Comment 5 for bug 1901373

@norm-audrey as I read it the proposed fix does not contain a ''' character. It is the single line

  @{PROC}/sys/net/ipv4/ip_local_port_range r,

do you perhaps also copy the following line?

  'lsb_release -rd':

That would indeed result in the reported error. I am not sure how the profile in comment #4 would fix the originally reported deny message except by causing dhcpd to not use the code path resulting in the denial.

As for the difference between the two profiles. They don't have a completely different form, both have evolved from a similar base so they have much in common but do have some differences. The profile from https://github.com/Harvie/AppArmor-Profiles/blob/master/usr.sbin.dhcpd is an older version of the one carried by the upstream project https://gitlab.com/apparmor/apparmor/-/blob/master/profiles/apparmor/profiles/extras/usr.sbin.dhcpd.

Beyond whitespace differences I see

different conf file locations

  /etc/dhcpd.conf r,
  /etc/named.d/* r,

vs.

  /etc/dhcp/dhcpd.conf r,
  /etc/dhcp/dhcpd6.conf r,
  /etc/bind/* r,

broader lease location in the old upstream version

  /var/lib/dhcp/{db/,}dhcpd.leases* rwl,

vs.

  /var/lib/dhcp/dhcpd6.leases* rwl,

support for ipv6 leases in your version

  /var/lib/dhcp/{db/,}dhcpd.leases* rwl,

vs

  /var/lib/dhcp/dhcpd.leases* rwl,
  /var/lib/dhcp/dhcpd6.leases* rwl,

note: current upstream has broader leases and ipv6

  /var/lib/dhcp/{db/,}dhcpd{6,}.leases* rwl,

different pid file location

  /{,var/}run/dhcpd.pid wl

vs.

  /{,var/}run/dhcp-server/dhcpd.pid wl,

Some of this could come down to system configuration of dhcpd.