Do not send ClientGUID on SMB2.02 dialect (3c5f9be1) · Commits · 戴 / test

ClientGUID must be zero for SMB2.02 dialect. See section 2.2.3 of MS-SMB2. For SMB2.1 and later it must be non-zero. Signed-off-by:

Steve French <smfrench@gmail.com> CC: Sachin Prabhu <sprabhu@redhat.com>

fs/cifs/smb2pdu.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -375,7 +375,12 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)

		req->Capabilities = cpu_to_le32(ses->server->vals->req_capabilities);

		memcpy(req->ClientGUID, server->client_guid, SMB2_CLIENT_GUID_SIZE);
		/* ClientGUID must be zero for SMB2.02 dialect */
		if (ses->server->vals->protocol_id == SMB20_PROT_ID)
		memset(req->ClientGUID, 0, SMB2_CLIENT_GUID_SIZE);
		else
		memcpy(req->ClientGUID, server->client_guid,
		SMB2_CLIENT_GUID_SIZE);

		iov[0].iov_base = (char *)req;
		/* 4 for rfc1002 length field */