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 6BADF266B6B; Tue, 16 Dec 2025 12:34:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765888492; cv=none; b=rxzuxnnNEGVu9miu5ldwhYjMnPd7HiLolD/RVBMIzYuklCQggKZkU9QOzTLbX+g1y5Xh/DHdSOv55HqGaMjOEmpLupMx4HK2CwFH3to0p3JTIoGyYPWfw1WaDNb2meiyPglH8ZI4Zs+25TlZk2OL87mopEqfn4ptff75Mxa8qNY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765888492; c=relaxed/simple; bh=qshjZCUH55V12HUtGgrdvdNa7P1rE9T7a1tcFrstiWI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HUbLQbkIVODqXtLJZzDHKKr9j33nQKfbWu/6xzF+pebxOHMcJsK0JnoqZcKSRGmg0aKjyab+xDOEVxbqsbz+t+x1HAviGHvQd40XQsK8e6LEsNXQIm4SkNp8ZuUcKy2z2LIeD0s9ZiFtF00K9hpqg8K2EshWN9kEyFJdsINwGlM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=v6WjXTeC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="v6WjXTeC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CFB07C4CEF5; Tue, 16 Dec 2025 12:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1765888492; bh=qshjZCUH55V12HUtGgrdvdNa7P1rE9T7a1tcFrstiWI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v6WjXTeCDCIv/HnnA5SG31rgJ0VJd/FeFPU5gz2Ieyk2S1aZSEdRLoWFzkZU/Y0rC lJZRmairqskCAl9Aj8AOXoTCj0GjEWhPTycV02AE8oWwH/YE+81q/xamF/5rZYqheM PIB2F74wpkXMG9FMcWpKMRENWWhUT1rtnMgflLpY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Li Lingfeng , Trond Myklebust , Sasha Levin Subject: [PATCH 6.18 550/614] NFS: Automounted filesystems should inherit ro,noexec,nodev,sync flags Date: Tue, 16 Dec 2025 12:15:17 +0100 Message-ID: <20251216111421.307391912@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251216111401.280873349@linuxfoundation.org> References: <20251216111401.280873349@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust [ Upstream commit 8675c69816e4276b979ff475ee5fac4688f80125 ] When a filesystem is being automounted, it needs to preserve the user-set superblock mount options, such as the "ro" flag. Reported-by: Li Lingfeng Link: https://lore.kernel.org/all/20240604112636.236517-3-lilingfeng@huaweicloud.com/ Fixes: f2aedb713c28 ("NFS: Add fs_context support.") Signed-off-by: Trond Myklebust Signed-off-by: Sasha Levin --- fs/nfs/namespace.c | 6 ++++++ fs/nfs/super.c | 4 ---- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c index 5a4d193da1a98..dca055676c4f3 100644 --- a/fs/nfs/namespace.c +++ b/fs/nfs/namespace.c @@ -149,6 +149,7 @@ struct vfsmount *nfs_d_automount(struct path *path) struct vfsmount *mnt = ERR_PTR(-ENOMEM); struct nfs_server *server = NFS_SB(path->dentry->d_sb); struct nfs_client *client = server->nfs_client; + unsigned long s_flags = path->dentry->d_sb->s_flags; int timeout = READ_ONCE(nfs_mountpoint_expiry_timeout); int ret; @@ -174,6 +175,11 @@ struct vfsmount *nfs_d_automount(struct path *path) fc->net_ns = get_net(client->cl_net); } + /* Inherit the flags covered by NFS_SB_MASK */ + fc->sb_flags_mask |= NFS_SB_MASK; + fc->sb_flags &= ~NFS_SB_MASK; + fc->sb_flags |= s_flags & NFS_SB_MASK; + /* for submounts we want the same server; referrals will reassign */ memcpy(&ctx->nfs_server._address, &client->cl_addr, client->cl_addrlen); ctx->nfs_server.addrlen = client->cl_addrlen; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 9b9464e70a7f0..66413133b43e3 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1315,10 +1315,6 @@ int nfs_get_tree_common(struct fs_context *fc) if (server->flags & NFS_MOUNT_NOAC) fc->sb_flags |= SB_SYNCHRONOUS; - if (ctx->clone_data.sb) - if (ctx->clone_data.sb->s_flags & SB_SYNCHRONOUS) - fc->sb_flags |= SB_SYNCHRONOUS; - /* Get a superblock - note that we may end up sharing one that already exists */ fc->s_fs_info = server; s = sget_fc(fc, compare_super, nfs_set_super); -- 2.51.0