Messages in this thread | | | Subject | Re: [PATCH] page_poison: plays nicely with KASAN | From | Andrey Ryabinin <> | Date | Fri, 11 Jan 2019 21:45:25 +0300 |
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On 1/8/19 1:36 AM, Qian Cai wrote:
> > diff --git a/mm/page_poison.c b/mm/page_poison.c > index f0c15e9017c0..e546b70e592a 100644 > --- a/mm/page_poison.c > +++ b/mm/page_poison.c > @@ -6,6 +6,7 @@ > #include <linux/page_ext.h> > #include <linux/poison.h> > #include <linux/ratelimit.h> > +#include <linux/kasan.h> > > static bool want_page_poisoning __read_mostly; > > @@ -40,6 +41,7 @@ static void poison_page(struct page *page) > { > void *addr = kmap_atomic(page); > > + kasan_unpoison_shadow(addr, PAGE_SIZE); > memset(addr, PAGE_POISON, PAGE_SIZE);
kasan_disable/enable_current() should be slightly more efficient for this case.
> kunmap_atomic(addr); > } >
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