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Sun, 6 Dec 2020 00:17:12 +0800 Message-ID: <1607185035.22062.42.camel@mtksdccf07> Subject: Re: [PATCH] kasan: fix slab double free when cpu-hotplug From: Kuan-Ying Lee To: Andrew Morton CC: "qiang.zhang@windriver.com" , "sfr@canb.auug.org.au" , "aryabinin@virtuozzo.com" , "dvyukov@google.com" , "andreyknvl@google.com" , "qcai@redhat.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Date: Sun, 6 Dec 2020 00:17:15 +0800 In-Reply-To: <20201204172521.ed9f77164ff9f9fc91f35ee0@linux-foundation.org> References: <20201204102206.20237-1-qiang.zhang@windriver.com> <1607083295.22062.15.camel@mtksdccf07> <20201204172521.ed9f77164ff9f9fc91f35ee0@linux-foundation.org> 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org T24gRnJpLCAyMDIwLTEyLTA0IGF0IDE3OjI1IC0wODAwLCBBbmRyZXcgTW9ydG9uIHdyb3RlOg0K PiBPbiBGcmksIDQgRGVjIDIwMjAgMjA6MDE6MzUgKzA4MDAgS3Vhbi1ZaW5nIExlZSA8S3Vhbi1Z aW5nLkxlZUBtZWRpYXRlay5jb20+IHdyb3RlOg0KPiANCj4gPiA+IGRpZmYgLS1naXQgYS9tbS9r YXNhbi9xdWFyYW50aW5lLmMgYi9tbS9rYXNhbi9xdWFyYW50aW5lLmMNCj4gPiA+IGluZGV4IGQ5 OGI1MTZmMzcyZi4uNTU3ODMxMjVhNzY3IDEwMDY0NA0KPiA+ID4gLS0tIGEvbW0va2FzYW4vcXVh cmFudGluZS5jDQo+ID4gPiArKysgYi9tbS9rYXNhbi9xdWFyYW50aW5lLmMNCj4gPiA+IEBAIC0x OTQsNyArMTk0LDYgQEAgYm9vbCBxdWFyYW50aW5lX3B1dChzdHJ1Y3Qga21lbV9jYWNoZSAqY2Fj aGUsIHZvaWQgKm9iamVjdCkNCj4gPiA+ICANCj4gPiA+ICAJcSA9IHRoaXNfY3B1X3B0cigmY3B1 X3F1YXJhbnRpbmUpOw0KPiA+ID4gIAlpZiAocS0+b2ZmbGluZSkgew0KPiA+ID4gLQkJcWxpbmtf ZnJlZSgmbWV0YS0+cXVhcmFudGluZV9saW5rLCBjYWNoZSk7DQo+ID4gPiAgCQlsb2NhbF9pcnFf cmVzdG9yZShmbGFncyk7DQo+ID4gPiAgCQlyZXR1cm4gZmFsc2U7DQoNCkhpIEFuZHJldywNCg0K UmV0dXJuIGZhbHNlIHdpbGwgY2F1c2Ugc2xhYiBhbGxvY2F0b3IgdG8gZnJlZSB0aGUgb2JqZWN0 Lg0KVGh1cywgd2UgZG8gbm90IG5lZWQgdG8gcWxpbmtfZnJlZSBoZXJlIHRvIGZyZWUgb2JqZWN0 IHR3aWNlLg0KDQpUaGUgcmV0dXJuIHZhbHVlIGlzIGludHJvZHVjZWQgZnJvbSBBbmRyZXkncyBw YXRjaC4NCiJrYXNhbjogc2FuaXRpemUgb2JqZWN0cyB3aGVuIG1ldGFkYXRhIGRvZXNuJ3QgZml0 Ig0KDQoNCj4gPiA+ICAJfQ0KPiA+IA0KPiA+IEhpIFFpYW5nLA0KPiA+IA0KPiA+IFRoYW5rcyBm b3IgZml4aW5nIHRoaXMuDQo+ID4gRHVlIHRvIHRoYXQgaXNzdWUsIG15IGNvbW1pdCBoYXMgYmVl biByZW1vdmVkIGJ5IFN0ZXBoZW4gZnJvbQ0KPiA+IGxpbnV4LW5leHQuDQo+ID4gDQo+ID4gDQo+ ID4gSGkgU3RlcGhlbiwgQW5kcmV3LA0KPiA+IA0KPiA+IFNob3VsZCBJIGRpcmVjdGx5IHVwbG9h ZCB0aGUgdjQgb3IgU3RlcGhlbiBjYW4gcGljayB0aGUgY29tbWl0IHdoaWNoIA0KPiA+IGhhcyBi ZWVuIHJlbW92ZWQgYmFjayB0byB0aGUgbGludXgtbmV4dC4NCj4gDQo+IEkgdG9vayBjYXJlIG9m IGl0LiAgUmVzdG9yZWQgdGhlIG9yaWdpbmFsIHBhdGNoIGFuZCBhZGRlZCB0aGlzIG9uZSBhcyBh DQo+IC1maXguDQoNClRoYW5rcyBmb3IgdGFraW5nIGNhcmUgb2YgaXQuDQoNCkkgdGhpbmsgdGhl cmUgYXJlIHNvbWUgcHJvYmxlbSBpbiB0aGUgcGF0Y2ggeW91IGp1c3QgcmVzdG9yZWQuDQpJIHNh dyB0aGUgcmVzdG9yZWQgcGF0Y2ggaXMgbm90IGJhc2VkIG9uIEFuZHJleSdzIHBhdGNoIGFuZCBT dGVwaGVuJ3MNCmZpeCBjb25mbGljdCBwYXRjaC4NCg0KQnV0IHRoZSBpc3N1ZSBRaWFuZyBmaXhl ZCBuZWVkIHRvIGJlIGJhc2VkIG9uIHRoZSBBbmRyZXkncyBwYXRjaCBhbmQNClN0ZXBoZW4ncyBm aXggY29uZmxpY3QgcGF0Y2guDQoia2FzYW46IHNhbml0aXplIG9iamVjdHMgd2hlbiBtZXRhZGF0 YSBkb2Vzbid0IGZpdCINCiJrYXNhbi1yZW5hbWUtZ2V0X2FsbG9jLWZyZWVfaW5mby1maXgiDQoN CklmIHRoZSByZXN0b3JlZCBwYXRjaCBpcyBub3QgYmFzZWQgb24gdGhhdCwgaXQgbWF5IGNhdXNl IHNvbWUgcHJvYmxlbXMNCmFuZCBjb25mbGljdHMuDQoNCkkgdGhpbmsgSSBjYW4gcHJlcGFyZSBh IHBhdGNoIHY0IGJhc2VkIG9uIEFuZHJleSdzIHBhdGNoLCBmaXggdGhlDQpjb25mbGljdCBhbmQg aW5jbHVkZSB0aGUgUWlhbmcncyBtb2RpZmljYXRpb24uDQoNClRoYW5rcywNCkt1YW4tWWluZw0K DQoNCg==