From: Andrey Ryabinin <aryabinin@virtuozzo.com>
To: Qian Cai <cai@lca.pw>, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] page_poison: plays nicely with KASAN
Date: Fri, 11 Jan 2019 21:45:25 +0300 [thread overview]
Message-ID: <2e46c139-70d3-dc86-28c9-a9f263651b57@virtuozzo.com> (raw)
In-Reply-To: <20190107223636.80593-1-cai@lca.pw>
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);
> }
>
next prev parent reply other threads:[~2019-01-11 18:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-07 22:36 [PATCH] page_poison: plays nicely with KASAN Qian Cai
2019-01-11 18:45 ` Andrey Ryabinin [this message]
2019-01-14 23:34 ` [PATCH v2] page_poison: play " Qian Cai
2019-01-15 17:25 ` Andrey Ryabinin
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