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-rw-r--r--fs/cifs/connect.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 8cf4a63..db9d55b 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1854,6 +1854,8 @@ cifs_put_smb_ses(struct cifsSesInfo *ses)
cifs_put_tcp_session(server);
}
+static bool warned_on_ntlm; /* globals init to false automatically */
+
static struct cifsSesInfo *
cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
{
@@ -1928,6 +1930,15 @@ cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
}
ses->cred_uid = volume_info->cred_uid;
ses->linux_uid = volume_info->linux_uid;
+
+ /* ntlmv2 is much stronger than ntlm security, and has been broadly
+ supported for many years, time to update default security mechanism */
+ if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
+ warned_on_ntlm = true;
+ cERROR(1, "default security mechanism requested. The default "
+ "security mechanism will be upgraded from ntlm to "
+ "ntlmv2 in kernel release 2.6.41");
+ }
ses->overrideSecFlg = volume_info->secFlg;
mutex_lock(&ses->session_mutex);
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