[CIFS] oid should also be checked against class in cifs asn

The oid coming back from asn1_header_decode is a primitive object so
class should be checked to be universal.

Acked-by: Love Hörnquist Åstrand <lha@kth.se>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index 6bb440b257b..669d0640b6d 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -494,7 +494,8 @@ decode_negTokenInit(unsigned char *security_blob, int length,
                 /*      remember to free obj->oid */
                 rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);
                 if (rc) {
-                        if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {
+                        if ((tag == ASN1_OJI) && (con == ASN1_PRI) &&
+                            (cls == ASN1_UNI)) {
                                 rc = asn1_oid_decode(&ctx, end, &oid, &oidlen);
                                 if (rc) {
                                         rc = compare_oid(oid, oidlen,