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Tue, 10 Sep 2019 09:07:49 +0800 Message-ID: <1568077669.24886.3.camel@mtksdccf07> Subject: Re: [PATCH v2 1/2] mm/page_ext: support to record the last stack of page From: Walter Wu To: David Hildenbrand Date: Tue, 10 Sep 2019 09:07:49 +0800 In-Reply-To: <36b5a8e0-2783-4c0e-4fc7-78ea652ba475@redhat.com> References: <20190909085339.25350-1-walter-zh.wu@mediatek.com> <36b5a8e0-2783-4c0e-4fc7-78ea652ba475@redhat.com> X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190909_180759_012249_7EE3EC16 X-CRM114-Status: GOOD ( 16.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Qian Cai , wsd_upstream@mediatek.com, Arnd Bergmann , linux-mm@kvack.org, Andrey Konovalov , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Michal Hocko , Martin Schwidefsky , Alexander Potapenko , linux-arm-kernel@lists.infradead.org, Matthias Brugger , Andrey Ryabinin , Andrew Morton , Will Deacon , Thomas Gleixner , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 2019-09-09 at 12:57 +0200, David Hildenbrand wrote: > On 09.09.19 10:53, Walter Wu wrote: > > KASAN will record last stack of page in order to help programmer > > to see memory corruption caused by page. > > > > What is difference between page_owner and our patch? > > page_owner records alloc stack of page, but our patch is to record > > last stack(it may be alloc or free stack of page). > > > > Signed-off-by: Walter Wu > > --- > > mm/page_ext.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/mm/page_ext.c b/mm/page_ext.c > > index 5f5769c7db3b..7ca33dcd9ffa 100644 > > --- a/mm/page_ext.c > > +++ b/mm/page_ext.c > > @@ -65,6 +65,9 @@ static struct page_ext_operations *page_ext_ops[] = { > > #if defined(CONFIG_IDLE_PAGE_TRACKING) && !defined(CONFIG_64BIT) > > &page_idle_ops, > > #endif > > +#ifdef CONFIG_KASAN > > + &page_stack_ops, > > +#endif > > }; > > > > static unsigned long total_usage; > > > > Are you sure this patch compiles? > This is patchsets, it need another patch2. We have verified it by running KASAN UT on Qemu. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel