From: Anisse Astier <anisse@astier.eu>
To: PaX Team <pageexec@freemail.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
David Rientjes <rientjes@google.com>,
Alan Cox <gnomes@lxorguk.ukuu.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Brad Spengler <spender@grsecurity.net>,
Kees Cook <keescook@chromium.org>,
Andi Kleen <andi@firstfloor.org>,
linux-mm@kvack.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 2/4] mm/page_alloc.c: add config option to sanitize freed pages
Date: Tue, 5 May 2015 14:42:11 +0200 [thread overview]
Message-ID: <CALUN=qJHsagU66CH0CakdmKae8eSnmb9jtqrHfNo_3f4ECSMMg@mail.gmail.com> (raw)
In-Reply-To: <5547E996.30078.8008582@pageexec.freemail.hu>
On Mon, May 4, 2015 at 11:50 PM, PaX Team <pageexec@freemail.hu> wrote:
> On 4 May 2015 at 23:16, Anisse Astier wrote:
>
>> @@ -960,9 +966,15 @@ static int prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags,
>> kernel_map_pages(page, 1 << order, 1);
>> kasan_alloc_pages(page, order);
>>
>> +#ifndef CONFIG_SANITIZE_FREED_PAGES
>> + /* SANITIZE_FREED_PAGES relies implicitly on the fact that pages are
>> + * cleared before use, so we don't need gfp zero in the default case
>> + * because all pages go through the free_pages_prepare code path when
>> + * switching from bootmem to the default allocator */
>> if (gfp_flags & __GFP_ZERO)
>> for (i = 0; i < (1 << order); i++)
>> clear_highpage(page + i);
>> +#endif
>
> this hunk should not be applied before the hibernation fix otherwise
> bisect will break.
>
It will be re-ordered in v3, thanks.
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next prev parent reply other threads:[~2015-05-05 12:42 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 21:16 [PATCH v2 0/4] Sanitizing " Anisse Astier
2015-05-04 21:16 ` [PATCH v2 1/4] mm/page_alloc.c: cleanup obsolete KM_USER* Anisse Astier
2015-05-04 21:16 ` [PATCH v2 2/4] mm/page_alloc.c: add config option to sanitize freed pages Anisse Astier
2015-05-04 21:50 ` PaX Team
2015-05-05 12:42 ` Anisse Astier [this message]
2015-05-04 21:16 ` [PATCH v2 3/4] PM / Hibernate: fix SANITIZE_FREED_PAGES Anisse Astier
2015-05-04 21:50 ` PaX Team
2015-05-04 22:29 ` Rafael J. Wysocki
2015-05-05 12:41 ` Anisse Astier
2015-05-04 21:16 ` [PATCH v2 4/4] mm: Add debug code for SANITIZE_FREED_PAGES Anisse Astier
2015-05-04 21:50 ` PaX Team
2015-05-05 12:43 ` Anisse Astier
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