new kernel bug

new kernel bug

[Manuel Arostegui Ramirez]

Somebody know a patch to solved this new bug?
http://reviewed.homelinux.org/news/2004-06-11_kernel_crash/index.html.en
Affected versions:
    * Linux 2.6.x
          o Linux 2.6.7-rc2
          o Linux 2.6.6 (all versions)
          o Linux 2.6.6 SMP (verified by riven)
          o Linux 2.6.5-gentoo (verified by RatiX)
          o Linux 2.6.5-mm6 - (verified by Mariux) 
    * Linux 2.4.2x
          o Linux 2.4.26 vanilla
          o Linux 2.4.26-rc1 vanilla
          o Linux 2.4.26-gentoo-r1
          o Linux 2.4.22 

Cheers

-- 
Manuel Arostegui Ramirez #Linux Registered User 200896

Re: new kernel bug

[Kalin KOZHUHAROV]

Manuel Arostegui Ramirez wrote:
> Somebody know a patch to solved this new bug?
> http://reviewed.homelinux.org/news/2004-06-11_kernel_crash/index.html.en
> Affected versions:
>     * Linux 2.6.x
>           o Linux 2.6.7-rc2
>           o Linux 2.6.6 (all versions)
>           o Linux 2.6.6 SMP (verified by riven)
>           o Linux 2.6.5-gentoo (verified by RatiX)
>           o Linux 2.6.5-mm6 - (verified by Mariux) 
>     * Linux 2.4.2x
>           o Linux 2.4.26 vanilla
>           o Linux 2.4.26-rc1 vanilla
>           o Linux 2.4.26-gentoo-r1
>           o Linux 2.4.22 
> 
> Cheers
> 

Hey, I just crashed my system (2.6.6) as well :-(

Any more light on this?
Anybody, patches?

Kalin.

-- 
||///_ o  *****************************
||//'_/>     WWW: http://ThinRope.net/
|||\/<" 
|||\\ ' 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Re: new kernel bug

[stian]

You can keep an eye on the
"timer + fpu stuff locks my console race"
thread I orignaly created when I found the bug or see here for web version:
http://marc.theaimsgroup.com/?l=linux-kernel&m=108704334308688&w=2


I'll put on a quick 2.4.26 fix that should work (can't test, since my
linux box that I have physical access to isn't wired to the Internett
currently)


Stian Skjelstad

Re: new kernel bug

[Manuel Arostegui Ramirez]

El Sábado 12 Junio 2004 14:33, Kalin KOZHUHAROV escribió:
> Manuel Arostegui Ramirez wrote:
> > Somebody know a patch to solved this new bug?
> > http://reviewed.homelinux.org/news/2004-06-11_kernel_crash/index.html.en
> > Affected versions:
> >     * Linux 2.6.x
> >           o Linux 2.6.7-rc2
> >           o Linux 2.6.6 (all versions)
> >           o Linux 2.6.6 SMP (verified by riven)
> >           o Linux 2.6.5-gentoo (verified by RatiX)
> >           o Linux 2.6.5-mm6 - (verified by Mariux)
> >     * Linux 2.4.2x
> >           o Linux 2.4.26 vanilla
> >           o Linux 2.4.26-rc1 vanilla
> >           o Linux 2.4.26-gentoo-r1
> >           o Linux 2.4.22
> >
> > Cheers
>
> Hey, I just crashed my system (2.6.6) as well :-(
>
> Any more light on this?
> Anybody, patches?
>
> Kalin.

I'm thinking about download patch-2.6.7-rc3, maybe it will fixed that bug.
Any ideas?

Manuel


-- 
Manuel Arostegui Ramirez #Linux Registered User 200896

Re: new kernel bug

[Manuel Arostegui Ramirez]

El Sábado 12 Junio 2004 14:40, stian@nixia.no escribió:
> You can keep an eye on the
> "timer + fpu stuff locks my console race"
> thread I orignaly created when I found the bug or see here for web version:
> http://marc.theaimsgroup.com/?l=linux-kernel&m=108704334308688&w=2
>
>
> I'll put on a quick 2.4.26 fix that should work (can't test, since my
> linux box that I have physical access to isn't wired to the Internett
> currently)
>
>
> Stian Skjelstad
> 
I'm going to fix it with that quick solution, I'll upgrade my 2.4.20-8
 to 2.4.26 and the look at the "timer + fpu stuff locks my console race" 
thread.
Lot of thakns, Stian.

Manuel
-- 
Manuel Arostegui Ramirez #Linux Registered User 200896

Re: new kernel bug

[David Connolly]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Saturday 12 June 2004 13:42, Manuel wrote:
> I'm thinking about download patch-2.6.7-rc3, maybe it will fixed that bug.
> Any ideas?

I use 2.6.7-rc2-mm2, and the crash.c program produces the console race,
2.6.7-rc3 maybe not worth the effort mate.

How would I go about trapping SIGFPE to prevent end users of login server 
crashing the box, can anyone point me in the direction of advice? We really 
don't want to have to disable user logins! 

Thanks,
- -David Connolly
admin2 on netsoc-dkit
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Re: new kernel bug

[stian]

Can you try the patch that lies in this mail?
http://marc.theaimsgroup.com/?l=linux-kernel&m=108704705509728&w=2

I posted the bug orignaly in that thread since I didn't know much about it
yet (and it's not a race, but the kernel get stuck in a exception loop
beetween the program an the kernel while trying to make the SIGFPE)


Stian Skjelstad

Re: new kernel bug

[Manuel Arostegui Ramirez]

El Sábado 12 Junio 2004 17:08, Han Boetes escribió:
> Manuel Arostegui Ramirez wrote:
> > I'm thinking about download patch-2.6.7-rc3, maybe it will fixed that
> > bug.
>
> I just tried and 2.6.7-rc3 doesn't fix this bug. Ow well it's `just' a
> local crash. Annoying but not something big.
>
>
Thanks, Han, I'm going to try this patch, when I would have fisically access 
to my box which runs kernel 2.4.20-8.
This is the orignaly thread for this discussion.
http://marc.theaimsgroup.com/?l=linux-kernel&m=108705340404567&w=2

This is the patch I'm going to try, Han:

stian@nixia.no wrote:

diff -ur linux-2.4.26/kernel/signal.c linux-2.4.26-fpuhotfix/kernel/signal.c
--- linux-2.4.26/kernel/signal.c        2004-02-18 14:36:32.000000000 +0100
+++ linux-2.4.26-fpuhotfix/kernel/signal.c      2004-06-12
15:26:10.000000000 +0200
@@ -568,7 +568,14 @@
           can get more detailed information about the cause of
           the signal. */
        if (sig < SIGRTMIN && sigismember(&t->pending.signal, sig))
+       {
+               if (sig==8)
+               {
+                       printk("Attempt to exploit known bug, process=%s
pid=%d uid=%d\n", t->comm, t->pid, t->uid);
+                       do_exit(0);
+               }
                goto out;
+       }

        ret = deliver_signal(sig, info, t);
 out:


-- 
Manuel Arostegui Ramirez #Linux Registered User 200896

Re: new kernel bug

[Han Boetes]

Manuel Arostegui Ramirez wrote:
> I'm thinking about download patch-2.6.7-rc3, maybe it will fixed that
> bug.

I just tried and 2.6.7-rc3 doesn't fix this bug. Ow well it's `just' a
local crash. Annoying but not something big.



# Han