BugLink: https://bugs.launchpad.net/bugs/1838116
[ Upstream commit
969ae8e8d4ee54c99134d3895f2adf96047f5bee ]
Old windows version or Netapp SMB server will return
NT_STATUS_NOT_SUPPORTED since they do not allow or implement
FSCTL_VALIDATE_NEGOTIATE_INFO. The client should accept the response
provided it's properly signed.
See
https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/
and
MS-SMB2 validate negotiate response processing:
https://msdn.microsoft.com/en-us/library/hh880630.aspx
Samba client had already handled it.
https://bugzilla.samba.org/attachment.cgi?id=13285&action=edit
Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>
rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
(char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
-
- if (rc != 0) {
+ if (rc == -EOPNOTSUPP) {
+ /*
+ * Old Windows versions or Netapp SMB server can return
+ * not supported error. Client should accept it.
+ */
+ cifs_dbg(VFS, "Server does not support validate negotiate\n");
+ return 0;
+ } else if (rc != 0) {
cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
rc = -EIO;
goto out_free_inbuf;