From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haiyang Zhang Subject: RE: [PATCH v2 net-next] net: make skb_set_owner_w() more robust Date: Mon, 2 Nov 2015 20:05:12 +0000 Message-ID: References: <1446249142.6254.47.camel@edumazet-glaptop2.roam.corp.google.com> <1446398459.6254.90.camel@edumazet-glaptop2.roam.corp.google.com> <20151101.155859.1206189858863918018.davem@davemloft.net> <1446417380.6254.93.camel@edumazet-glaptop2.roam.corp.google.com> <1446418728.6254.101.camel@edumazet-glaptop2.roam.corp.google.com> <1446421015.6254.106.camel@edumazet-glaptop2.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: "edumazet@google.com" , "netdev@vger.kernel.org" , KY Srinivasan To: Eric Dumazet , David Miller Return-path: Received: from mail-bl2on0128.outbound.protection.outlook.com ([65.55.169.128]:14615 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751217AbbKBUFQ (ORCPT ); Mon, 2 Nov 2015 15:05:16 -0500 In-Reply-To: <1446421015.6254.106.camel@edumazet-glaptop2.roam.corp.google.com> Content-Language: en-US Sender: netdev-owner@vger.kernel.org List-ID: DQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogRXJpYyBEdW1hemV0IFtt YWlsdG86ZXJpYy5kdW1hemV0QGdtYWlsLmNvbV0NCj4gU2VudDogU3VuZGF5LCBOb3ZlbWJlciAx LCAyMDE1IDY6MzcgUE0NCj4gVG86IERhdmlkIE1pbGxlciA8ZGF2ZW1AZGF2ZW1sb2Z0Lm5ldD4N Cj4gQ2M6IEhhaXlhbmcgWmhhbmcgPGhhaXlhbmd6QG1pY3Jvc29mdC5jb20+OyBlZHVtYXpldEBn b29nbGUuY29tOw0KPiBuZXRkZXZAdmdlci5rZXJuZWwub3JnOyBLWSBTcmluaXZhc2FuIDxreXNA bWljcm9zb2Z0LmNvbT4NCj4gU3ViamVjdDogW1BBVENIIHYyIG5ldC1uZXh0XSBuZXQ6IG1ha2Ug c2tiX3NldF9vd25lcl93KCkgbW9yZSByb2J1c3QNCj4gDQo+IEZyb206IEVyaWMgRHVtYXpldCA8 ZWR1bWF6ZXRAZ29vZ2xlLmNvbT4NCj4gDQo+IHNrYl9zZXRfb3duZXJfdygpIGlzIGNhbGxlZCBm cm9tIHZhcmlvdXMgcGxhY2VzIHRoYXQgYXNzdW1lDQo+IHNrYi0+c2sgYWx3YXlzIHBvaW50IHRv IGEgZnVsbCBibG93biBzb2NrZXQgKGFzIGl0IGNoYW5nZXMNCj4gc2stPnNrX3dtZW1fYWxsb2Mp DQo+IA0KPiBXZSdkIGxpa2UgdG8gYXR0YWNoIHNrYiB0byByZXF1ZXN0IHNvY2tldHMsIGFuZCBp biB0aGUgZnV0dXJlDQo+IHRvIHRpbWV3YWl0IHNvY2tldHMgYXMgd2VsbC4gRm9yIHRoZXNlIGtp bmQgb2YgcHNldWRvIHNvY2tldHMsDQo+IHdlIG5lZWQgdG8gdGFrZSBhIHRyYWRpdGlvbmFsIHJl ZmNvdW50IGFuZCB1c2Ugc29ja19lZGVtdXgoKQ0KPiBhcyB0aGUgZGVzdHJ1Y3Rvci4NCj4gDQo+ IEl0IGlzIG5vdyB0aW1lIHRvIHVuLWlubGluZSBza2Jfc2V0X293bmVyX3coKSwgYmVpbmcgdG9v IGJpZy4NCj4gDQo+IEZpeGVzOiBjYTZmYjA2NTE4ODMgKCJ0Y3A6IGF0dGFjaCBTWU5BQ0sgbWVz c2FnZXMgdG8gcmVxdWVzdCBzb2NrZXRzDQo+IGluc3RlYWQgb2YgbGlzdGVuZXIiKQ0KPiBTaWdu ZWQtb2ZmLWJ5OiBFcmljIER1bWF6ZXQgPGVkdW1hemV0QGdvb2dsZS5jb20+DQo+IEJpc2VjdGVk LWJ5OiBIYWl5YW5nIFpoYW5nIDxoYWl5YW5nekBtaWNyb3NvZnQuY29tPg0KPiAtLS0NCj4gdjI6 IHNvY2tfZWRlbXV4KCkgbXVzdCBiZSBndWFyZGVkIGJ5IENPTkZJR19JTkVUDQo+IA0KPiAgaW5j bHVkZS9uZXQvc29jay5oICAgIHwgICAxNyArKy0tLS0tLS0tLS0tLS0tLQ0KPiAgbmV0L2NvcmUv