Does adjusting /etc/apparmor.d/usr.sbin.dhcpd to have:
owner @{PROC}/[0-9]*/comm r, owner @{PROC}/[0-9]*/task/[0-9]*/comm r,
resolve the issue for you? Be sure to load the policy into the kernel with: sudo apparmor_parser -r /etc/apparmor.d/usr.sbin.dhcpd before performing your testing.
Does adjusting /etc/apparmor. d/usr.sbin. dhcpd to have:
owner @{PROC}/[0-9]*/comm r, /[0-9]* /task/[ 0-9]*/comm r,
owner @{PROC}
resolve the issue for you? Be sure to load the policy into the kernel with: sudo apparmor_parser -r /etc/apparmor. d/usr.sbin. dhcpd before performing your testing.