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Description of problem:
With the default main.cf which has:

# Enable IPv4, and IPv6 if supported
inet_protocols = all

Booting with ipv6.disable=1 we can see constant AVCs:

type=AVC msg=audit(1481628221.412:81): avc:  denied  { module_request } for  pid=1597 comm="postfix" kmod="net-pf-10" scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
type=AVC msg=audit(1481628221.815:84): avc:  denied  { module_request } for  pid=1773 comm="postsuper" kmod="net-pf-10" scontext=system_u:system_r:postfix_master_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
type=AVC msg=audit(1481628222.002:92): avc:  denied  { module_request } for  pid=1874 comm="qmgr" kmod="net-pf-10" scontext=system_u:system_r:postfix_qmgr_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
type=AVC msg=audit(1481628222.010:94): avc:  denied  { module_request } for  pid=1873 comm="pickup" kmod="net-pf-10" scontext=system_u:system_r:postfix_pickup_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system

Please close this if you consider this being a configuration issue (but given the comment in the configuration file this might be something to adjust). Thanks.

Actually, I see similar AVC from PCP and chronyd as well. Re-assigning to selinux-policy, probably best to fix there (if at all). Thanks.

Thank you Marko, 
This AVC will be dontaudited.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1861