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    Subject[PATCH 4.9 31/64] SMB3: Warn user if trying to sign connection that authenticated as guest
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Steve French <smfrench@gmail.com>

    commit c721c38957fb19982416f6be71aae7b30630d83b upstream.

    It can be confusing if user ends up authenticated as guest but they
    requested signing (server will return error validating signed packets)
    so add log message for this.

    Signed-off-by: Steve French <smfrench@gmail.com>
    Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    fs/cifs/smb2pdu.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/fs/cifs/smb2pdu.c
    +++ b/fs/cifs/smb2pdu.c
    @@ -1010,6 +1010,8 @@ SMB2_sess_setup(const unsigned int xid,
    while (sess_data->func)
    sess_data->func(sess_data);

    + if ((ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) && (ses->sign))
    + cifs_dbg(VFS, "signing requested but authenticated as guest\n");
    rc = sess_data->result;
    out:
    kfree(sess_data);

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