Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

[linux-2.6] / fs / cifs / sess.c

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index ed150efbe27c93fbec1834767262453c47619e14..b537fad3bf50684c2b3405df74a69ea9dd9e29a3 100644 (file)
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -505,7 +505,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
                        unicode_ssetup_strings(&bcc_ptr, ses, nls_cp);
                } else
                        ascii_ssetup_strings(&bcc_ptr, ses, nls_cp);
-       } else if (type == Kerberos) {
+       } else if (type == Kerberos || type == MSKerberos) {
 #ifdef CONFIG_CIFS_UPCALL
                struct cifs_spnego_msg *msg;
                spnego_key = cifs_get_spnego_key(ses);
@@ -516,6 +516,15 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
                }
 
                msg = spnego_key->payload.data;
+               /* check version field to make sure that cifs.upcall is
+                  sending us a response in an expected form */
+               if (msg->version != CIFS_SPNEGO_UPCALL_VERSION) {
+                       cERROR(1, ("incorrect version of cifs.upcall (expected"
+                                  " %d but got %d)",
+                                  CIFS_SPNEGO_UPCALL_VERSION, msg->version));
+                       rc = -EKEYREJECTED;
+                       goto ssetup_exit;
+               }
                /* bail out if key is too long */
                if (msg->sesskey_len >
                    sizeof(ses->server->mac_signing_key.data.krb5)) {