On Tue, Sep 10, 2019 at 09:07:49AM +0800, Walter Wu wrote:
> On Mon, 2019-09-09 at 12:57 +0200, David Hildenbrand wrote:
> > On 09.09.19 10:53, Walter Wu wrote:
> > > KASAN will record last stack of page in order to help programmer
> > > to see memory corruption caused by page.
> > >
> > > What is difference between page_owner and our patch?
> > > page_owner records alloc stack of page, but our patch is to record
> > > last stack(it may be alloc or free stack of page).
> > >
> > > Signed-off-by: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
> > > ---
> > > mm/page_ext.c | 3 +++
> > > 1 file changed, 3 insertions(+)
> > >
> > > diff --git a/mm/page_ext.c b/mm/page_ext.c
> > > index 5f5769c7db3b..7ca33dcd9ffa 100644
> > > --- a/mm/page_ext.c
> > > +++ b/mm/page_ext.c
> > > @@ -65,6 +65,9 @@ static struct page_ext_operations *page_ext_ops[] = {
> > > #if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT)
> > > &page_idle_ops,
> > > #endif
> > > +#ifdef CONFIG_KASAN
> > > + &page_stack_ops,
> > > +#endif
> > > };
> > >
> > > static unsigned long total_usage;
> > >
> >
> > Are you sure this patch compiles?
> >
> This is patchsets, it need another patch2.
> We have verified it by running KASAN UT on Qemu.
Any patchset must be bisectable: do not break anything in the middle of
patchset.
--
Kirill A. Shutemov
