[Bug 1930917] Re: Latest isc-dhcp-server rejects proper dhcpd.conf

[Marc Deslauriers]

I can confirm the update introduced a regression on Hirsute (and Impish
I presume). Focal and Groovy work properly. Unfortunately, it's not
related to the security patch, but it stems from the package being
rebuilt with the newer toolchain in Hirsute, so removing the patch won't
fix the issue.

I am currently investigating how to fix this.

** Also affects: isc-dhcp (Ubuntu Hirsute)
   Importance: Undecided
       Status: New

** Also affects: isc-dhcp (Ubuntu Impish)
   Importance: Undecided
       Status: Confirmed

** Changed in: isc-dhcp (Ubuntu Hirsute)
       Status: New => Confirmed

** Changed in: isc-dhcp (Ubuntu Hirsute)
     Assignee: (unassigned) => Marc Deslauriers (mdeslaur)

** Changed in: isc-dhcp (Ubuntu Impish)
     Assignee: (unassigned) => Marc Deslauriers (mdeslaur)

** Changed in: isc-dhcp (Ubuntu Hirsute)
   Importance: Undecided => Critical

** Changed in: isc-dhcp (Ubuntu Impish)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1930917

Title:
  Latest isc-dhcp-server rejects proper dhcpd.conf

Status in isc-dhcp package in Ubuntu:
  Confirmed
Status in isc-dhcp source package in Hirsute:
  Confirmed
Status in isc-dhcp source package in Impish:
  Confirmed

Bug description:
  Ubuntu 21.04 on Raspberry Pi. isc-dhcp-server was working just fine
  with version V4.4.1-2.2-ubuntu6.

  I got updated to V4.4.1-2.2ubuntu6.1 and now isc-dhcp-server refuses
  to start with the error "Can't clone pool group".

  I backed off to the prior version and it's working as before, so
  something in the V4.4.1-2.2ubuntu6.1 update has broken config file
  parsing.

  Here's the subnet section of the failing config. Removing the "pool"
  declaration from the subnet declaration eliminates the error, but of
  course, that's not a working configuration.

  subnet 192.168.92.0 netmask 255.255.255.0 {
      option domain-search "foo.com", "dyn.foo.com";
      option broadcast-address 192.168.92.255;
      allow duplicates;
      ddns-updates off;
      pool {
          ddns-updates on;
          allow unknown-clients;
          option domain-name "dyn.foo.com";
          ddns-rev-domainname "dhcp";
          default-lease-time 86400;
          max-lease-time 86400;
          range 192.168.92.101 192.168.92.127;
      }
  }

  This was also noted at least twice in the Ubuntu forums:
  https://ubuntuforums.org/showthread.php?t=2462984 and
  https://ubuntuforums.org/showthread.php?t=2462930

  Thanks

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