[CIFS] Fix oops when negotiating lanman and no password specified

Pointed out by Guenter Kukkukk

Signed-of-by: Steve French <sfrench@us.ibm.com>
(cherry picked from bbf33d512da608c7221fec42b56b9ef89c25a5ee commit)

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index a89efaf78a26..4bc250b2d9fc 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -277,7 +277,8 @@ void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
                 return;
 
         memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
-        strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
+        if(ses->password)
+                strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
 
         if((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
                 if(extended_security & CIFSSEC_MAY_PLNTXT) {