[libvirt] [PATCH] security: fix deadlock with prefork

[Eric Blake]

On 07/19/2013 09:11 AM, Daniel P. Berrange wrote:
> On Fri, Jul 19, 2013 at 09:09:40AM -0600, Eric Blake wrote:
>> Attempts to start a domain with both SELinux and DAC security
>> modules loaded will deadlock; latent problem introduced in commit
>> fdb3bde and exposed in commit 29fe5d7.  Basically, when recursing
>> into the security manager for other driver's prefork, we have to
>> undo the asymmetric lock taken at the manager level.
>>
>> Reported by Jiri Denemark, with diagnosis help from Dan Berrange.
>>
>> * src/security/security_stack.c (virSecurityStackPreFork): Undo
>> extra lock grabbed during recursion.

> 
> ACK

Thanks, and sorry for the breakage (serves me right for not testing the
stack driver closely enough).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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