[uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Catalin(ux aka Dino) BOIE]

Hello!

This is what I get when I run a 2.6.8.1 guest:

tracing thread pid = 20281
Linux version 2.6.8.1-1um (root@dino) (gcc version 3.3.4) #1 Mon Sep 6 
14:03:34 EEST 2004
Built 1 zonelists
Kernel command line: mem=64M root=98:0
PID hash table entries: 16 (order 4: 128 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 61072k available
Calibrating delay loop... 1648.23 BogoMIPS
Security Scaffold v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
Checking for /dev/anon on the host...Not available (open failed with errno 
2)
NET: Registered protocol family 16
TC classifier action (bugs to netdev@oss.sgi.com cc hadi@cyberus.ca)
mconsole (version 2) initialized on /root/.uml/cGozAB/mconsole
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
Initializing Cryptographic API
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
netconsole: not configured, aborting
NET: Registered protocol family 2
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 8192)
NET: Registered protocol family 1
NET: Registered protocol family 10
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
NET: Registered protocol family 15
Initializing software serial port version 1
Kernel panic: fix_range fixing wrong address space, current = 0xa3fba760
  <6>SysRq : Show Regs

EIP: 0073:[<a01a2d9b>] CPU: 0 Not tainted ESP: 007b:a0369688 EFLAGS: 
00000246
     Not tainted
EAX: 00000000 EBX: 00000001 ECX: a036973c EDX: a03696bc
ESI: 00000008 EDI: 00000001 EBP: a03696a4 DS: 007b ES: 007b
Call Trace: [<a0101a04>] [<a001a30f>] [<a0030e41>] [<a003c676>] 
[<a0030425>]
    [<a00304a7>] [<a0015a08>] [<a001c6e6>] [<a001c65b>] [<a001cb89>] 
[<a0019349>]
    [<a001b452>] [<a01e5c44>] [<a0032b2e>] [<a0032ad8>] [<a00115e8>] 
[<a003f479>]
    [<a003f450>] [<a01a29e0>] [<a003f3f0>] [<a00159da>] [<a0017ccd>] 
[<a003f3f0>]
    [<a00159bf>] [<a002c001>] [<a001b583>] [<a003f3f0>] [<a001b628>] 
[<a001b685>]
    [<a01a2d28>] [<a01a2d9b>]
sleeping process 20369 got unexpected signal : 10


If I try to run "./K2.6.8.1 debug" gdb hangs.

Can you help me investigate this?

Thank you!
---
Catalin(ux aka Dino) BOIE
catab at deuroconsult.ro
http://kernel.umbrella.ro/


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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Michael Richardson]

>>>>> "ux" == ux aka Dino <Catalin> writes:
    ux> This is what I get when I run a 2.6.8.1 guest:

    ux> Kernel panic: fix_range fixing wrong address space, current = 0xa3fba760
    ux> <6>SysRq : Show Regs

    ux> EIP: 0073:[<a01a2d9b>] CPU: 0 Not tainted ESP: 007b:a0369688 EFLAGS: 00000246
    ux> Not tainted

  I get variously different failures, mostly at the same place.

--
]       ON HUMILITY: to err is human. To moo, bovine.                         [
]   Michael Richardson,            Seaway Networks Corporation                [
]   michael@seawaynetworks.com     http://www.seawaynetworks.com/             [
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [


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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Ralph Paßgang]

Am Dienstag 07 September 2004 15:35 schrieb Michael Richardson:
> >>>>> "ux" == ux aka Dino <Catalin> writes:
>
>     ux> This is what I get when I run a 2.6.8.1 guest:
>
>     ux> Kernel panic: fix_range fixing wrong address space, current =
> 0xa3fba760 ux> <6>SysRq : Show Regs
>
>     ux> EIP: 0073:[<a01a2d9b>] CPU: 0 Not tainted ESP: 007b:a0369688
> EFLAGS: 00000246 ux> Not tainted
>
>   I get variously different failures, mostly at the same place.
>

I made some experience with 2.6 kernel and I think this are the two most 
common problems for a not correct starting uml:

1) in the fs of the uml you have to move /lib/tls to /lib/tls.disable (to 
disable ntpl)

2) if you don't use the skas mode, you HAVE to mount /tmp as tmpfs,  otherwise 
the uml will not start (kernel panics at diffrent locations while booting, 
smetimes it even works without tmpfs)

Point 2 seems to be a bug, but I don't analysed it enough to say why this 
happens...

