netfilter buglog - Feb 2019 - [Bug 1323] New: failure to run on kernels with certian kconfig options set

https://bugzilla.netfilter.org/show_bug.cgi?id=1323

            Bug ID: 1323
           Summary: failure to run on kernels with certian kconfig options
                    set
           Product: iptables
           Version: unspecified
          Hardware: x86_64
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5
         Component: iptables
          Assignee: netfilter-buglog at lists.netfilter.org
          Reporter: mthode at mthode.org

I have not narrowed it down yet, but have been able to narrow it down to
differing kconfigs.

stracing gives me this failure

getsockopt(4, SOL_IP, IPT_SO_GET_INFO, 0x7fff867b2ba0, [84]) = -1 ECHILD (No
child processes)

and this when working

getsockopt(4, SOL_IP, IPT_SO_GET_INFO,
"nat\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
[84]) = 0

I'll attach kconfigs, and straces

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--- Comment #1 from Matthew Thode <mthode at mthode.org> ---
Created attachment 554
  --> https://bugzilla.netfilter.org/attachment.cgi?id=554&action=edit
strace failure

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--- Comment #2 from Matthew Thode <mthode at mthode.org> ---
Created attachment 555
  --> https://bugzilla.netfilter.org/attachment.cgi?id=555&action=edit
strace success

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--- Comment #3 from Matthew Thode <mthode at mthode.org> ---
Created attachment 556
  --> https://bugzilla.netfilter.org/attachment.cgi?id=556&action=edit
working kconfig (taken from archlinux)

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--- Comment #4 from Matthew Thode <mthode at mthode.org> ---
Created attachment 557
  --> https://bugzilla.netfilter.org/attachment.cgi?id=557&action=edit
failing kconfig

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Matthew Thode <mthode at mthode.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://bugs.gentoo.org/678
                   |                            |044
            Version|unspecified                 |1.6.x

--- Comment #5 from Matthew Thode <mthode at mthode.org> ---
I've also tested from git master.  gcc 7.3.0 and 8.2.0.  The error started
occuring with 4.20 kernels (with the failing kconfig).

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--- Comment #6 from Matthew Thode <mthode at mthode.org> ---
5.0.0-rc6+ ( 2fee036af043fa07ab19cbe8a7350fc685bd8be1 ) works as well, so the
issue seems limited to 4.20

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Matthew Thode <mthode at mthode.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|failure to run on kernels   |iptables-save failure on
                   |with certian kconfig        |kernels where
                   |options set                 |CONFIG_BPFILTER is set

--- Comment #7 from Matthew Thode <mthode at mthode.org> ---
https://bugzilla.redhat.com/show_bug.cgi?id=1645370 pointed me to
CONFIG_BPFILTER

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