marionnet

kernel crash

Bug #1165066 reported by em
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
marionnet
Fix Committed
Undecided
Unassigned

Bug Description

the VM kernel crash when a user execute the following command :
/sbin/ip link show dev eth0

The kernel used is 3.0.8 with the marionnet patch.

An odd behaviour : If the VM kernel is executed under root (directly the uml kernel, without marionnet) it works ; if the VM kernel is executed under another user, it crash.

This command "/sbin/ip link show dev eth0" is used by the ifup script when there it try to setup a vlan interface.
For example if /etc/network/interfaces is :

iface eth0 inet static
address 10.10.10.1
netmask 255.255.255.0

iface eth0.100 inet static
address 10.10.20.1
netmask 255.255.255.0

when the command "ifup eth0.100" is executed the kernel crash.

Related branches

lp://qastaging/marionnet
Revision history for this message
Luca Saiu (saiu) wrote : Re: [Bug 1165066] [NEW] kernel crash

Hello. Thanks a lot for your bug report.

> the VM kernel crash when a user execute the following command :
> /sbin/ip link show dev eth0
>
> The kernel used is 3.0.8 with the marionnet patch.

Could you please confirm that an unpatched kernel (same version, without
ghostification support) doesn't crash in the same case?

> An odd behaviour : If the VM kernel is executed under root (directly the
> uml kernel, without marionnet) it works ; if the VM kernel is executed
> under another user, it crash.

Interesting, indeed. Can you see what happens with gdb? Otherwise,
Jean-Vincent: can you reproduce it? (We might need to compile the kernel
with debugging symbols, using the -g option.) If so, I can try
debugging it myself.

Thanks,

--
Luca Saiu
Home page: http://ageinghacker.net
GNU epsilon: http://www.gnu.org/software/epsilon
Marionnet: http://marionnet.org

Revision history for this message
em (emmanuel-motchane) wrote : Re: [Marionnet-dev] [Bug 1165066] [NEW] kernel crash

> > Could you please confirm that an unpatched kernel (same version, without
> > gho> Could you please confirm that an unpatched kernel (same version,
without
> ghostification support) doesn't crash in the same case?

Yes, I just test it with a 3.0.8 kernel without the ghostification support
patch, and it doesn't crash.

Emmanuel Motchane

Revision history for this message
Luca Saiu (saiu) wrote :

On 2013-04-06 at 12:21, em wrote:

>> > Could you please confirm that an unpatched kernel (same version, without
>> > gho> Could you please confirm that an unpatched kernel (same version,
> without
>> ghostification support) doesn't crash in the same case?
>
> Yes, I just test it with a 3.0.8 kernel without the ghostification support
> patch, and it doesn't crash.

Thanks.

--
Luca Saiu
Home page: http://ageinghacker.net
GNU epsilon: http://www.gnu.org/software/epsilon
Marionnet: http://marionnet.org

Revision history for this message
Luca Saiu (saiu) wrote :

We finally managed to look at it yesterday. It's now fixed.

Changed in marionnet:
status: New → Fix Committed
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