[Pkg-xen-devel] double free or corruption in xl 4.2

[Ian Campbell]

On Sun, 2013-08-18 at 12:54 +0200, Olivier Bonvalet wrote:
> Le samedi 17 août 2013 à 11:37 +0100, Ian Campbell a écrit :
> > On Sat, 2013-08-17 at 09:35 +0200, Olivier Bonvalet wrote:
> > > 
> > > Is it an xl bug, that I should report upstream ? 
> > 
> > Well it's certainly a bug but it is hard to say if it is upstream or if
> > it is caused by (perhaps partially incomplete) backports in the
> > packaging. Before reporting upstream it would ideally be reproduced with
> > either the latest 4.2.x or the development branch.
> > 
> > Do you have symbols for the xl binary? That might make the backtrace
> > more useful.
> > 
> > "xl -vvv create" may also give some information about what was going on.
> > 
> > You could also try running under valgrind and see if that can pinpoint
> > the issue. If it is crashing early enough then maybe regular valrind
> > will work, but if it is happening later (specifically after any
> > hypercalls are made) then you would need the new upstream valgrind
> > support for knowing about Xen -- this is only in svn though.
> > 
> > Ian.
> > 
> > 
> 
> 
> Hi,
> 
> thanks for your answer.
> 
> After more tests, I saw that it's just a "disk full" problem. When the
> disk of the dom0 is full xl crash instead of returning a more explicit
> error message.

Hrm, that's unfortunate. It probably still indicates a bug in an error
handling path somewhere, but I don't expect you to want to try and track
it down.
> 
> So, no big problem here, if the disk is not null, all works fine.

s/null/full/ I think or I've misread the previous paragraph.


Ian.