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=-7.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A076AC43441 for ; Mon, 19 Nov 2018 16:58:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 657E1214C1 for ; Mon, 19 Nov 2018 16:58:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Cl3BH3aR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 657E1214C1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404722AbeKTDWV (ORCPT ); Mon, 19 Nov 2018 22:22:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:33964 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403845AbeKTDWU (ORCPT ); Mon, 19 Nov 2018 22:22:20 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 BF20C2148E; Mon, 19 Nov 2018 16:58:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542646685; bh=+MFj62VTLZi1Iy+VVFJ+U7l7vvFLXno+py6p6b6XwAs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cl3BH3aRs0PDhuP7Ey2WiGuFb/K8icB60XQZCwlxJjFTj64Y9ivm40XvfkljJqpyy ZX9liGAgxtxYhE+RPFs99l61zLZN2130IfwtaigeX0Rr8sLsOaWQgBxIG8S7tnAJ22 rylwDBnJJGE6Ko7qHASYrGWXCnyw7uugHtOtU5XQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+c54f8e94e6bba03b04e9@syzkaller.appspotmail.com, Al Viro Subject: [PATCH 4.4 051/160] gfs2_meta: ->mount() can get NULL dev_name Date: Mon, 19 Nov 2018 17:28:10 +0100 Message-Id: <20181119162636.515140005@linuxfoundation.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181119162630.031306128@linuxfoundation.org> References: <20181119162630.031306128@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Al Viro commit 3df629d873f8683af6f0d34dfc743f637966d483 upstream. get in sync with mount_bdev() handling of the same Reported-by: syzbot+c54f8e94e6bba03b04e9@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Al Viro Signed-off-by: Greg Kroah-Hartman --- fs/gfs2/ops_fstype.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/gfs2/ops_fstype.c +++ b/fs/gfs2/ops_fstype.c @@ -1353,6 +1353,9 @@ static struct dentry *gfs2_mount_meta(st struct path path; int error; + if (!dev_name || !*dev_name) + return ERR_PTR(-EINVAL); + error = kern_path(dev_name, LOOKUP_FOLLOW, &path); if (error) { pr_warn("path_lookup on %s returned error %d\n",