Please always CC the list, other UML people could answer your questions,
and the answers could be useful to others in the future.
> Because of the our last conversation i downloaded the sources of the
> last kernel version, 2.6.19.2.
> I am preparing myself with all pertinent information to make my first
> kernel compiling.
> I think that Linuz Torwalds said that is the best version available
> and if something goes wrong during the kernel execution then certainly
> is an user fault.
I guess you could say that, although the situation is a bit different
with UML.
> What is the version of your host kernel ?
It varies. Depends on which machine.
> Is desirable that unl-kernel version match with the host kernel version ?
No. If at all possible use an up-to-date host and guest.
Note: there are issues with x86 host kernels >= 2.6.16
Antoine
>
> Regards
> Ernani
>
> 2007/2/1, Antoine Martin <[EMAIL PROTECTED]>:
>> Haywood Floyd wrote:
>> > Hi Antoine.
>> >
>> > You said below "..Maybe the part that isn't statically linked fails to
>> > load because of mismatch with your glibc version?".
>> > I just readed int the linux documentation project about that matter.
>> > Kernels configured using loadable modules need to find this modules in
>> > certain point.
>> /lib/modules/`uname -r`
>> > This make the kernel dependent (in certain way) of the
>> > filesystem.
>> > Am i right ? If so, then when we built an uml kernel and make it
>> > available we also must make available the matching file system ?
>> Yes, (if used) the modules must be added to the filesystem.
>>
>> > I had the experience of download kernels that you have built and try
>> > to use them with the filesystems available at uml home page. Sometimes
>> > the uml kernel works, sometimes doesnt.
>> > Could be it one possible motive ?
>> No, the kernels I build do not use modules.
>> That way, anyone can pick and choose any combination of kernel and fs
>> (well, that's the theory anyway)
>>
>> Antoine
>>
>>
>>
>> > That line of reasoning is correct ?
>> >
>> > Regards
>> > Ernani
>> >
>> > 2007/2/1, Antoine Martin <[EMAIL PROTECTED]>:
>> >> Pravin wrote:
>> >> > Thanx for reply.
>> >> >
>> >> > I changed my host kernel to 2.6.15 and tried to run those
>> >> precompiled and
>> >> > manually compiled 2.6.19.2 kernels. but I was facing same problem.
>> >> >
>> >> > {{{
>> >> > $ ./liunx ubd0=FedoraCore5-x86-root_fs
>> >> > Checking PROT_EXEC mmap in /tmp...OK
>> >> > Checking for the skas3 patch in the host:
>> >> > - /proc/mm...not found
>> >> > - PTRACE_FAULTINFO...not found
>> >> > - PTRACE_LDT...not found
>> >> > UML running in SKAS0 mode
>> >> >
>> >> > $
>> >> > }}}
>> >> >
>> >> >
>> >>
>> ------------------------------------------------------------------------
>> >> > I also tried to use older kernel for guest kernel
>> >> > I tried with precompiled kernel 2.6.14.4 from
>> >> > http://uml.nagafix.co.uk/kernels/kernel32-2.6.14.4-bs3
>> >> > but it also gave same problem.
>> >> >
>> >> > but in case of mannual compilation, there was some progress.
>> >> > I downloaded 2.6.14.7 and compiled it with UML.
>> >> > but then I got
>> >> >
>> >> > {{{
>> >> > $ ./linux ubd0=FedoraCore5-x86-root_fs
>> >> > ..
>> >> > ..
>> >> > ..
>> >> > VFS: Cannot open root device "98:0" or unknown-block(98,0)
>> >> > Please append a correct "root=" boot option
>> >> > Kernel panic - not syncing: VFS: Unable to mount root fs on
>> >> > unknown-block(98,0)
>> >> > }}}
>> >> > When previously (a week before) i got this problem, I was been
>> >> advised to
>> >> > move to newer version or kernel.
>> >> How about adding root=/dev/ubda to the linux command?
>> >>
>> >> So it looks like the versions that I have built don't work for you.
>> I am
>> >> not sure why. Maybe the part that isn't statically linked fails to
>> load
>> >> because of mismatch with your glibc version?
>> >> Jeff or Blaisorblade understand this better than I do. (CCed list)
>> >>
>> >> >
>> >>
>> -------------------------------------------------------------------------------------------------------------
>>
>>
>> >>
>> >> >
>> >> >
>> >> >
>> >> > Currently I am having kernel 2.6.19.2 compiled with ARCH=um and its
>> >> working
>> >> > fine.
>> >> > But SELinux is disabled.
>> >> >
>> >> > so, is it possible to change some kernel configuration parameters
>> and
>> >> > enable
>> >> > SELinux in same 2.6.19.2 kernel which is working ??
>> >> The SELinux options are in the Security section, just enable them.
>> >> If the kernel you compiled yourself works it should make little
>> >> difference.
