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Subject[PATCH 3.18 030/124] Reset TreeId to zero on SMB2 TREE_CONNECT
Date
3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jan-Marek Glogowski <glogow@fbihome.de>

commit 806a28efe9b78ffae5e2757e1ee924b8e50c08ab upstream.

Currently the cifs module breaks the CIFS specs on reconnect as
described in http://msdn.microsoft.com/en-us/library/cc246529.aspx:

"TreeId (4 bytes): Uniquely identifies the tree connect for the
command. This MUST be 0 for the SMB2 TREE_CONNECT Request."

Signed-off-by: Jan-Marek Glogowski <glogow@fbihome.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Tested-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/cifs/smb2pdu.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -868,6 +868,10 @@ SMB2_tcon(const unsigned int xid, struct
return -EINVAL;
}

+ /* SMB2 TREE_CONNECT request must be called with TreeId == 0 */
+ if (tcon)
+ tcon->tid = 0;
+
rc = small_smb2_init(SMB2_TREE_CONNECT, tcon, (void **) &req);
if (rc) {
kfree(unc_path);

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