From: Steve French <stfrench@microsoft.com>
Date: Thu, 31 May 2018 20:19:25 +0000 (-0500)
Subject: smb3: on reconnect set PreviousSessionId field
X-Git-Tag: v4.16.18~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d067072782ea26ff96821d70aa32bf78a31c1063;p=thirdparty%2Fkernel%2Fstable.git

smb3: on reconnect set PreviousSessionId field

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@vger.kernel.org>
CC: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 93d3f4a14b32b..1c790a9701b8f 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1172,6 +1172,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
 	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;
 
 #ifdef CONFIG_CIFS_SMB311
 	/*