diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 56c5d91..73c4c41 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -879,11 +879,16 @@
 	if (count < 3) {
 		/* single char or single char followed by null */
 		c = flags_string[0];
-		if (c == '0' || c == 'n' || c == 'N')
+		if (c == '0' || c == 'n' || c == 'N') {
 			extended_security = CIFSSEC_DEF; /* default */
-		else if (c == '1' || c == 'y' || c == 'Y')
+			return count;
+		} else if (c == '1' || c == 'y' || c == 'Y') {
 			extended_security = CIFSSEC_MAX;
-		return count;
+			return count;
+		} else if (!isdigit(c)) {
+			cERROR(1, ("invalid flag %c", c));
+			return -EINVAL;
+		}
 	}
 	/* else we have a number */
 
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 3fb046b..fbde55c 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -90,7 +90,8 @@
 };
 
 enum securityEnum {
-	LANMAN = 0,             /* Legacy LANMAN auth */
+	PLAINTXT = 0, 		/* Legacy with Plaintext passwords */
+	LANMAN,			/* Legacy LANMAN auth */
 	NTLM,			/* Legacy NTLM012 auth with NTLM hash */
 	NTLMv2,			/* Legacy NTLM auth with NTLMv2 hash */
 	RawNTLMSSP,		/* NTLMSSP without SPNEGO */
@@ -499,6 +500,7 @@
 
 #define   CIFSSEC_DEF  CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2
 #define   CIFSSEC_MAX  CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2
+#define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5)
 /*
  *****************************************************************
  * All constants go here
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 90b8f8d..fda8b24 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -438,8 +438,13 @@
 
 	pSMB->hdr.Mid = GetNextMid(server);
 	pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
+
 	if ((secFlags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5)
 		pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
+	else if ((secFlags & CIFSSEC_AUTH_MASK) == CIFSSEC_MAY_KRB5) {
+		cFYI(1, ("Kerberos only mechanism, enable extended security"));
+		pSMB->hdr.Flags2 |= SMBFLG2_EXT_SEC;
+	}
 
 	count = 0;
 	for (i = 0; i < CIFS_NUM_PROT; i++) {
@@ -573,7 +578,20 @@
 		server->secType = NTLM;
 	else if (secFlags & CIFSSEC_MAY_NTLMV2)
 		server->secType = NTLMv2;
-	/* else krb5 ... any others ... */
+	else if (secFlags & CIFSSEC_MAY_KRB5)
+		server->secType = Kerberos;
+	else if (secFlags & CIFSSEC_MAY_LANMAN)
+		server->secType = LANMAN;
+/* #ifdef CONFIG_CIFS_EXPERIMENTAL
+	else if (secFlags & CIFSSEC_MAY_PLNTXT)
+		server->secType = ??
+#endif */
+	else {
+		rc = -EOPNOTSUPP;
+		cERROR(1, ("Invalid security type"));
+		goto neg_err_exit;
+	}
+	/* else ... any others ...? */
 
 	/* one byte, so no need to convert this or EncryptionKeyLen from
 	   little endian */
@@ -3089,8 +3107,7 @@
 			goto qsec_out;
 		pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
 
-		cERROR(1, ("smb %p parm %p data %p",
-			  pSMBr, parm, psec_desc));  /* BB removeme BB */
+		cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, psec_desc));
 
 		if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
 			rc = -EIO;      /* bad smb */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index fc3a851..c0cd3ce 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2172,8 +2172,18 @@
 						if (tsk)
 							kthread_stop(tsk);
 					}
-				} else
+				} else {
 					cFYI(1, ("No session or bad tcon"));
+					if ((pSesInfo->server) &&
+					    (pSesInfo->server->tsk)) {
+						struct task_struct *tsk;
+						force_sig(SIGKILL,
+							pSesInfo->server->tsk);
+						tsk = pSesInfo->server->tsk;
+						if (tsk)
+							kthread_stop(tsk);
+					}
+				}
 				sesInfoFree(pSesInfo);
 				/* pSesInfo = NULL; */
 			}