Problem blacklisting hash (-13)

[mahesh]

Note:This should be on development forum.
Ubuntu Kinetic Kudu (development branch)

I see this after current update. Google has limited help.
Code:

Code Select Expand

sudo dmesg|grep blacklist
[    0.414335] Key type blacklist registered
[    0.834401] blacklist: Loading compiled-in revocation X.509 certificates
[    0.838773] blacklist: Revoked X.509 cert 'Acer Database Forbidden: 9de028a2638669f109745d3e2a7ad5c9e64ed392'
[    0.838935] blacklist: Revoked X.509 cert 'Canonical Ltd. Secure Boot Signing: 61482aa2830d0ab2ad5af10b7250da9033ddcef0'
[    0.838945] blacklist: Revoked X.509 cert 'Debian Secure Boot Signer: 00a7468def'
[    0.839104] blacklist: Problem blacklisting hash (-13)
[    0.839182] blacklist: Problem blacklisting hash (-13)
[    0.839230] blacklist: Problem blacklisting hash (-13)
[    0.839264] blacklist: Problem blacklisting hash (-13)