c29jay5jICAgICAgIHwgICAyMiArKysrKysrKysrKysrKysrKysrKysrDQo+ICBuZXQvaXB2NC90 Y3Bfb3V0cHV0LmMgfCAgICA0ICstLS0NCj4gIDMgZmlsZXMgY2hhbmdlZCwgMjUgaW5zZXJ0aW9u cygrKSwgMTggZGVsZXRpb25zKC0pDQo+IA0KPiBkaWZmIC0tZ2l0IGEvaW5jbHVkZS9uZXQvc29j ay5oIGIvaW5jbHVkZS9uZXQvc29jay5oDQo+IGluZGV4IGFlZWQ1Yzk1ZjNjYS4uZjU3MGU3NWUz ZGE5IDEwMDY0NA0KPiAtLS0gYS9pbmNsdWRlL25ldC9zb2NrLmgNCj4gKysrIGIvaW5jbHVkZS9u ZXQvc29jay5oDQo+IEBAIC0xOTUxLDYgKzE5NTEsOCBAQCBzdGF0aWMgaW5saW5lIHZvaWQgc2ti X3NldF9oYXNoX2Zyb21fc2soc3RydWN0DQo+IHNrX2J1ZmYgKnNrYiwgc3RydWN0IHNvY2sgKnNr KQ0KPiAgCX0NCj4gIH0NCj4gDQo+ICt2b2lkIHNrYl9zZXRfb3duZXJfdyhzdHJ1Y3Qgc2tfYnVm ZiAqc2tiLCBzdHJ1Y3Qgc29jayAqc2spOw0KPiArDQo+ICAvKg0KPiAgICoJUXVldWUgYSByZWNl aXZlZCBkYXRhZ3JhbSBpZiBpdCB3aWxsIGZpdC4gU3RyZWFtIGFuZCBzZXF1ZW5jZWQNCj4gICAq CXByb3RvY29scyBjYW4ndCBub3JtYWxseSB1c2UgdGhpcyBhcyB0aGV5IG5lZWQgdG8gZml0IGJ1 ZmZlcnMgaW4NCj4gQEAgLTE5NTksMjEgKzE5NjEsNiBAQCBzdGF0aWMgaW5saW5lIHZvaWQgc2ti X3NldF9oYXNoX2Zyb21fc2soc3RydWN0DQo+IHNrX2J1ZmYgKnNrYiwgc3RydWN0IHNvY2sgKnNr KQ0KPiAgICoJSW5saW5lZCBhcyBpdCdzIHZlcnkgc2hvcnQgYW5kIGNhbGxlZCBmb3IgcHJldHR5 IG11Y2ggZXZlcnkNCj4gICAqCXBhY2tldCBldmVyIHJlY2VpdmVkLg0KPiAgICovDQo+IC0NCj4g LXN0YXRpYyBpbmxpbmUgdm9pZCBza2Jfc2V0X293bmVyX3coc3RydWN0IHNrX2J1ZmYgKnNrYiwg c3RydWN0IHNvY2sgKnNrKQ0KPiAtew0KPiAtCXNrYl9vcnBoYW4oc2tiKTsNCj4gLQlza2ItPnNr ID0gc2s7DQo+IC0Jc2tiLT5kZXN0cnVjdG9yID0gc29ja193ZnJlZTsNCj4gLQlza2Jfc2V0X2hh c2hfZnJvbV9zayhza2IsIHNrKTsNCj4gLQkvKg0KPiAtCSAqIFdlIHVzZWQgdG8gdGFrZSBhIHJl ZmNvdW50IG9uIHNrLCBidXQgZm9sbG93aW5nIG9wZXJhdGlvbg0KPiAtCSAqIGlzIGVub3VnaCB0 byBndWFyYW50ZWUgc2tfZnJlZSgpIHdvbnQgZnJlZSB0aGlzIHNvY2sgdW50aWwNCj4gLQkgKiBh bGwgaW4tZmxpZ2h0IHBhY2tldHMgYXJlIGNvbXBsZXRlZA0KPiAtCSAqLw0KPiAtCWF0b21pY19h ZGQoc2tiLT50cnVlc2l6ZSwgJnNrLT5za193bWVtX2FsbG9jKTsNCj4gLX0NCj4gLQ0KPiAgc3Rh dGljIGlubGluZSB2b2lkIHNrYl9zZXRfb3duZXJfcihzdHJ1Y3Qgc2tfYnVmZiAqc2tiLCBzdHJ1 Y3Qgc29jayAqc2spDQo+ICB7DQo+ICAJc2tiX29ycGhhbihza2IpOw0KPiBkaWZmIC0tZ2l0IGEv bmV0L2NvcmUvc29jay5jIGIvbmV0L2NvcmUvc29jay5jDQo+IGluZGV4IDBlZjMwYWE5MDEzMi4u NzUyOWViOTQ2M2JlIDEwMDY0NA0KPiAtLS0gYS9uZXQvY29yZS9zb2NrLmMNCj4gKysrIGIvbmV0 L2NvcmUvc29jay5jDQo+IEBAIC0xNjU2LDYgKzE2NTYsMjggQEAgdm9pZCBzb2NrX3dmcmVlKHN0 cnVjdCBza19idWZmICpza2IpDQo+ICB9DQo+ICBFWFBPUlRfU1lNQk9MKHNvY2tfd2ZyZWUpOw0K PiANCj4gK3ZvaWQgc2tiX3NldF9vd25lcl93KHN0cnVjdCBza19idWZmICpza2IsIHN0cnVjdCBz b2NrICpzaykNCj4gK3sNCj4gKwlza2Jfb3JwaGFuKHNrYik7DQo+ICsJc2tiLT5zayA9IHNrOw0K PiArI2lmZGVmIENPTkZJR19JTkVUDQo+ICsJaWYgKHVubGlrZWx5KCFza19mdWxsc29jayhzaykp KSB7DQoNClRoYW5rcyBmb3IgdGhlIGZpeCENCkZvciBzb21lIGRyaXZlciwgbGlrZSBvdXJzLCB0 aGlzIGNvbmRpdGlvbiBtYXkgbm90IGJlICJ1bmxpa2VseSIuDQpTbyBjb3VsZCB5b3UgcmVtb3Zl IHRoZSAidW5saWtlbHkiPw0KDQpUaGFua3MsDQotIEhhaXlhbmcNCg0KDQo=