Re: [PATCH 0/9] tools subsystem refcounter conversions

[Arnaldo Carvalho de Melo]

Em Wed, Feb 22, 2017 at 08:23:29PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Feb 21, 2017 at 12:39:35PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Feb 21, 2017 at 05:34:54PM +0200, Elena Reshetova escreveu:
> > > Now when new refcount_t type and API are finally merged
> > > (see include/linux/refcount.h), the following
> > > patches convert various refcounters in the tools susystem from atomic_t
> > > to refcount_t. By doing this we prevent intentional or accidental
> > > underflows or overflows that can led to use-after-free vulnerabilities.
> > 
> > Thanks for working on this! I was almost going to jump on doing this
> > myself!
> > 
> > I'll try and get this merged ASAP.
> 
> So, please take a look at my tmp.perf/refcount branch at:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
> 
> There are multiple fixes in it to get it to build and test it, so far,
> with:
> 
>   perf top -F 15000 -d 0
> 
> while doing kernel builds and tight usleep 1 loops to create lots of
> short lived threads with its map_groups, maps, dsos, etc.
> 
> Now running some build tests in some 36 containers with assorted distros
> and cross compilers.

Tomorrow I'll inject some refcount errors to test this all.

- Arnaldo