Bug#434752: Kernel hangs when I echo 0 > /proc/sys/vm/vdso_enabled

[Oleg Verych <olecom@flower.upol.cz>]

* Date: Thu, 26 Jul 2007 15:21:49 +0200
>
> Package: linux-2.6
> Version: 2.6.22-2
> Severity: normal
[--]
>  Summary: echo 0 > /proc/sys/vm/vdso_enabled hangs my kernel.
>
>  Since some months, I get unusable backtraces from gdb; I was pointed at
>  an OpenSuse bug at:
>     <https://bugzilla.novell.com/show_bug.cgi?id=258433>
>  which suggests disabling VDSO.  My value of /proc/sys/vm/vdso_enabled
>  is 2 before I try, and the system hangs shortly after I echo 0 in that
>  tunable.

<http://mid.gmane.org/20070405045843.441322903@goop.org>

Here you can find full Cc list of all heavy-lifters in the Linux kernel
today (mis) doing that vDSO stuff all over last year. Try to make good
bugreport send and see what will happened.

>  The important issue I'd like to see fixed is this backtrace issue, but
>  I'm reporting this crash as I think the kernel shouldn't crash and
>  because I'm using this tunable to diagnose the backtrace issue.

A debugger was mentiond here, if you can debug this/help, contact those
guys:

<http://mid.gmane.org/20070303173834.GB249@tv-sign.ru>
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