[Buildroot] [Bug 6668] New: iptables limit module alignment problem on mips64

[Buildroot] [Bug 6668] New: iptables limit module alignment problem on mips64

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6668

           Summary: iptables limit module alignment problem on mips64
           Product: buildroot
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: cassiano at idbinfo.com.br
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


iptables limit module causes an alignment error on a 64-bit kernel and 32-bit
userland. After inserting a rule containing limit, any other operation results
in the following message on kernel dmesg:

x_tables: ip_tables: limit.0 match: invalid size 40 (kernel) != (user) 48

looking at the limit code, its the only one module that uses CONFIG_COMPAT for
legacy code.

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[Buildroot] [Bug 6668] iptables limit module alignment problem on mips64

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6668

Gustavo Zacarias <gustavo@zacarias.com.ar> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX
           Severity|critical                    |normal

--- Comment #1 from Gustavo Zacarias <gustavo@zacarias.com.ar> 2013-11-09 21:55:41 UTC ---
1) This isn't critical - if you want something fixed then you should at least
be polite and don't think about your little corner only.
Critical would be something minimal not building, for example a basic root
filesystem with just busybox with a default configuration.
Iptables is just one package among many, and the failure is a subset of the
functionality of iptables on a subset of many architectures.

2) This is an upstream bug, unless there's a patch or knob to signal the
iptables build about mixed 64/32 kernel/userland (which was present several
releases ago IIRC) or fixing this issue then there's nothing we can do on our
side alone - you should contact the netfilter devels about this issue since
it's a bug.

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[Buildroot] [Bug 6668] iptables limit module alignment problem on mips64

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6668

--- Comment #2 from Cassiano Martin <cassiano@idbinfo.com.br> 2013-11-10 21:18:06 UTC ---
I`m not Thinking about my "Little corner".

Anyway I`m not submitting any patches anymore.


Thanks for your "Attention"

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[Buildroot] [Bug 6668] iptables limit module alignment problem on mips64

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6668

--- Comment #3 from Gustavo Zacarias <gustavo@zacarias.com.ar> 2013-11-11 12:12:46 UTC ---
On a second look i was somewhat rude, so sorry about that.

This is a volunteer effort and people labeling problems as critical when they
aren't is sometimes very draining, it's like people going all "me me me" and
wanting to be the center of the universe or something - when in fact it'll
probably get them ignored on a perpetual basis when they do that too much.

Taking that into consideration most of the contributors don't have mips64
boards to test things on and the qemu emulation is mostly broken so only basic
things can be tested (bare shell, can't do much), and only mips64 N32 ABI uses
mixed 64/32-bit kernel/userspace from all the combinations supported at the
moment, so we can't even reproduce this issue.

Again, sorry, and i suggest you take it up with the netfilter dev team at their
bugzilla or their mailing list (probably better).
And please do provide them with details including kernel & iptables version.

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[Buildroot] [Bug 6668] iptables limit module alignment problem on mips64

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=6668

--- Comment #4 from Cassiano Martin <cassiano@idbinfo.com.br> 2013-11-11 16:23:24 UTC ---
I got it.

Wasn't my intention to get attention when I marked it as a critical bug. Sorry
about that. I really not cared to check as this failure is upstream, and not a
buildroot fault.

Thanks

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