From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: pageexec@freemail.hu
Cc: Anisse Astier <anisse@astier.eu>,
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@vger.kernel.org,
Pavel Machek <pavel@ucw.cz>,
Linux PM list <linux-pm@vger.kernel.org>
Subject: Re: [PATCH v2 3/4] PM / Hibernate: fix SANITIZE_FREED_PAGES
Date: Tue, 05 May 2015 00:29:10 +0200 [thread overview]
Message-ID: <28072506.ijDyy3q5rs@vostro.rjw.lan> (raw)
In-Reply-To: <5547E995.9980.80084D6@pageexec.freemail.hu>
On Monday, May 04, 2015 11:50:13 PM PaX Team wrote:
> On 4 May 2015 at 23:16, Anisse Astier wrote:
>
> > SANITIZE_FREED_PAGES feature relies on having all pages going through
> > the free_pages_prepare path in order to be cleared before being used. In
> > the hibernate use case, pages will automagically appear in the system
> > without being cleared.
>
> is this based on debugging/code reading/discussions with hibernation folks
> (i see none of them on CC, added them now) or is it just a brute force attempt
> to fix the symptoms? if the former, it'd be nice to share some more details
> and have Acks from the code owners.
I haven't seen it, for one, and I'm wondering why the "clearing" cannot be done
at the swsusp_free() time?
In any case, please CC hibernation-related patches and discussions thereof to
linux-pm@vger.kernel.org.
Thanks!
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next prev parent reply other threads:[~2015-05-04 22:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-04 21:16 [PATCH v2 0/4] Sanitizing freed pages 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
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 [this message]
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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