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-rw-r--r--fs/cifs/sess.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index ed150efbe27..b537fad3bf5 100644
--- 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)) {