[Debian] Re: Bug#513310: vzctl fails to set capabilities, and subsequently fails to start any VE

[Ola Lundqvist]

Hi Kir

I will backport this fix. I thought I already did that. Thanks!

// Ola

Quoting Kir Kolyshkin <kir at openvz.org>:

> This is caused by newer kernel headers (in this case on a build system
> that was used to build this vzctl package), and is fixed in
> vzctl-3.0.23. See the following git commit:
>
> http://git.openvz.org/?p=vzctl;a=commit;h=0d6bfad92c7cb6a193801ce8dac3a0dc64396ca8
>
> So the solution is either to upgrade to vzctl-3.0.23 or to backport
> this simple fix.
>
> Ola Lundqvist wrote:
>> Hi Daniel
>>
>> This is interesting as it works very well on my systems. On other hand that
>> system is a 686 based one.
>>
>> You write that you have not significantly changed your system, but at the
>> same time you write that you are not sure that it has ever worked with the
>> 2.6.26 kernel.
>>
>> Can you please elaborate when it worked last time, and what you have done
>> since then?
>>
>> Which version of the linux kernel are you running for example?
>> If you switch to the 2.6.24 kernel do it work then?
>>
>> Best regards,
>>
>> // Ola
>>
>> On Wed, Jan 28, 2009 at 01:34:52PM +1100, Daniel Pittman wrote:
>>
>>> Package: vzctl
>>> Version: 3.0.22-14
>>> Severity: grave
>>> Justification: renders package unusable
>>>
>>> When trying to start a VE I get the following output:
>>>
>>> ] sudo vzctl start sd-dev
>>> Starting VE ...
>>> VE is mounted
>>> Unable to set capability: Operation not permitted
>>> Unable to set capability
>>> VE start failed
>>> VE is unmounted
>>>
>>> When I strace the system I see the following call to set capabilities:
>>>
>>> [pid 14391] capget(0x20071026, 0, NULL) = -1 EFAULT (Bad address)
>>> [pid 14390] exit_group(0)               = ?
>>> Process 14390 detached
>>> [pid 14391] capset(0x20071026, 0,   
>>> {CAP_CHOWN|CAP_DAC_OVERRIDE|CAP_DAC_READ_SEARCH|CAP_FOWNER|CAP_FSETID|CAP_KILL|CAP_SETGID|CAP_SETUID|CAP_LINUX_IMMUTABLE|CAP_NET_BIND_SERVICE|CAP_NET_BROADCAST|CAP_NET_RAW|CAP_IPC_LOCK|CAP_IPC_OWNER|CAP_SYS_CHROOT|CAP_SYS_PTRACE|CAP_SYS_BOOT|CAP_SYS_NICE|CAP_SYS_RESOURCE|CAP_SYS_TTY_CONFIG|0x78000000, CAP_CHOWN|CAP_DAC_OVERRIDE|CAP_DAC_READ_SEARCH|CAP_FOWNER|CAP_FSETID|CAP_KILL|CAP_SETGID|CAP_SETUID|CAP_LINUX_IMMUTABLE|CAP_NET_BIND_SERVICE|CAP_NET_BROADCAST|CAP_NET_RAW|CAP_IPC_LOCK|CAP_IPC_OWNER|CAP_SYS_CHROOT|CAP_SYS_PTRACE|CAP_SYS_BOOT|CAP_SYS_NICE|CAP_SYS_RESOURCE|CAP_SYS_TTY_CONFIG|0x78000000, CAP_CHOWN|CAP_DAC_OVERRIDE|CAP_DAC_READ_SEARCH|CAP_FOWNER|CAP_FSETID|CAP_KILL|CAP_SETGID|CAP_SETUID|CAP_LINUX_IMMUTABLE|CAP_NET_BIND_SERVICE|CAP_NET_BROADCAST|CAP_NET_RAW|CAP_IPC_LOCK|CAP_IPC_OWNER|CAP_SYS_CHROOT|CAP_SYS_PTRACE|CAP_SYS_BOOT|CAP_SYS_NICE|CAP_SYS_RESOURCE|CAP_SYS_TTY_CONFIG|0x78000000}) = -1 EPERM (Operation not   
>>> permitted)
>>>
>>>
>>> This fails to start the VE, reporting that the capset operation failed.
>>> None of my configuration has been modified significantly, and certainly not
>>> to change the capability set of the VE or anything like that.
>>>
>>> This same configuration worked on a 2.6.24 VZ kernel, but I am not  
>>>  sure it ever
>>> worked on the 2.6.26 kernel.
>>>
>>> -- System Information:
>>> Debian Release: 5.0
>>>  APT prefers unstable
>>>  APT policy: (500, 'unstable'), (1, 'experimental')
>>> Architecture: amd64 (x86_64)
>>>
>>> Kernel: Linux 2.6.26-1-openvz-amd64 (SMP w/2 CPU cores)
>>> Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
>>> Shell: /bin/sh linked to /bin/dash
>>>
>>> Versions of packages vzctl depends on:
>>> ii  iproute                       20080725-2 networking and   
>>> traffic control too
>>> ii  libc6                         2.7-18     GNU C Library: Shared  
>>>  libraries
>>> ii  vzquota                       3.0.11-1   server virtualization  
>>>  solution - q
>>>
>>> Versions of packages vzctl recommends:
>>> ii  rsync                         3.0.5-1    fast remote file copy  
>>>  program (lik
>>>
>>> Versions of packages vzctl suggests:
>>> pn  linux-patch-openvz            <none>     (no description available)
>>>
>>> -- no debconf information
>>>
>>>
>>>
>>>
>>
>>



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