--Ralph


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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Michael Richardson]

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


    gang> common problems for a not correct starting uml:

    gang> 1) in the fs of the uml you have to move /lib/tls to
    gang> /lib/tls.disable (to gang> disable ntpl)

  Thanks for the advice.
  I'll try it out and see what happens.
  The thing is that I don't have a /lib/tls* at all in my UML root.
(Yes, it is based upon a rather old distro)

    gang> 2) if you don't use the skas mode, you HAVE to mount /tmp as
    gang> tmpfs,  otherwise the uml will not start (kernel panics at
    gang> diffrent locations while booting,  
    gang> smetimes it even works without tmpfs)

  My /tmp is already tmpfs, and I do use skas mode anyway.

  I'm using 2.4.25 and 2.4.27 host kernels with the appropriate patches.

- --
]       ON HUMILITY: to err is human. To moo, bovine.                         [
]   Michael Richardson,            Seaway Networks Corporation                [
]   michael@seawaynetworks.com     http://www.seawaynetworks.com/             [
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: Finger me for keys

iD8DBQFBPhGP22r3dfT9QZERAgg2AJ9Pxl5mo5TG4P/Ttr7Sm0MCI4Jl5ACeOHUu
ByLGH7pIWtXpSn2a7qH3nv8=
=YHGx
-----END PGP SIGNATURE-----


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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Catalin(ux aka Dino) BOIE]

> I made some experience with 2.6 kernel and I think this are the two most
> common problems for a not correct starting uml:
>
> 1) in the fs of the uml you have to move /lib/tls to /lib/tls.disable (to
> disable ntpl)
>
> 2) if you don't use the skas mode, you HAVE to mount /tmp as tmpfs,  otherwise
> the uml will not start (kernel panics at diffrent locations while booting,
> smetimes it even works without tmpfs)
>
> Point 2 seems to be a bug, but I don't analysed it enough to say why this
> happens...

The kernel is not reaching the point to mount root filesystem.
I just ran ./linux without parameters and I get that.

>
> --Ralph
>
>
> -------------------------------------------------------
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---
Catalin(ux aka Dino) BOIE
catab at deuroconsult.ro
http://kernel.umbrella.ro/


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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Ali Almahdi]

Catalin(ux aka Dino) BOIE wrote:

>> I made some experience with 2.6 kernel and I think this are the two most
>> common problems for a not correct starting uml:
>>
>> 1) in the fs of the uml you have to move /lib/tls to /lib/tls.disable 
>> (to
>> disable ntpl)
>>
>> 2) if you don't use the skas mode, you HAVE to mount /tmp as tmpfs,  
>> otherwise
>> the uml will not start (kernel panics at diffrent locations while 
>> booting,
>> smetimes it even works without tmpfs)
>>
>> Point 2 seems to be a bug, but I don't analysed it enough to say why 
>> this
>> happens...
>
>
> The kernel is not reaching the point to mount root filesystem.
> I just ran ./linux without parameters and I get that.

Mount it as a loop back device to rename /lib/tls

>
>>
>> --Ralph
>>
>>
>> -------------------------------------------------------
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>>
>
> ---
> Catalin(ux aka Dino) BOIE
> catab at deuroconsult.ro
> http://kernel.umbrella.ro/
>
>
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Re: [uml-devel] Host: 2.6.7, guest: 2.6.8.1, without SKAS

[Catalin(ux aka Dino) BOIE]

>> The kernel is not reaching the point to mount root filesystem.
>> I just ran ./linux without parameters and I get that.
>
> Mount it as a loop back device to rename /lib/tls

Seems I'm not able to describe the problem correctly. :(
I intentionaly ran ./linux without parameters. Why? Because I tried with 
parameters and the same problem is still there.

So, the ./linux doesn't reach the point to mount the filesystem.
It crashed _before_!

How I can "read" the oops. What to do?
Thank you!

>
>> 
>>> 
>>> --Ralph
>>> 
>>> 
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>> 
>> ---
>> Catalin(ux aka Dino) BOIE
>> catab at deuroconsult.ro
>> http://kernel.umbrella.ro/
>> 
>> 
>> -------------------------------------------------------
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>
>

---
Catalin(ux aka Dino) BOIE
catab at deuroconsult.ro
http://kernel.umbrella.ro/


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