On Tue, 2019-09-10 at 13:53 +0200, Vlastimil Babka wrote: > On 9/10/19 12:50 PM, Andrey Ryabinin wrote: > > > > > > For slab objects we memorize both alloc and free stacks. You'll never know in advance what information will be usefull > > to fix an issue, so it usually better to provide more information. I don't think we should do anything different for pages. > > Exactly, thanks. > > > Given that we already have the page_owner responsible for providing alloc/free stacks for pages, all that we should in KASAN do is to > > enable the feature by default. Free stack saving should be decoupled from debug_pagealloc into separate option so that it can be enabled > > by KASAN and/or debug_pagealloc. > > Right. Walter, can you do it that way, or should I? > > Thanks, > Vlastimil I will send new patch v3.
