From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 333B86FB1; Tue, 5 Dec 2023 03:36:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="SAFgPoEm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8CD4C433C7; Tue, 5 Dec 2023 03:36:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701747361; bh=hx3gRY8//gMNjOq3OpAUxKG69NC8ubHeRgnZbI0oP/8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SAFgPoEm7RelPuH9JK+Dns4zd3dTDryZMlElgdquEvIbuueMtydusyK7xaLRKO4zN Ng3nnVnK25bogPprREkGJEpvzEVAeeEXf3dYyLgzr/YaM3AHtgG+yMmpsUyxvqnW02 gg7TYIxhRorBNyBoP+ccxibTNVmulec5Ab4q9Kgk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff Layton , Chuck Lever , Al Viro Subject: [PATCH 5.10 047/135] nfsd: lock_rename() needs both directories to live on the same fs Date: Tue, 5 Dec 2023 12:16:08 +0900 Message-ID: <20231205031533.491617244@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231205031530.557782248@linuxfoundation.org> References: <20231205031530.557782248@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Al Viro commit 1aee9158bc978f91701c5992e395efbc6da2de3c upstream. ... checking that after lock_rename() is too late. Incidentally, NFSv2 had no nfserr_xdev... Fixes: aa387d6ce153 "nfsd: fix EXDEV checking in rename" Cc: stable@vger.kernel.org # v3.9+ Reviewed-by: Jeff Layton Acked-by: Chuck Lever Tested-by: Jeff Layton Signed-off-by: Al Viro Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/vfs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1758,6 +1758,12 @@ nfsd_rename(struct svc_rqst *rqstp, stru if (!flen || isdotent(fname, flen) || !tlen || isdotent(tname, tlen)) goto out; + err = (rqstp->rq_vers == 2) ? nfserr_acces : nfserr_xdev; + if (ffhp->fh_export->ex_path.mnt != tfhp->fh_export->ex_path.mnt) + goto out; + if (ffhp->fh_export->ex_path.dentry != tfhp->fh_export->ex_path.dentry) + goto out; + retry: host_err = fh_want_write(ffhp); if (host_err) { @@ -1792,12 +1798,6 @@ retry: if (ndentry == trap) goto out_dput_new; - host_err = -EXDEV; - if (ffhp->fh_export->ex_path.mnt != tfhp->fh_export->ex_path.mnt) - goto out_dput_new; - if (ffhp->fh_export->ex_path.dentry != tfhp->fh_export->ex_path.dentry) - goto out_dput_new; - if (nfsd_has_cached_files(ndentry)) { has_cached = true; goto out_dput_old;