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 53FC6221FA; Fri, 15 Jan 2021 12:36:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610714184; bh=rb/RAziuPJFotbLNfH5a2TLZPQNXLsb3cQjCx+een1g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RGgRFtAm1azhUL84qffmZiytTkATe/iW4ws5AelhSmJRseM/9o+DebgR4c8PzLm7h I6nrpDOvJQh9wQRdo4ZxoDsyktznIrivbsK+RvrMPsLo+zThopvaZYlwF8/Q4vzRHn ATL9nY46tf0CCB2nLAxyQGnM7pPfJ8wuWJI93ZfI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jakub Kicinski , "David S. Miller" Subject: [PATCH 5.10 021/103] net: vlan: avoid leaks on register_vlan_dev() failures Date: Fri, 15 Jan 2021 13:27:14 +0100 Message-Id: <20210115122007.073696003@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210115122006.047132306@linuxfoundation.org> References: <20210115122006.047132306@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jakub Kicinski [ Upstream commit 55b7ab1178cbf41f979ff83236d3321ad35ed2ad ] VLAN checks for NETREG_UNINITIALIZED to distinguish between registration failure and unregistration in progress. Since commit cb626bf566eb ("net-sysfs: Fix reference count leak") registration failure may, however, result in NETREG_UNREGISTERED as well as NETREG_UNINITIALIZED. This fix is similer to cebb69754f37 ("rtnetlink: Fix memory(net_device) leak when ->newlink fails") Fixes: cb626bf566eb ("net-sysfs: Fix reference count leak") Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/8021q/vlan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -284,7 +284,8 @@ static int register_vlan_device(struct n return 0; out_free_newdev: - if (new_dev->reg_state == NETREG_UNINITIALIZED) + if (new_dev->reg_state == NETREG_UNINITIALIZED || + new_dev->reg_state == NETREG_UNREGISTERED) free_netdev(new_dev); return err; }