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Mon, 5 Jul 2021 21:53:47 +0800 Message-ID: Subject: Re: [PATCH v6 2/2] kasan: Add memzero int for unaligned size at DEBUG From: Yee Lee To: Andrey Konovalov , Marco Elver , Andrew Morton CC: LKML , , Kuan-Ying Lee , , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrew Morton , Matthias Brugger , "open list:KASAN" , "open list:MEMORY MANAGEMENT" , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" Date: Mon, 5 Jul 2021 21:53:47 +0800 In-Reply-To: References: <20210705103229.8505-1-yee.lee@mediatek.com> <20210705103229.8505-3-yee.lee@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org VGhhbmsgeW91LCBNYWNyby4gSSB0aG91Z2h0IG1lbWJlcnMgaW4gInN1Z2dlc3RlZC1ieSIgd291 bGQgYmUgcHV0IGluDQp0aGUgbGlzdCBhcyB3ZWxsLi4uIEFuZCB0aGFuayB5b3UgZ3V5cyBmb3Ig dGhlIHJldmlldyB0aGVzZSBkYXlzLiANCg0KDQpAQW5kcmV3IE1vdG9tDQpIaSBBbmRyZXcsIA0K DQpDb3VsZCB5b3UgaGVscCB0byBwdXNoIHRoZSBwYXRjaGVzPyBXZSBhcmUgZGVhbGluZyB3aXRo IHRoZSBpc3N1ZSBhbmQgDQp3b3VsZCBiYWNrcG9ydCB0byBBbmRyb2lkIHBvcmplY3QgcmlnaHQg YWZ0ZXIgdGhlIGFjdGlvbi4NCkFwcHJlY2lhdGVkIQ0KDQoNCkJSLA0KWWVlIA0KDQoNCk9uIE1v biwgMjAyMS0wNy0wNSBhdCAxMzoyMyArMDIwMCwgQW5kcmV5IEtvbm92YWxvdiB3cm90ZToNCj4g T24gTW9uLCBKdWwgNSwgMjAyMSBhdCAxOjE4IFBNIE1hcmNvIEVsdmVyIDxlbHZlckBnb29nbGUu Y29tPiB3cm90ZToNCj4gPiANCj4gPiBPbiBNb24sIDUgSnVsIDIwMjEgYXQgMTM6MTIsIEFuZHJl eSBLb25vdmFsb3YgPGFuZHJleWtudmxAZ21haWwuY29tDQo+ID4gPiB3cm90ZToNCj4gPiBbLi4u XQ0KPiA+ID4gPiArICAgICAgIC8qDQo+ID4gPiA+ICsgICAgICAgICogRXhwbGljaXRseSBpbml0 aWFsaXplIHRoZSBtZW1vcnkgd2l0aCB0aGUgcHJlY2lzZQ0KPiA+ID4gPiBvYmplY3Qgc2l6ZSB0 bw0KPiA+ID4gPiArICAgICAgICAqIGF2b2lkIG92ZXJ3cml0aW5nIHRoZSBTTEFCIHJlZHpvbmUu IFRoaXMgZGlzYWJsZXMNCj4gPiA+ID4gaW5pdGlhbGl6YXRpb24gaW4NCj4gPiA+ID4gKyAgICAg ICAgKiB0aGUgYXJjaCBjb2RlIGFuZCBtYXkgdGh1cyBsZWFkIHRvIHBlcmZvcm1hbmNlDQo+ID4g PiA+IHBlbmFsdHkuIFRoZSBwZW5hbHR5DQo+ID4gPiA+ICsgICAgICAgICogaXMgYWNjZXB0ZWQg c2luY2UgU0xBQiByZWR6b25lcyBhcmVuJ3QgZW5hYmxlZCBpbg0KPiA+ID4gPiBwcm9kdWN0aW9u IGJ1aWxkcy4NCj4gPiA+ID4gKyAgICAgICAgKi8NCj4gPiA+ID4gKyAgICAgICBpZiAoX19zbHVi X2RlYnVnX2VuYWJsZWQoKSAmJg0KPiA+ID4gDQo+ID4gPiBXaGF0IGhhcHBlbmVkIHRvIHNsdWJf ZGVidWdfZW5hYmxlZF91bmxpa2VseSgpPyBXYXMgaXQgcmVuYW1lZD8NCj4gPiA+IFdoeT8gSQ0K PiA+ID4gZGlkbid0IHJlY2VpdmUgcGF0Y2ggIzEgb2YgdjYgKG5vciBvZiB2NSkuDQo+ID4gDQo+ ID4gU29tZWJvZHkgaGFkIHRoZSBzYW1lIGlkZWEgd2l0aCB0aGUgaGVscGVyOg0KPiA+IGh0dHBz Oi8vbGttbC5rZXJuZWwub3JnL3IvWU9Lc0M3NWtKZkNad3lTREBlbHZlci5nb29nbGUuY29tDQo+ ID4gYW5kIE1hdHRoZXcgZGlkbid0IGxpa2UgdGhlIF91bmxpa2VseSgpIHByZWZpeC4NCj4gPiAN Cj4gPiBXaGljaCBtZWFudCB3ZSBzaG91bGQganVzdCBtb3ZlIHRoZSBleGlzdGluZyBoZWxwZXIg aW50cm9kdWNlZCBpbg0KPiA+IHRoZQ0KPiA+IG1lcmdlIHdpbmRvdy4NCj4gPiANCj4gPiBQYXRj aCAxLzI6IA0KPiA+IGh0dHBzOi8vbGttbC5rZXJuZWwub3JnL3IvMjAyMTA3MDUxMDMyMjkuODUw NS0yLXllZS5sZWVAbWVkaWF0ZWsuY29tDQo+IA0KPiBHb3QgaXQuIFRoYW5rIHlvdSwgTWFyY28h DQo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 716E8C07E99 for ; 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Mon, 5 Jul 2021 21:53:47 +0800 Message-ID: Subject: Re: [PATCH v6 2/2] kasan: Add memzero int for unaligned size at DEBUG From: Yee Lee To: Andrey Konovalov , Marco Elver , Andrew Morton CC: LKML , , Kuan-Ying Lee , , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrew Morton , Matthias Brugger , "open list:KASAN" , "open list:MEMORY MANAGEMENT" , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" Date: Mon, 5 Jul 2021 21:53:47 +0800 In-Reply-To: References: <20210705103229.8505-1-yee.lee@mediatek.com> <20210705103229.8505-3-yee.lee@mediatek.