linux-kernel - [PATCH 4.9 30/39] smb3: on reconnect set PreviousSessionId field

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Date:   Sun, 24 Jun 2018 23:24:17 +0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sachin Prabhu <sprabhu@...hat.com>,
        Steve French <smfrench@...il.com>,
        Ronnie Sahlberg <lsahlber@...hat.com>
Subject: [PATCH 4.9 30/39] smb3: on reconnect set PreviousSessionId field

4.9-stable review patch.  If anyone has any objections, please let me know.

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

From: Steve French <stfrench@...rosoft.com>

commit b2adf22fdfba85a6701c481faccdbbb3a418ccfc upstream.

The server detects reconnect by the (non-zero) value in PreviousSessionId
of SMB2/SMB3 SessionSetup request, but this behavior regressed due
to commit 166cea4dc3a4f66f020cfb9286225ecd228ab61d
("SMB2: Separate RawNTLMSSP authentication from SMB2_sess_setup")

CC: Stable <stable@...r.kernel.org>
CC: Sachin Prabhu <sprabhu@...hat.com>
Signed-off-by: Steve French <smfrench@...il.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1004,6 +1004,7 @@ SMB2_sess_setup(const unsigned int xid,
 	sess_data->ses = ses;
 	sess_data->buf0_type = CIFS_NO_BUFFER;
 	sess_data->nls_cp = (struct nls_table *) nls_cp;
+	sess_data->previous_session = ses->Suid;
 
 	while (sess_data->func)
 		sess_data->func(sess_data);