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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 D16FFC54FCB for ; Mon, 20 Apr 2020 12:51:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A6D5C20736 for ; Mon, 20 Apr 2020 12:51:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587387075; bh=ENj6Qt52KrnVwLM66JGBO+2QFyAr22rkd+rd3OdPeVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zH5cSX7TuNeNYHjGReFJGSZeIJ8CDt4Qnl7sjYIaB160FnprvvJLk9WuwpjBlKEHG 05hydYSmGzQcOBl148T4rDt2meu3hgaHGYjkISkhHWVX9cBWxIu9la6rlNXNQWyfq8 ufB7or51AdhZAyX0qKl/FH3iPKyZFKFngvt/kNBs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729272AbgDTMsf (ORCPT ); Mon, 20 Apr 2020 08:48:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:45248 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728217AbgDTMse (ORCPT ); Mon, 20 Apr 2020 08:48:34 -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 6667F2072B; Mon, 20 Apr 2020 12:48:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587386913; bh=ENj6Qt52KrnVwLM66JGBO+2QFyAr22rkd+rd3OdPeVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uGB+clyx4p79u6Lj6O9ONhjiqFGqbdXM7gkIpvw/uakwbP7biQro9I4lEKOtyWdLO eFdq7DJJu4FarEjv3x3z7OHYpf4H3Bk6ukz0FlNq19onF/JZrJK0cw7eCFVST1GndY bshHcy4Nq8ezfbN2rmfISJuBz94naL+cLH+qg96A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Amir Goldstein , Miklos Szeredi Subject: [PATCH 4.19 09/40] ovl: fix value of i_ino for lower hardlink corner case Date: Mon, 20 Apr 2020 14:39:19 +0200 Message-Id: <20200420121454.159987874@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200420121444.178150063@linuxfoundation.org> References: <20200420121444.178150063@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: Amir Goldstein commit 300b124fcf6ad2cd99a7b721e0f096785e0a3134 upstream. Commit 6dde1e42f497 ("ovl: make i_ino consistent with st_ino in more cases"), relaxed the condition nfs_export=on in order to set the value of i_ino to xino map of real ino. Specifically, it also relaxed the pre-condition that index=on for consistent i_ino. This opened the corner case of lower hardlink in ovl_get_inode(), which calls ovl_fill_inode() with ino=0 and then ovl_init_inode() is called to set i_ino to lower real ino without the xino mapping. Pass the correct values of ino;fsid in this case to ovl_fill_inode(), so it can initialize i_ino correctly. Fixes: 6dde1e42f497 ("ovl: make i_ino consistent with st_ino in more ...") Signed-off-by: Amir Goldstein Signed-off-by: Miklos Szeredi Signed-off-by: Greg Kroah-Hartman --- fs/overlayfs/inode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -884,7 +884,7 @@ struct inode *ovl_get_inode(struct super struct dentry *lowerdentry = lowerpath ? lowerpath->dentry : NULL; bool bylower = ovl_hash_bylower(sb, upperdentry, lowerdentry, oip->index); - int fsid = bylower ? oip->lowerpath->layer->fsid : 0; + int fsid = bylower ? lowerpath->layer->fsid : 0; bool is_dir, metacopy = false; unsigned long ino = 0; int err = oip->newinode ? -EEXIST : -ENOMEM; @@ -934,6 +934,8 @@ struct inode *ovl_get_inode(struct super err = -ENOMEM; goto out_err; } + ino = realinode->i_ino; + fsid = lowerpath->layer->fsid; } ovl_fill_inode(inode, realinode->i_mode, realinode->i_rdev, ino, fsid); ovl_inode_init(inode, upperdentry, lowerdentry, oip->lowerdata);