[Bug 1212] New: excessive memory usage with kernel 4.14

[bugzilla-daemon at netfilter.org]

https://bugzilla.netfilter.org/show_bug.cgi?id=1212

            Bug ID: 1212
           Summary: excessive memory usage with kernel 4.14
           Product: ipset
           Version: unspecified
          Hardware: All
                OS: other
            Status: NEW
          Severity: major
          Priority: P5
         Component: default
          Assignee: netfilter-buglog at lists.netfilter.org
          Reporter: thomas.schwark at gmail.com

Hey,

I´m sorry in advance I am not able to fix this but installing kernel 4.14 and
above leads to an excessive use of memory tested on two machines. A system that
needs around 500 MB now uses around 15 GB out of 16 GB.

The archwiki here

https://wiki.archlinux.org/index.php/Ipset

says to use this script to update sources:

https://github.com/ilikenwf/pg2ipset/blob/master/ipset-update.sh

As soon as I run the script manually with kernel 4.14 and newer the excessive
memory usage starts again. If I then stop ipset service the memory usage keeps
being high. Reboot without running the script solves it. It does not happen
with 4.13 kernel series.

There was a bug report opened here:

https://bugs.archlinux.org/task/56574#comment165267

and the problem was tracked down to this commit:
When reverting commit 48596a8ddc46f96afb6a2cd72787cb15d6bb01fc
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/net/netfilter/ipset?id=48596a8ddc46f96afb6a2cd72787cb15d6bb01fc
and rebuilding the kernel without the commit everything works as expected again
and the problem is gone.

Hope this helps to solve it.

Thanks in advance.

Kind regards


Tom

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