On Fri, Feb 3, 2017 at 5:25 AM, Peter Zijlstra <[email protected]> wrote: > Provide refcount_t, an atomic_t like primitive built just for > refcounting. > > It provides saturation semantics such that overflow becomes impossible > and thereby 'spurious' use-after-free is avoided. > > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > --- > include/linux/refcount.h | 294 > +++++++++++++++++++++++++++++++++++++++++++++++ > lib/Kconfig.debug | 13 ++ > 2 files changed, 307 insertions(+) > > --- /dev/null > +++ b/include/linux/refcount.h > @@ -0,0 +1,294 @@ > [...] > +#if CONFIG_DEBUG_REFCOUNT
Oh, and I just hit this too, it should be "#ifdef" ... I didn't notice until after I sent my improvement series. Whoops. :P Yay Friday. -Kees -- Kees Cook Pixel Security
