Comment 18 for bug 1124250

@blkperl

William, could you please confirm that you are using kernel at least 3.13.0-35.62 (this is a solution to #1344405 which may also cause similar effects).

Could you also please provide the output of:
$ sudo cat /proc/key-users

You may also try to increase values (beside their root_* counterparts):
kernel.keys.maxkeys=10000
kernel.keys.maxbytes=200000

Regards,
Dariusz