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Do not send ClientGUID on SMB2.02 dialect
author
Steve French
<smfrench@gmail.com>
Tue, 13 May 2014 20:37:45 +0000
(13:37 -0700)
committer
Steve French
<smfrench@gmail.com>
Wed, 21 May 2014 17:18:06 +0000
(10:18 -0700)
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
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diff --git
a/fs/cifs/smb2pdu.c
b/fs/cifs/smb2pdu.c
index dc44610fdc0d722f70eaeeabbbd0f9ee462a698d..0feb743894b84f583391bf028d29cd5bbeea5b47 100644
(file)
--- a/
fs/cifs/smb2pdu.c
+++ b/
fs/cifs/smb2pdu.c
@@
-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 */
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