Re: [PATCH 1/1] kernel/pid_namespace.c: Fixing a lack of cleanup(Probable resources leak).

[Cyrill Gorcunov]

On Tue, Mar 05, 2013 at 02:04:45AM -0300, Raphael S Carvalho wrote:
> >
> > Actually I noticed this problem and I think it is not a BUG.
> > Since the pid_cache is created for all pid namespace which have the same level.
> > Even this pid namespace is failed to create, the pid_cache will not be leaked, Other
> > pid namespace which has the same level will use the pid_cache and no need to
> > allocate it again. In other words, the pid_cache for every level pid namespace will
> > only be created once.
> >
> > I also think this patch add a bug,because there may be other pid namespace's pid_cachep
> > points to the same pid_cache which will be free at the by label out_free_cachep.
> >

Yup, drop this patch.

> 
> Yeah, I found the snippet of code which searches for the pcache with
> the same level.
>  46        list_for_each_entry(pcache, &pid_caches_lh, list)
>  47                if (pcache->nr_ids == nr_ids)
>  48                        goto out;
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