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Donenfeld" , "rdunlap@infradead.org" , "decui@microsoft.com" , Jakub Sitnicki , "jeremy@azazel.net" , "mashirle@us.ibm.com" , linux-kernel Subject: Re: [PATCH 1/5] net: Fix potential deadloop in skb_copy_ubufs() Thread-Topic: [PATCH 1/5] net: Fix potential deadloop in skb_copy_ubufs() Thread-Index: AdZyCng8yL/EIjdPQ3Gs3ioJM4VpUQ== Date: Fri, 14 Aug 2020 07:14:39 +0000 Message-ID: <6e3bace9ebea4f59a567a9ab0ef85d90@huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.174.176.252] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org V2lsbGVtIGRlIEJydWlqbiA8d2lsbGVtZGVicnVpam4ua2VybmVsQGdtYWlsLmNvbT4gd3JvdGU6 DQo+T24gVGh1LCBBdWcgNiwgMjAyMCBhdCAxOjQ4IFBNIGxpbm1pYW9oZSA8bGlubWlhb2hlQGh1 YXdlaS5jb20+IHdyb3RlOg0KPj4NCj4+IEZyb206IE1pYW9oZSBMaW4gPGxpbm1pYW9oZUBodWF3 ZWkuY29tPg0KPj4NCj4+IFdlIGNvdWxkIGJlIHRyYXBwZWQgaW4gZGVhZGxvb3Agd2hlbiB3ZSB0 cnkgdG8gY29weSB1c2Vyc3BhY2Ugc2tiIA0KPj4gZnJhZ3MgYnVmZmVycyB0byBrZXJuZWwgd2l0 aCBhIGNsb25lZCBza2I6DQo+PiBSZXByb2R1Y2UgY29kZSBzbmlwcGV0Og0KPj4gICAgICAgICBz a2IgPSBhbGxvY19za2IoVUJVRl9EQVRBX0xFTiwgR0ZQX0FUT01JQyk7DQo+PiAgICAgICAgIGNs b25lID0gc2tiX2Nsb25lKHNrYiwgR0ZQX0FUT01JQyk7DQo+PiAgICAgICAgIHNrYl96Y29weV9z ZXRfbm91YXJnKGNsb25lLCBOVUxMKTsNCj4+ICAgICAgICAgcHNrYl9leHBhbmRfaGVhZChza2Is IDAsIDAsIEdGUF9BVE9NSUMpOw0KPj4NCj4+IENhdGNoIHRoaXMgdW5leHBlY3RlZCBjYXNlIGFu ZCByZXR1cm4gLUVJTlZBTCBpbiBza2Jfb3JwaGFuX2ZyYWdzKCkgDQo+PiBiZWZvcmUgd2UgY2Fs bCBza2JfY29weV91YnVmcygpIHRvIGZpeCBpdC4NCj4NCj5JcyB0aGlzIGEgaHlwb3RoZXRpY2Fs IGNvZGVwYXRoPw0KPg0KPnNrYiB6ZXJvY29weSBjYXJlZnVsbHkgdHJhY2tzIGNsb25lIGNhbGxz IHdoZXJlIG5lY2Vzc2FyeS4gU2VlIHRoZSBjYWxsIHRvIHNrYl9vcnBoYW5fZnJhZ3MgaW4gc2ti X2Nsb25lLCBhbmQgdGhlIGltcGxlbWVudGF0aW9uIG9mIHRoYXQgY2FsbGVlLg0KPg0KPlRoZSBv bmx5IGNhbGxlciBvZiBza2IgemVyb2NvcHkgd2l0aCBub3VhcmcgaXMgdHBhY2tldF9maWxsX3Nr YiwgYXMgb2YgY29tbWl0IDVjZDhkNDZlYTE1NiAoInBhY2tldDogY29weSB1c2VyIGJ1ZmZlcnMg YmVmb3JlIG9ycGhhbiBvciBjbG9uZSIpLg0KPg0KPkFzIHRoZSBjb21taXQgc3ViamVjdCBpbmRp Y2F0ZXMsIHRoaXMgc2V0cyBza2JfemNvcHlfc2V0X25vdWFyZyBleGFjdGx5IHRvIGJlIHN1cmUg dGhhdCBhbnkgY2xvbmUgd2lsbCB0cmlnZ2VyIGEgY29weSBvZiAiemVyb2NvcHkiDQo+dXNlciBk YXRhIHRvIHByaXZhdGUga2VybmVsIG1lbW9yeS4NCj4NCj5ObyBjbG9uZSBtdXN0IGhhcHBlbiBi ZXR3ZWVuIGFsbG9jX3NrYiBhbmQgc2tiX3pjb3B5X3NldF9ub3VhcmcsIGluZGVlZC4gQnV0IEFG QUlLLCBub25lIGV4aXN0cy4NCg0KU2luY2Ugd2UgYWx3YXlzIGNhbGwgc2tiX29ycGhhbl9mcmFn cyBpbiBza2JfY2xvbmUsIGlzIGl0IHVubmVjZXNzYXJ5IHRvIGNhbGwgc2tiX29ycGhhbl9mcmFn cyBpbiBwc2tiX2V4cGFuZF9oZWFkIHdoZW4gc2tiIGlzIGNsb25lZCA/DQoNClRoYW5rcy4NCg0K