cifs: check hash calculating succeeded

calc_lanman_hash() could return -ENOMEM or other errors, we should check
that everything went fine before using the calculated key.

Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index a42e99c8e00e..538d9b55699a 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -710,6 +710,8 @@ sess_auth_lanman(struct sess_data *sess_data)
                 rc = calc_lanman_hash(ses->password, ses->server->cryptkey,
                                       ses->server->sec_mode & SECMODE_PW_ENCRYPT ?
                                       true : false, lnm_session_key);
+                if (rc)
+                        goto out;
 
                 memcpy(bcc_ptr, (char *)lnm_session_key, CIFS_AUTH_RESP_SIZE);
                 bcc_ptr += CIFS_AUTH_RESP_SIZE;