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210705_065356_314826_FDE6AA85 X-CRM114-Status: GOOD ( 19.97 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Thank you, Macro. I thought members in "suggested-by" would be put in the list as well... And thank you guys for the review these days. @Andrew Motom Hi Andrew, Could you help to push the patches? We are dealing with the issue and would backport to Android porject right after the action. Appreciated! BR, Yee On Mon, 2021-07-05 at 13:23 +0200, Andrey Konovalov wrote: > On Mon, Jul 5, 2021 at 1:18 PM Marco Elver wrote: > > > > On Mon, 5 Jul 2021 at 13:12, Andrey Konovalov > > wrote: > > [...] > > > > + /* > > > > + * Explicitly initialize the memory with the precise > > > > object size to > > > > + * avoid overwriting the SLAB redzone. This disables > > > > initialization in > > > > + * the arch code and may thus lead to performance > > > > penalty. The penalty > > > > + * is accepted since SLAB redzones aren't enabled in > > > > production builds. > > > > + */ > > > > + if (__slub_debug_enabled() && > > > > > > What happened to slub_debug_enabled_unlikely()? Was it renamed? > > > Why? I > > > didn't receive patch #1 of v6 (nor of v5). > > > > Somebody had the same idea with the helper: > > https://lkml.kernel.org/r/YOKsC75kJfCZwySD@elver.google.com > > and Matthew didn't like the _unlikely() prefix. > > > > Which meant we should just move the existing helper introduced in > > the > > merge window. > > > > Patch 1/2: > > https://lkml.kernel.org/r/20210705103229.8505-2-yee.lee@mediatek.com > > Got it. Thank you, Marco! _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7711EC07E99 for ; Mon, 5 Jul 2021 13:56:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 40A6E6145D for ; 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Mon, 05 Jul 2021 06:53:50 -0700 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 5 Jul 2021 06:53:48 -0700 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 5 Jul 2021 21:53:47 +0800 Received: from mtksdccf07 (172.21.84.99) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 5 Jul 2021 21:53:47 +0800 Message-ID: Subject: Re: [PATCH v6 2/2] kasan: Add memzero int for unaligned size at DEBUG From: Yee Lee To: Andrey Konovalov , Marco Elver , Andrew Morton CC: LKML , , Kuan-Ying Lee , , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrew Morton , Matthias Brugger , "open list:KASAN" , "open list:MEMORY MANAGEMENT" , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" Date: Mon, 5 Jul 2021 21:53:47 +0800 In-Reply-To: References: <20210705103229.8505-1-yee.lee@mediatek.com> <20210705103229.8505-3-yee.lee@mediatek.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210705_065356_314826_FDE6AA85 X-CRM114-Status: GOOD ( 19.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Thank you, Macro. I thought members in "suggested-by" would be put in the list as well... And thank you guys for the review these days. @Andrew Motom Hi Andrew, Could you help to push the patches? We are dealing with the issue and would backport to Android porject right after the action. Appreciated! BR, Yee On Mon, 2021-07-05 at 13:23 +0200, Andrey Konovalov wrote: > On Mon, Jul 5, 2021 at 1:18 PM Marco Elver wrote: > > > > On Mon, 5 Jul 2021 at 13:12, Andrey Konovalov > > wrote: > > [...] > > > > + /* > > > > + * Explicitly initialize the memory with the precise > > > > object size to > > > > + * avoid overwriting the SLAB redzone. This disables > > > > initialization in > > > > + * the arch code and may thus lead to performance > > > > penalty. The penalty > > > > + * is accepted since SLAB redzones aren't enabled in > > > > production builds. > > > > + */ > > > > + if (__slub_debug_enabled() && > > > > > > What happened to slub_debug_enabled_unlikely()? Was it renamed? > > > Why? I > > > didn't receive patch #1 of v6 (nor of v5). > > > > Somebody had the same idea with the helper: > > https://lkml.kernel.org/r/YOKsC75kJfCZwySD@elver.google.com > > and Matthew didn't like the _unlikely() prefix. > > > > Which meant we should just move the existing helper introduced in > > the > > merge window. > > > > Patch 1/2: > > https://lkml.kernel.org/r/20210705103229.8505-2-yee.lee@mediatek.com > > Got it. Thank you, Marco! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel