Acked-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
On Wed, Dec 3, 2014 at 6:26 AM, Sachin Prabhu <sprabhu@xxxxxxxxxx> wrote:
> A user complained that they were unable to login to their cifs share
> after a kernel update. From the wiretrace we can see that the server
> returns different UIDs as response to NTLMSSP_NEGOTIATE and NTLMSSP_AUTH
> phases.
>
> With changes in the authentication code, we no longer set the
> cifs_sess->Suid returned in response to the NTLM_AUTH phase and continue
> to use the UID sent in response to the NTLMSSP_NEGOTIATE phase. This
> results in the server denying access to the user when the user attempts
> to do a tcon connect.
>
> A test kernel containing patch was tested successfully by the user.
>
> Signed-off-by: Sachin Prabhu <sprabhu@xxxxxxxxxx>
> ---
> fs/cifs/sess.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
> index 57db63f..446cb7f 100644
> --- a/fs/cifs/sess.c
> +++ b/fs/cifs/sess.c
> @@ -1303,6 +1303,11 @@ sess_auth_rawntlmssp_authenticate(struct sess_data *sess_data)
> if (le16_to_cpu(pSMB->resp.Action) & GUEST_LOGIN)
> cifs_dbg(FYI, "Guest login\n"); /* BB mark SesInfo struct? */
>
> + if (ses->Suid != smb_buf->Uid) {
> + ses->Suid = smb_buf->Uid;
> + cifs_dbg(FYI, "UID changed! new UID = %llu\n", ses->Suid);
> + }
> +
> bytes_remaining = get_bcc(smb_buf);
> bcc_ptr = pByteArea(smb_buf);
> blob_len = le16_to_cpu(pSMB->resp.SecurityBlobLength);
> --
> 2.1.0
>
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