VRRP causes CARP to spew logs
When VRRP exists on the same broadcast domain as a host with CARP, the logs get flooded with:
carp_input: received len 20 < sizeof(struct carp_header)
It's hard coded in ip_carp.c. It's probably safe to remove the log entirely, though having all those CARP logs sysctl-controlled would be ideal.