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Thu, 22 Jul 2021 21:01:51 -0700 From: "Luck, Tony" To: Jue Wang CC: Borislav Petkov , "dinghui@sangfor.com.cn" , "huangcun@sangfor.com.cn" , "linux-edac@vger.kernel.org" , "linux-kernel@vger.kernel.org" , =?utf-8?B?SE9SSUdVQ0hJIE5BT1lBKOWggOWPoyDnm7TkuZ8p?= , Oscar Salvador , x86 , "Song, Youquan" Subject: RE: [PATCH 2/3] x86/mce: Avoid infinite loop for copy from user recovery Thread-Topic: [PATCH 2/3] x86/mce: Avoid infinite loop for copy from user recovery Thread-Index: AQHXfwEmVkDftAlLQUekz+CS3pEeK6tPG/EAgAD+lAD//5bsgIAAsOQA//+MXOA= Date: Fri, 23 Jul 2021 04:01:44 +0000 Message-ID: <0e39ef0e1b6d4532a09ad2d6e0b28310@intel.com> References: <20210722151930.GA1453521@agluck-desk2.amr.corp.intel.com> <20210723001436.GA1460637@agluck-desk2.amr.corp.intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-reaction: no-action dlp-version: 11.5.1.3 x-originating-ip: [10.1.200.100] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pj4gSSdtIG5vdCBhd2FyZSBvZiwgbm9yIGV4cGVjdGluZyB0byBmaW5kLCBwbGFjZXMgd2hlcmUg dGhlIGtlcm5lbA0KPj4gdHJpZXMgdG8gYWNjZXNzIHVzZXIgYWRkcmVzcyBBIGFuZCBoaXRzIHBv aXNvbiwgYW5kIHRoZW4gdHJpZXMgdG8NCj4+IGFjY2VzcyB1c2VyIGFkZHJlc3MgQiAod2l0aG91 dCByZXR1cnJuaW5nIHRvIHVzZXIgYmV0d2VlbiBhY2Nlc3MNCj4+IEEgYW5kIGFjY2VzcyBCKS4N Cj5UaGlzIHNlZW1zIGEgcmVhc29uYWJsZWx5IGVhc3kgc2NlbmFyaW8uDQo+DQo+IEEgdXNlciBz cGFjZSBhcHAgYWxsb2NhdGVzIGEgYnVmZmVyIG9mIHh5eiBLQi9NQi9HQi4NCj4NCj4gVW5mb3J0 dW5hdGVseSB0aGUgZGltbXMgYXJlIGJhZCBhbmQgbXVsdGlwbGUgY2FjaGUgbGluZXMgaGF2ZQ0K PiB1bmNvcnJlY3RhYmxlIGVycm9ycyBpbiB0aGVtIG9uIGRpZmZlcmVudCBwYWdlcy4NCj4NCj4g VGhlbiB0aGUgdXNlciBzcGFjZSBhcHAgdHJpZXMgdG8gd3JpdGUgdGhlIGNvbnRlbnQgb2YgdGhl IGJ1ZmZlciBpbnRvIHNvbWUNCj4gZmlsZSB2aWEgd3JpdGUoMikgZnJvbSB0aGUgZW50aXJlIGJ1 ZmZlciBpbiBvbmUgZ28uDQoNCkJlZm9yZSB0aGlzIHBhdGNoIExpbnV4IGdldHMgaW50byBhbiBp bmZpbml0ZSBsb29wIHRha2luZyBtYWNoaW5lDQpjaGVja3Mgb24gdGhlIGZpcnN0IG9mIHRoZSBw b2lzb24gYWRkcmVzc2VzIGluIHRoZSBidWZmZXIuDQoNCldpdGggdGhpcyBwYXRjaCAoYW5kIGFs c28gcGF0Y2ggMy8zIGluIHRoaXMgc2VyaWVzKS4gVGhlcmUgYXJlDQphIGZldyBtYWNoaW5lIGNo ZWNrcyBvbiB0aGUgZmlyc3QgcG9pc29uIGFkZHJlc3MgKEkgdGhpbmsgdGhlIG51bWJlcg0KZGVw ZW5kcyBvbiB0aGUgYWxpZ25tZW50IG9mIHRoZSBwb2lzb24gd2l0aGluIGEgcGFnZSAuLi4gYnV0 IEknbQ0Kbm90IHN1cmUpLiBNeSB0ZXN0IGNvZGUgc2hvd3MgNCBtYWNoaW5lIGNoZWNrcyBhdCB0 aGUgc2FtZQ0KYWRkcmVzcy4gVGhlbiBMaW51eCByZXR1cm5zIGEgc2hvcnQgYnl0ZSBjb3VudCB0 byB0aGUgdXNlcg0Kc2hvd2luZyBob3cgbWFueSBieXRlcyB3ZXJlIGFjdHVhbGx5IHdyaXR0ZW4g dG8gdGhlIGZpbGUuDQoNClRoZSBmYXN0IHRoYXQgdGhlcmUgYXJlIG1hbnkgbW9yZSBwb2lzb24g bGluZXMgaW4gdGhlIGJ1ZmZlcg0KYmV5b25kIHRoZSBwbGFjZSB3aGVyZSB0aGUgd3JpdGUgc3Rv cHBlZCBvbiB0aGUgZmlyc3Qgb25lIGlzDQppcnJlbGV2YW50Lg0KDQpbV2VsbCwgaWYgdGhlIHNl Y29uZCBwb2lzb25lZCBsaW5lIGlzIGltbWVkaWF0ZWx5IGFmdGVyIHRoZSBmaXJzdA0KeW91IG1h eSBoaXQgaC93IHByZWZldGNoIGlzc3VlcyBhbmQgaC93IG1heSBzaWduYWwgYSBmYXRhbA0KbWFj aGluZSBjaGVjayAuLi4gYnV0IHRoYXQncyBhIGRpZmZlcmVudCBwcm9ibGVtIHRoYXQgcy93IGNv dWxkDQpvbmx5IHNvbHZlIHdpdGggcGFpbmZ1bCBMRkVOQ0Ugb3BlcmF0aW9ucyBiZXR3ZWVuIGVh Y2ggNjQtYnl0ZXMNCm9mIHRoZSBjb3B5XQ0KDQotVG9ueQ0K