[Bug 2091439] Re: Error loading iptables-netflow-dkms in Oracular

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https://bugs.launchpad.net/bugs/2091439

Title:
  Error loading  iptables-netflow-dkms in Oracular

Status in iptables-netflow package in Ubuntu:
  In Progress
Status in iptables-netflow source package in Oracular:
  In Progress

Bug description:
  [ Impact ]

  The driver iptables-netflow-dkms fails to load on Oracular, showing
  the following error:

  [  137.406830] ipt_NETFLOW version 2.6, srcversion 70A7B82AFE6B707B499C544
  [  137.406832] ipt_NETFLOW: hashsize 655360 (5120K)
  [  137.407495] netflow: registering: /proc/net/stat/ipt_netflow
  [  137.407498] netflow: registered: /proc/net/stat/ipt_netflow
  [  137.407499] netflow: registering: /proc/net/stat/ipt_netflow_snmp
  [  137.407500] netflow: registered: /proc/net/stat/ipt_netflow_snmp
  [  137.407500] netflow: registering: /proc/net/stat/ipt_netflow_flows
  [  137.407501] netflow: registered: /proc/net/stat/ipt_netflow_flows
  [  137.407503] sysctl table check failed: net/netflow/(null) procname is null
  [  137.407506] sysctl table check failed: net/netflow/(null) No proc_handler
  [  137.407507] netflow: can't register to sysctl
  [  137.407553] ipt_NETFLOW is not loaded.
  [  137.443800] ipt_NETFLOW version 2.6, srcversion 70A7B82AFE6B707B499C544
  [  137.443805] ipt_NETFLOW: hashsize 655360 (5120K)
  [  137.444752] netflow: registering: /proc/net/stat/ipt_netflow
  [  137.444755] netflow: registered: /proc/net/stat/ipt_netflow
  [  137.444756] netflow: registering: /proc/net/stat/ipt_netflow_snmp
  [  137.444758] netflow: registered: /proc/net/stat/ipt_netflow_snmp
  [  137.444758] netflow: registering: /proc/net/stat/ipt_netflow_flows
  [  137.444759] netflow: registered: /proc/net/stat/ipt_netflow_flows
  [  137.444784] sysctl table check failed: net/netflow/(null) procname is null
  [  137.444788] sysctl table check failed: net/netflow/(null) No proc_handler
  [  137.444790] netflow: can't register to sysctl
  [  137.444848] ipt_NETFLOW is not loaded.

  [ Test case ]

  Install iptables-netflow-dkms:

  $ sudo apt install iptables-netflow-dkms

  Load the module:

  $ sudo modprobe ipt_NETFLOW

  [ Fix ]

  Linux 6.11 does not allow to have empty elements
  at the end of the ctl_table arrays (sentinels) anymore.
  Therefore it is necessary to adjust the code accordingly.

  [ Regression potential ]

  We may experience networking-related regressions in systems that are
  using the iptables-netflow-dkms module.

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