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Re: general protection: 4f00
For more details squid not run as root
#>ps -uax | grep squid
but squid use a lot of memory
and 3 days before crash i found the following in /var/log/messages.
I hope it will help in our investigation.
Aug 16 16:35:57 proxy squid[296]: WARNING: Exceeded 'cache_mem' size (16392K >
16384K)
Aug 16 16:35:57 proxy squid[296]: Perhaps you should increase cache_mem?
Aug 16 16:35:57 proxy squid[296]: storeGetMemSpace stats:
Aug 16 16:35:57 proxy squid[296]: 1 objects locked in memory
Aug 16 16:35:57 proxy squid[296]: 0 LRU candidates
Aug 16 16:35:57 proxy squid[296]: 0 were purged
Aug 16 16:35:57 proxy squid[296]: 0 were released
nobody 938 1.6 31.7 41424 40680 ? S 10:43 7:56 squid -sY
Evgeny Stambulchik wrote:
> Shlomi Fish <shlomif@vipe.technion.ac.il> wrote:
> > On Thu, 20 Aug 1998, Evgeny Stambulchik wrote:
> >
> > > Shlomi Fish <shlomif@vipe.technion.ac.il> wrote:
> > >
> > > > On Thu, 20 Aug 1998, Constantin Eizner wrote:
> > > >
> > > > > >From time ti time I get the following message and computer stop
> > > > > responding.
> > > >
> > > > This is one of two things:
> > > > 1. a buffer overflow or something like that in squid, that had a deadly
> > > > effect.
> > >
> > > Are we talking about Windows or a real OS?! How can a buggy program make a
> > > bug-free kernel (running on a stable hardware) crash?!
> > >
> >
> > If the program is ran as root it can crash the system in a thousand
> > different ways. (e.g: "rm -fr /").
>
> Well, of course; there is no protection against a man with a hammer as well. But
> you wrote "a buffer overflow or something like that in squid"; I don't think you
> really believe that the binary of the squid was trojan in this case.
>
> > Besides, every OS can have fatal buffer
> > overflows, including Linux. At least on an i386.
>
> Which should be treated as a bug in the OS.
>
> > Maybe VMS or MVS or other real-time or mainframe OSes do something to
> > ensure this thing cannot happen. I'm not sure that Pentium processors
> > offer enough functionality to prevent this, or that Linux is designed with
> > this in mind.
> >
> > And then again: who said the Linux kernel (or the i386 hardware for that
> > matter) is bug-free.
>
> Nobody did. Neither did I intend to state this. All what I wanted to say was: if
> an application makes an OS crash, than there is a bug in the OS (which doesn't
> mean the application is bug-free).
>
> Regards,
>
> Evgeny
>
> --
> ____________________________________________________________
> / Evgeny Stambulchik <fnevgeny@plasma-gate.weizmann.ac.il> \
> / Plasma Laboratory, Weizmann Institute of Science, Israel \ \
> | Phone : (972)8-934-3610 == | == FAX : (972)8-934-3491 | |
> | URL : http://plasma-gate.weizmann.ac.il/~fnevgeny/ | |
> | Finger for PGP key >=====================================+ |
> |______________________________________________________________|
--
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Computer Center of Haifa University Mount Carmel, Haifa 31905, Israel
------------------------------------------------------------------------------
Constantin Eizner | Tel. 972-4-8249299
Network Engineer | Fax. 972-8249177
Unix System Administrator | E-mail eizner@research.haifa.ac.il
______________________________________________________________________________
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