>> >>
>> >>
>> >> Antoine
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> >
>> >> > On 2/1/07, Antoine Martin <[EMAIL PROTECTED]> wrote:
>> >> >>
>> >> >> Hi,
>> >> >>
>> >> >> You are not doing anything wrong, if you check at the top of the
>> >> page at
>> >> >> http://uml.nagafix.co.uk/
>> >> >> It does mention the fact that there are problems with recent host
>> >> >> kernels (>=2.6.16). I can only suggest that you try an older host
>> >> kernel
>> >> >> until the x86 bug is fixed.
>> >> >>
>> >> >> Antoine
>> >> >>
>> >> >> (I'll top post, bottom-post or inline-reply whenever I feel like
>> it)
>> >> >>
>> >> >> Pravin wrote:
>> >> >> > Hi,
>> >> >> > I was trying to make SELinux work on UML with 32 bit kernel
>> >> 2.6.19.2.
>> >> >> >
>> >> >> > I downloaded the latest kernel souce code from
>> >> >> > http://www.kernel.org/pub/linux/kernel/v2.6/
>> >> >> >
>> >> >> >
>> >> >> > As, it is supposed to have both UML and SELinux within it.
>> >> >> >
>> >> >> > I got the ".config" file from
>> >> >> > http://uml.nagafix.co.uk/kernels/kernel32-2.6.19.2.config
>> >> >> >
>> >> >> >
>> >> >> > After compilation as per instructions from page
>> >> >> > http://uml.nagafix.co.uk/kernels/
>> >> >> > When I ran this kernel, it stoped immediately after printing
>> "UML
>> >> >> running
>> >> >> > in SKAS0 mode" without throwing any error message.
>> >> >> >
>> >> >> > I got following as output when I ran UML kernel complied from
>> >> 2.6.19.2
>> >> >> >
>> >> >> > {{{
>> >> >> > $ ./linux ubd0=FedoraCore5-x86-root_fs
>> >> >> > Checking that ptrace can change system call numbers...OK
>> >> >> > Checking syscall emulation patch for ptrace...OK
>> >> >> > Checking advanced syscall emulation patch for ptrace...OK
>> >> >> > Checking for tmpfs mount on /dev/shm...nothing mounted on
>> /dev/shm
>> >> >> > Checking PROT_EXEC mmap in /tmp/...OK
>> >> >> > Checking for the skas3 patch in the host:
>> >> >> > - /proc/mm...not found
>> >> >> > - PTRACE_FAULTINFO...not found
>> >> >> > - PTRACE_LDT...not found
>> >> >> > UML running in SKAS0 mode
>> >> >> >
>> >> >> > $
>> >> >> > }}}
>> >> >> >
>> >> >> >
>> >> >> > I have also applied the vm non-standard split patch to the
>> >> kernel, but
>> >> >> > still
>> >> >> > it behaves in same way.
>> >> >> >
>> >> >> >
>> >> >> > I also downloaded the precompiled kernels from
>> >> >> > http://uml.nagafix.co.uk/kernels/ but they also gave same
>> behaviour.
>> >> >> >
>> >> >> > I am trying these experiments on Debian x86 machine with kernel
>> >> 2.6.18
>> >> >> >
>> >> >> > The filesystem used by me is from
>> >> >> > http://uml.nagafix.co.uk/FedoraCore5/FedoraCore5-x86-root_fs.bz2
>> >> >> >
>> >> >> > Can I know what wrong steps I am doing ? Do I need to change the
>> >> >> > configuration file ?
>> >> >> > or I need to have special file system to run SELinux on UML ?
>> >> >> >
>> >> >> >
>> >> >> > Thank you
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >>
>> >>
>> ------------------------------------------------------------------------
>> >> >> >
>> >> >> >
>> >> >>
>> >>
>> -------------------------------------------------------------------------
>> >> >> > Using Tomcat but need to do more? Need to support web services,
>> >> >> security?
>> >> >> > Get stuff done quickly with pre-integrated technology to make
>> >> your job
>> >> >> easier.
>> >> >> > Download IBM WebSphere Application Server v.1.0.1 based on Apache
>> >> >> Geronimo
>> >> >> >
>> >> >>
>> >>
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>> >> >> >
>> >> >> >
>> >> >> >
>> >> >>
>> >>
>> ------------------------------------------------------------------------
>> >> >> >
>> >> >> > _______________________________________________
>> >> >> > User-mode-linux-user mailing list
>> >> >> > [email protected]
>> >> >> > https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> -------------------------------------------------------------------------
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>> security?
>> >> Get stuff done quickly with pre-integrated technology to make your job
>> >> easier.
>> >> Download IBM WebSphere Application Server v.1.0.1 based on Apache
>> >> Geronimo
>> >>
>> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>> >> _______________________________________________
>> >> User-mode-linux-user mailing list
>> >> [email protected]
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>> >>
>> >
>>
>>
>
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