From: Steve French <stfrench@microsoft.com>
Date: Thu, 31 May 2018 15:19:25 -0500
Subject: [PATCH] smb3: on reconnect set PreviousSessionId field
Git-commit: b2adf22fdfba85a6701c481faccdbbb3a418ccfc
Patch-mainline: v4.18-rc1
References: bsc#1112899, bsc#1144333

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>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
 fs/cifs/smb2pdu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index c92b4e6689bd..71e7a5a05f12 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1352,6 +1352,7 @@ 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
 	/*
-- 
2.16.4