Public bug reported:

When running the following script:
 on the 4.15.0-43-generic kernel it leads to a kernel panic.
Tested the same with 17.10 (4.13 kernel) and 18.10 (4.18 kernel) and no 
problems with those.

The issue was first mentioned in our forum
ip_set_hash_net.50138/#post-234532) on our own kernel that's based on
the Ubuntu 4.15. After further investigations neither Debian 9 (4.9
kernel) nor Arch Linux (4.20 kernel) exhibited that same issue.

The attached log has the errors of one run of the ipset-nuclear script.
The kernel panic on the host side can also be triggered from an unprivileged 
container (Arch Linux, LXC)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "ipset-nuclear-panic.log"

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  ipset kernel error: 4.15.0-43-generic

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