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Mon, 28 Jun 2021 14:19:33 +0800 Message-ID: <1147252f497e5529de8215486b184af649ac0a0e.camel@mediatek.com> Subject: Re: [PATCH v2 1/1] kasan: Add memzero init for unaligned size under SLUB debug From: Yee Lee To: Andrey Konovalov CC: , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Andrew Morton , "Matthias Brugger" , "open list:KASAN" , "open list:MEMORY MANAGEMENT" , open list , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" Date: Mon, 28 Jun 2021 14:19:33 +0800 In-Reply-To: References: <20210624112624.31215-1-yee.lee@mediatek.com> <20210624112624.31215-2-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 T24gRnJpLCAyMDIxLTA2LTI1IGF0IDE3OjAzICswMzAwLCBBbmRyZXkgS29ub3ZhbG92IHdyb3Rl Og0KPiBPbiBUaHUsIEp1biAyNCwgMjAyMSBhdCAyOjI2IFBNIDx5ZWUubGVlQG1lZGlhdGVrLmNv bT4gd3JvdGU6DQo+ID4gDQo+ID4gRnJvbTogWWVlIExlZSA8eWVlLmxlZUBtZWRpYXRlay5jb20+ DQo+ID4gDQo+ID4gSXNzdWU6IHdoZW4gU0xVQiBkZWJ1ZyBpcyBvbiwgaHd0YWcga2FzYW5fdW5w b2lzb24oKSB3b3VsZA0KPiA+IG92ZXJ3cml0ZQ0KPiA+IHRoZSByZWR6b25lIG9mIG9iamVjdCB3 aXRoIHVuYWxpZ25lZCBzaXplLg0KPiA+IA0KPiA+IEFuIGFkZGl0aW9uYWwgbWVtemVyb19leHBs aWNpdCgpIHBhdGggaXMgYWRkZWQgdG8gcmVwbGFjaW5nIGluaXQgYnkNCj4gPiBod3RhZyBpbnN0 cnVjdGlvbiBmb3IgdGhvc2UgdW5hbGlnbmVkIHNpemUgYXQgU0xVQiBkZWJ1ZyBtb2RlLg0KPiA+ IA0KPiA+IFNpZ25lZC1vZmYtYnk6IFllZSBMZWUgPHllZS5sZWVAbWVkaWF0ZWsuY29tPg0KPiA+ IC0tLQ0KPiA+ICBtbS9rYXNhbi9rYXNhbi5oIHwgNiArKysrKysNCj4gPiAgMSBmaWxlIGNoYW5n ZWQsIDYgaW5zZXJ0aW9ucygrKQ0KPiA+IA0KPiA+IGRpZmYgLS1naXQgYS9tbS9rYXNhbi9rYXNh bi5oIGIvbW0va2FzYW4va2FzYW4uaA0KPiA+IGluZGV4IDhmNDUwYmMyODA0NS4uZDEwNTRmMzU4 MzhmIDEwMDY0NA0KPiA+IC0tLSBhL21tL2thc2FuL2thc2FuLmgNCj4gPiArKysgYi9tbS9rYXNh bi9rYXNhbi5oDQo+ID4gQEAgLTM4Nyw2ICszODcsMTIgQEAgc3RhdGljIGlubGluZSB2b2lkIGth c2FuX3VucG9pc29uKGNvbnN0IHZvaWQNCj4gPiAqYWRkciwgc2l6ZV90IHNpemUsIGJvb2wgaW5p dCkNCj4gPiANCj4gPiAgICAgICAgIGlmIChXQVJOX09OKCh1bnNpZ25lZCBsb25nKWFkZHIgJiBL QVNBTl9HUkFOVUxFX01BU0spKQ0KPiA+ICAgICAgICAgICAgICAgICByZXR1cm47DQo+ID4gKyNp ZiBJU19FTkFCTEVEKENPTkZJR19TTFVCX0RFQlVHKQ0KPiANCj4gSXMgdGhpcyBhbiBpc3N1ZSBv bmx5IHdpdGggU0xVQj8gU0xBQiBhbHNvIHVzZXMgcmVkem9uZXMuDQpBcyBJIGtub3duLCBody10 YWcga2FzYW4gb25seSB3b3JrcyB3aXRoIFNMVUIuDQoNCj4gDQo+ID4gKyAgICAgICBpZiAoaW5p dCAmJiAoKHVuc2lnbmVkIGxvbmcpc2l6ZSAmIEtBU0FOX0dSQU5VTEVfTUFTSykpIHsNCj4gDQo+ IFRoaXMgbmVlZHMgYSBjb21tZW50IGFsb25nIHRoZSBsaW5lcyBvZjoNCj4gDQo+IC8qIEV4cGxp Y2l0bHkgaW5pdGlhbGl6ZSB0aGUgbWVtb3J5IHdpdGggdGhlIHByZWNpc2Ugb2JqZWN0IHNpemUg dG8NCj4gYXZvaWQgb3ZlcndyaXRpbmcgdGhlIFNMQUIgcmVkem9uZS4gVGhpcyBkaXNhYmxlcyBp bml0aWFsaXphdGlvbiBpbg0KPiB0aGUgYXJjaCBjb2RlIGFuZCBtYXkgdGh1cyBsZWFkIHRvIHBl cmZvcm1hbmNlIHBlbmFsdHkuIFRoZSBwZW5hbHR5DQo+IGlzDQo+IGFjY2VwdGVkIHNpbmNlIFNM QUIgcmVkem9uZXMgYXJlbid0IGVuYWJsZWQgaW4gcHJvZHVjdGlvbiBidWlsZHMuICovDQpTdXJl LCB3aWxsIHdvcmsgb24gdGhpcy4NCj4gDQo+ID4gKyAgICAgICAgICAgICAgIGluaXQgPSBmYWxz ZTsNCj4gPiArICAgICAgICAgICAgICAgbWVtemVyb19leHBsaWNpdCgodm9pZCAqKWFkZHIsIHNp emUpOw0KPiA+ICsgICAgICAgfQ0KPiA+ICsjZW5kaWYNCj4gPiAgICAgICAgIHNpemUgPSByb3Vu ZF91cChzaXplLCBLQVNBTl9HUkFOVUxFX1NJWkUpOw0KPiA+IA0KPiA+ICAgICAgICAgaHdfc2V0 X21lbV90YWdfcmFuZ2UoKHZvaWQgKilhZGRyLCBzaXplLCB0YWcsIGluaXQpOw0KPiA+IC0tDQo+ ID4gMi4xOC4wDQo+ID4gDQo=