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authorSteve French <smfrench@gmail.com>2016-09-21 06:56:13 +0300
committerSteve French <smfrench@gmail.com>2016-10-12 20:08:31 +0300
commitc2afb8147e69819885493edf3a7c1ce03aaf2d4e (patch)
tree280a23800e282ba1a79a3297c4cfdbcf241975ff /fs/cifs
parent7d414f396c91a3382e51cf628c1cf0709ad0188b (diff)
downloadlinux-c2afb8147e69819885493edf3a7c1ce03aaf2d4e.tar.xz
Set previous session id correctly on SMB3 reconnect
Signed-off-by: Steve French <steve.french@primarydata.com> CC: Stable <stable@vger.kernel.org> Reported-by: David Goebel <davidgoe@microsoft.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/smb2pdu.c5
-rw-r--r--fs/cifs/smb2pdu.h2
2 files changed, 6 insertions, 1 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 967a7904fb8f..e8638432a233 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -604,6 +604,7 @@ SMB2_sess_setup(const unsigned int xid, struct cifs_ses *ses,
char *security_blob = NULL;
unsigned char *ntlmssp_blob = NULL;
bool use_spnego = false; /* else use raw ntlmssp */
+ u64 previous_session = ses->Suid;
cifs_dbg(FYI, "Session Setup\n");
@@ -641,6 +642,10 @@ ssetup_ntlmssp_authenticate:
return rc;
req->hdr.SessionId = 0; /* First session, not a reauthenticate */
+
+ /* if reconnect, we need to send previous sess id, otherwise it is 0 */
+ req->PreviousSessionId = previous_session;
+
req->Flags = 0; /* MBZ */
/* to enable echos and oplocks */
req->hdr.CreditRequest = cpu_to_le16(3);
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index ff88d9feb01e..fd3709e8de33 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -276,7 +276,7 @@ struct smb2_sess_setup_req {
__le32 Channel;
__le16 SecurityBufferOffset;
__le16 SecurityBufferLength;
- __le64 PreviousSessionId;
+ __u64 PreviousSessionId;
__u8 Buffer[1]; /* variable length GSS security buffer */
} __packed;