On Wed, 2019-09-04 at 15:44 +0200, Andrey Konovalov wrote: > On Wed, Sep 4, 2019 at 8:51 AM Walter Wu <walter-zh.wu@xxxxxxxxxxxx> wrote: > > +config KASAN_DUMP_PAGE > > + bool "Dump the page last stack information" > > + depends on KASAN && PAGE_OWNER > > + help > > + By default, KASAN doesn't record alloc/free stack for page allocator. > > + It is difficult to fix up page use-after-free issue. > > + This feature depends on page owner to record the last stack of page. > > + It is very helpful for solving the page use-after-free or out-of-bound. > > I'm not sure if we need a separate config for this. Is there any > reason to not have this enabled by default? PAGE_OWNER need some memory usage, it is not allowed to enable by default in low RAM device. so I create new feature option and the person who wants to use it to enable it. Thanks. Walter
