From 806a28efe9b78ffae5e2757e1ee924b8e50c08ab Mon Sep 17 00:00:00 2001 From: Jan-Marek Glogowski Date: Mon, 20 Feb 2017 12:25:58 +0100 Subject: [PATCH] Reset TreeId to zero on SMB2 TREE_CONNECT 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 Reviewed-by: Aurelien Aptel Tested-by: Aurelien Aptel Signed-off-by: Steve French CC: Stable --- fs/cifs/smb2pdu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 7446496850a3..66fa1b941cdf 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1185,6 +1185,10 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree, 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); -- 2.20.1