netfilter buglog - Jun 2006 - [Bug 485] Stresstesting ipset crashes kernel

https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=485





------- Additional Comments From bugzilla.netfilter@neufeind.net  2006-06-06
02:00 MET -------
I tried to track down the problem meanwhile.

It turns out that e.g. in a row of roughly 480 "ipset -A" (nethash) in
a row the
system once hangs at around 300 executed statements while it hangs around 370
the next time. So this does not seem to be reproducable.

But I did the same tries on an otherwise identical i386-system with the same
centos-libraries etc - just recompiled the ipset-libs I added/backported. On
i386 it works fine (even 30 times all 480 adds in a row), while it crashes on
x86_64.
Could there be a bug related to the architecture (64-bit)?

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https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=485





------- Additional Comments From bugzilla.netfilter@neufeind.net  2006-06-06
02:03 MET -------
Oh, just for the record: The "workaround"-part of my first description
did not
proof as reliable - even in those cases later the system crashed during repeated
runs.

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https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=485


kadlec@netfilter.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED




------- Additional Comments From kadlec@netfilter.org  2006-06-06 10:52 MET
-------
I suspect too that it's an architecture-dependent bug - I have never tried
ipset
on 64-bit systems. Is there any kernel message related to the crash/hang?


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https://bugzilla.netfilter.org/bugzilla/show_bug.cgi?id=485


bugzilla.netfilter@neufeind.net changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |WORKSFORME




------- Additional Comments From bugzilla.netfilter@neufeind.net  2006-06-06
11:12 MET -------
Unfortunately I can't "see" an error. Any oops that might occur on
the console
currently I can't read since it's a remote machine :-)

During the last hours I reinstalled most parts of the libraries, compiled my
"backported" ipset again, did some stresstesting. To my surprise so
far the
system did not yet crash again. Interesting.

For now I'll make this bug a "works-for-me" and will reopen it if
needed.

Thank you very much for the quick feedback.

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