On Sun, Jun 13, 1999 at 12:17:23PM +0400, Konstantin Boldyshev wrote:
>
> Strange things contunue to happen.. If I am on runlevel 1 or
> in single user mode - such program also causes segfault (just
> as usual kernel), when I get to runlevel 3 - it hangs and
> becomes immortal..
>
> As far as I remember 2.2.9-xxmdk has several patches applied..
> What are they? May be this is mandrake kernel misconfiguration?
>
> Another strange thing: on runlevel 3 such program causes core dump
> (at least it tries to do it, but core is 0 bytes), on runlevel 2
> or S - does not, only Segmentation Fault message.
>
> This is really potential exploit.
> simple example: any user can write a program that simply allocates 100 meg
> of memory, and no one can kill it. Or a program that allocates 1 meg of
> memory, and then run it hundred times..
>
> Konstantin.
Hm, maybe I missed something here, but why don't you just build a new kernel on
your own?
Regards
tom
> > Yes... kaudioserver and sometimes kioslave too becomes immortal when I exit
> > from KDE in *ALL* 2.2.9 kernels (18, 19, 20, 23).
> > At my home only 2.2.7 work correctly.
> >
> > > I've noticed strange behaviour of 2.2.9-19mdk. Here is explanation:
> > >
> > > If sys_exit call in a user program is missing such program hangs and
> > > cannot be killed. At all (kill -9 and SysRq will not help). Even if you
> > > kill that terminal - program itself remains anyway. Only way to kill -
> > > reboot.
> > >
> > > This can lead to weird things..all can be done as nonpriveleged user.
> > >
> > > I've tested this with 2.0.36,2.2.1,2.2.8 and non mandrake 2.2.9 - such
> > > program just dumps core and exits. On 2.2.9-19mdk it becomes
> > > immortal.. also zero lenght core file is created..
>
--
"Everybody is someone else's newbie" (Marilyn Manson, edited)
Thomas 'tom' Berger, [EMAIL PROTECTED] No spam, no UCE. 'Nuff said.
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