Strange logs

[mbedyn]

hello everybody… I have got strange entry in my firewall logs since yesterday every one hour...
something like this below.
latest snapshot 12.23

Dec 31 08:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 07:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 07:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 06:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 06:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 05:00:00 kernel: pfr_get_astats: corruption detected (-1).
Dec 31 05:00:00 kernel: pfr_get_astats: corruption detected (-1).

??? any ideas? what does this mean?