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Fri, 22 Nov 2019 15:18:30 +0800 Received: from [172.21.84.99] (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 22 Nov 2019 15:18:28 +0800 Message-ID: <1574407116.8338.10.camel@mtksdccf07> Subject: Re: [PATCH v4 1/2] kasan: detect negative size in memory operation function From: Walter Wu To: Andrey Ryabinin CC: Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , , , , , wsd_upstream , , Andrew Morton Date: Fri, 22 Nov 2019 15:18:36 +0800 In-Reply-To: References: <20191112065302.7015-1-walter-zh.wu@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gRnJpLCAyMDE5LTExLTIyIGF0IDAxOjIwICswMzAwLCBBbmRyZXkgUnlhYmluaW4gd3JvdGU6 DQo+IA0KPiBPbiAxMS8xMi8xOSA5OjUzIEFNLCBXYWx0ZXIgV3Ugd3JvdGU6DQo+ID4gS0FTQU4g bWlzc2VkIGRldGVjdGluZyBzaXplIGlzIGEgbmVnYXRpdmUgbnVtYmVyIGluIG1lbXNldCgpLCBt ZW1jcHkoKSwNCj4gPiBhbmQgbWVtbW92ZSgpLCBpdCB3aWxsIGNhdXNlIG91dC1vZi1ib3VuZHMg YnVnLiBTbyBuZWVkcyB0byBiZSBkZXRlY3RlZA0KPiA+IGJ5IEtBU0FOLg0KPiA+IA0KPiA+IElm IHNpemUgaXMgYSBuZWdhdGl2ZSBudW1iZXIsIHRoZW4gaXQgaGFzIGEgcmVhc29uIHRvIGJlIGRl ZmluZWQgYXMNCj4gPiBvdXQtb2YtYm91bmRzIGJ1ZyB0eXBlLg0KPiA+IENhc3RpbmcgbmVnYXRp dmUgbnVtYmVycyB0byBzaXplX3Qgd291bGQgaW5kZWVkIHR1cm4gdXAgYXMNCj4gPiBhIGxhcmdl IHNpemVfdCBhbmQgaXRzIHZhbHVlIHdpbGwgYmUgbGFyZ2VyIHRoYW4gVUxPTkdfTUFYLzIsDQo+ ID4gc28gdGhhdCB0aGlzIGNhbiBxdWFsaWZ5IGFzIG91dC1vZi1ib3VuZHMuDQo+ID4gDQo+ID4g S0FTQU4gcmVwb3J0IGlzIHNob3duIGJlbG93Og0KPiA+IA0KPiA+ICBCVUc6IEtBU0FOOiBvdXQt b2YtYm91bmRzIGluIGttYWxsb2NfbWVtbW92ZV9pbnZhbGlkX3NpemUrMHg3MC8weGEwDQo+ID4g IFJlYWQgb2Ygc2l6ZSAxODQ0Njc0NDA3MzcwOTU1MTYwOCBhdCBhZGRyIGZmZmZmZjgwNjk2NjA5 MDQgYnkgdGFzayBjYXQvNzINCj4gPiANCj4gPiAgQ1BVOiAyIFBJRDogNzIgQ29tbTogY2F0IE5v dCB0YWludGVkIDUuNC4wLXJjMS1uZXh0LTIwMTkxMDA0YWpiLTAwMDAxLWdkYjhhZjJmMzcyYjIt ZGlydHkgIzENCj4gPiAgSGFyZHdhcmUgbmFtZTogbGludXgsZHVtbXktdmlydCAoRFQpDQo+ID4g IENhbGwgdHJhY2U6DQo+ID4gICBkdW1wX2JhY2t0cmFjZSsweDAvMHgyODgNCj4gPiAgIHNob3df c3RhY2srMHgxNC8weDIwDQo+ID4gICBkdW1wX3N0YWNrKzB4MTBjLzB4MTY0DQo+ID4gICBwcmlu dF9hZGRyZXNzX2Rlc2NyaXB0aW9uLmlzcmEuOSsweDY4LzB4Mzc4DQo+ID4gICBfX2thc2FuX3Jl cG9ydCsweDE2NC8weDFhMA0KPiA+ICAga2FzYW5fcmVwb3J0KzB4Yy8weDE4DQo+ID4gICBjaGVj a19tZW1vcnlfcmVnaW9uKzB4MTc0LzB4MWQwDQo+ID4gICBtZW1tb3ZlKzB4MzQvMHg4OA0KPiA+ ICAga21hbGxvY19tZW1tb3ZlX2ludmFsaWRfc2l6ZSsweDcwLzB4YTANCj4gPiANCj4gPiBbMV0g aHR0cHM6Ly9idWd6aWxsYS5rZXJuZWwub3JnL3Nob3dfYnVnLmNnaT9pZD0xOTkzNDENCj4gPiAN Cj4gPiBTaWduZWQtb2ZmLWJ5OiBXYWx0ZXIgV3UgPHdhbHRlci16aC53dUBtZWRpYXRlay5jb20+ DQo+ID4gUmVwb3J0ZWQtYnk6IERtaXRyeSBWeXVrb3YgPGR2eXVrb3ZAZ29vZ2xlLmNvbT4NCj4g PiBTdWdnZXN0ZWQtYnk6IERtaXRyeSBWeXVrb3YgPGR2eXVrb3ZAZ29vZ2xlLmNvbT4NCj4gPiBS ZXZpZXdlZC1ieTogRG1pdHJ5IFZ5dWtvdiA8ZHZ5dWtvdkBnb29nbGUuY29tPg0KPiA+IENjOiBB bmRyZXkgUnlhYmluaW4gPGFyeWFiaW5pbkB2aXJ0dW96em8uY29tPg0KPiA+IENjOiBBbGV4YW5k ZXIgUG90YXBlbmtvIDxnbGlkZXJAZ29vZ2xlLmNvbT4NCj4gPiBSZXBvcnRlZC1ieToga2VybmVs IHRlc3Qgcm9ib3QgPGxrcEBpbnRlbC5jb20+DQo+ID4gLS0tDQo+IA0KPiBSZXZpZXdlZC1ieTog QW5kcmV5IFJ5YWJpbmluIDxhcnlhYmluaW5AdmlydHVvenpvLmNvbT4NCg0KSGkgQW5kcmV5LCBE bWl0cnksDQoNClRoYW5rcyBmb3IgeW91ciByZXZpZXcgYW5kIHN1Z2dlc3Rpb24uDQoNCldhbHRl cg0K