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 8D3F11E89C; Tue, 27 May 2025 17:20:59 +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=1748366459; cv=none; b=D4W3LQS/WXr8B/+5sNEkeidkCYvFkYBAeoM2F4oBp+Lvcv+C+silGT2Xni7g1RHgcJ8Q0/uXBp5R0xSihffXJNob4B7Kui+jz2BXvzTUOquAbicdXnBT7JPjjwbpBAAJWeoBB3AngsNjDSJIOdu/+2mCxhX/ZA+K8depM03H1c8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748366459; c=relaxed/simple; bh=QMEvCTuGi/JB7dyPBdZF1WJghJuC5fEfQAZQaO57h4Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=n1Ih2LvFl7fdb+JCJKXdOJkLDyzIUbQK7LAGD0mG7w6MqGPaZ2zLrdmIpdIkJTytSyHq0uoLere/cnJ8J9XaIAVeCkJTyba679vAqBDOKmy3w29ZObOAFJLRhqeT+MxGO6LkaZMCizxp4HztX6vuzzE8e4ouml3/02FEIaWwNbE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tD7ifQSb; 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="tD7ifQSb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFD0BC4CEE9; Tue, 27 May 2025 17:20:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748366459; bh=QMEvCTuGi/JB7dyPBdZF1WJghJuC5fEfQAZQaO57h4Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tD7ifQSbjUqLqOOFebJul3Ik6SgAuw4PTi/lSfkEKlii1cfowcVw7OITEmmynq/nV j4NnYbS6YdVClYCvly6125MRZr7BIZhkZ88tfPeS5g4lJb8ScvQw7Fpruq7bGUEqzl Qf3jufpVadnRLS37BAxzgrlfuhBHTECA07OpJtw8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Pali=20Roh=C3=A1r?= , Steve French , Sasha Levin Subject: [PATCH 6.14 074/783] cifs: Check if server supports reparse points before using them Date: Tue, 27 May 2025 18:17:51 +0200 Message-ID: <20250527162516.144613903@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250527162513.035720581@linuxfoundation.org> References: <20250527162513.035720581@linuxfoundation.org> User-Agent: quilt/0.68 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pali Rohár [ Upstream commit 6c06be908ca190e2d8feae1cf452d78598cd0b94 ] Do not attempt to query or create reparse point when server fs does not support it. This will prevent creating unusable empty object on the server. Signed-off-by: Pali Rohár Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/client/cifssmb.c | 3 +++ fs/smb/client/link.c | 3 ++- fs/smb/client/smb2inode.c | 8 ++++++++ fs/smb/client/smb2ops.c | 4 ++-- 4 files changed, 15 insertions(+), 3 deletions(-) diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c index e90811f321944..53e3e8282cb2a 100644 --- a/fs/smb/client/cifssmb.c +++ b/fs/smb/client/cifssmb.c @@ -2725,6 +2725,9 @@ int cifs_query_reparse_point(const unsigned int xid, if (cap_unix(tcon->ses)) return -EOPNOTSUPP; + if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)) + return -EOPNOTSUPP; + oparms = (struct cifs_open_parms) { .tcon = tcon, .cifs_sb = cifs_sb, diff --git a/fs/smb/client/link.c b/fs/smb/client/link.c index 34a026243287f..769752ad2c5ce 100644 --- a/fs/smb/client/link.c +++ b/fs/smb/client/link.c @@ -643,7 +643,8 @@ cifs_symlink(struct mnt_idmap *idmap, struct inode *inode, case CIFS_SYMLINK_TYPE_NATIVE: case CIFS_SYMLINK_TYPE_NFS: case CIFS_SYMLINK_TYPE_WSL: - if (server->ops->create_reparse_symlink) { + if (server->ops->create_reparse_symlink && + (le32_to_cpu(pTcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)) { rc = server->ops->create_reparse_symlink(xid, inode, direntry, pTcon, diff --git a/fs/smb/client/smb2inode.c b/fs/smb/client/smb2inode.c index 826b57a5a2a8d..e9fd3e204a6f4 100644 --- a/fs/smb/client/smb2inode.c +++ b/fs/smb/client/smb2inode.c @@ -1273,6 +1273,14 @@ struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data, int rc; int i; + /* + * If server filesystem does not support reparse points then do not + * attempt to create reparse point. This will prevent creating unusable + * empty object on the server. + */ + if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)) + return ERR_PTR(-EOPNOTSUPP); + oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, SYNCHRONIZE | DELETE | FILE_READ_ATTRIBUTES | diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 6795970d4de6e..fbb3686292134 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -5237,7 +5237,7 @@ static int smb2_make_node(unsigned int xid, struct inode *inode, const char *full_path, umode_t mode, dev_t dev) { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - int rc; + int rc = -EOPNOTSUPP; /* * Check if mounted with mount parm 'sfu' mount parm. @@ -5248,7 +5248,7 @@ static int smb2_make_node(unsigned int xid, struct inode *inode, if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { rc = cifs_sfu_make_node(xid, inode, dentry, tcon, full_path, mode, dev); - } else { + } else if (le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS) { rc = smb2_mknod_reparse(xid, inode, dentry, tcon, full_path, mode, dev); } -- 2.39.5