sctp_diag: Unknown symbol sctp_for_each_endpoint

Issue

• The following messages are logged in kernel ring buffer (dmesg):

[144798.624522] sctp_diag: Unknown symbol sctp_for_each_endpoint (err 0)
[144798.624533] sctp_diag: Unknown symbol sctp_get_sctp_info (err 0)
[144798.624547] sctp_diag: Unknown symbol sctp_for_each_transport (err 0)
[144798.624567] sctp_diag: Unknown symbol sctp_transport_lookup_process (err 0)

• Modules 'dccp' and 'sctp' are blacklisted on this server:

[/etc/modprobe.d/sctp.conf]

install sctp /bin/true

[/etc/modprobe.d/dccp.conf]

install dccp /bin/true

• How to prevent these messages from being logged?