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Tue, 04 Jan 2022 01:54:00 -0700 Received: from mtkmbs10n1.mediatek.inc (172.21.101.34) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 4 Jan 2022 00:43:57 -0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Tue, 4 Jan 2022 16:43:56 +0800 Received: from mszswglt01 (10.16.20.20) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 4 Jan 2022 16:43:55 +0800 Message-ID: Subject: Re: [PATCH v2] dma-buf: dma-heap: Add a size check for allocation From: Guangming.Cao To: Christian =?ISO-8859-1?Q?K=F6nig?= , "John Stultz" CC: Sumit Semwal , Benjamin Gaignard , Liam Mark , "Laura Abbott" , Brian Starkey , Matthias Brugger , "open list:DMA-BUF HEAPS FRAMEWORK" , "open list:DMA-BUF HEAPS FRAMEWORK" , "moderated list:DMA-BUF HEAPS FRAMEWORK" , open list , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" , Bo Song , Libo Kang , jianjiao zeng , mingyuan ma , "Yunfei Wang" , Date: Tue, 4 Jan 2022 16:44:45 +0800 In-Reply-To: References: <20211217094104.24977-1-guangming.cao@mediatek.com> <20211227095102.6054-1-guangming.cao@mediatek.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220104_005404_898626_062AE0B2 X-CRM114-Status: GOOD ( 33.83 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org T24gVHVlLCAyMDIyLTAxLTA0IGF0IDA4OjQ3ICswMTAwLCBDaHJpc3RpYW4gS8O2bmlnIHdyb3Rl Og0KPiBBbSAwMy4wMS4yMiB1bSAxOTo1NyBzY2hyaWViIEpvaG4gU3R1bHR6Og0KPiA+IE9uIE1v biwgRGVjIDI3LCAyMDIxIGF0IDE6NTIgQU0gPGd1YW5nbWluZy5jYW9AbWVkaWF0ZWsuY29tPiB3 cm90ZToNCj4gPiA+IEZyb206IEd1YW5nbWluZyA8R3VhbmdtaW5nLkNhb0BtZWRpYXRlay5jb20+ DQo+ID4gPiANCj4gPiANCj4gPiBUaGFua3MgZm9yIHN1Ym1pdHRpbmcgdGhpcyENCj4gPiANCj4g PiA+IEFkZCBhIHNpemUgY2hlY2sgZm9yIGFsbGNhdGlvbiBzaW5jZSB0aGUgYWxsb2NhdGlvbiBz aXplIGlzDQo+ID4gDQo+ID4gbml0OiAiYWxsb2NhdGlvbiIgYWJvdmUuDQo+ID4gDQo+ID4gPiBh bHdheXMgbGVzcyB0aGFuIHRoZSB0b3RhbCBEUkFNIHNpemUuDQo+ID4gDQo+ID4gSW4gZ2VuZXJh bCwgaXQgbWlnaHQgYmUgZ29vZCB0byBhZGQgbW9yZSBjb250ZXh0IHRvIHRoZSBjb21taXQNCj4g PiBtZXNzYWdlDQo+ID4gdG8gYmV0dGVyIGFuc3dlciAqd2h5KiB0aGlzIGNoYW5nZSBpcyBuZWVk ZWQgcmF0aGVyIHRoYW4gd2hhdCB0aGUNCj4gPiBjaGFuZ2UgaXMgZG9pbmcuICBpZTogV2hhdCBu ZWdhdGl2ZSB0aGluZyBoYXBwZW5zIHdpdGhvdXQgdGhpcw0KPiA+IGNoYW5nZT8NCj4gPiBBbmQg c28gaG93IGRvZXMgdGhpcyBjaGFuZ2UgYXZvaWQgb3IgaW1wcm92ZSB0aGluZ3M/DQo+IA0KPiBD b21wbGV0ZWx5IGFncmVlLCBqdXN0IG9uZSBsaXR0bGUgYWRkaXRpb246IENvdWxkIHlvdSBhbHNv IGFkZCB0aGlzDQo+IHdoeSANCj4gYXMgY29tbWVudCB0byB0aGUgY29kZT8NCj4gDQo+IFdoZW4g d2Ugc3R1bWJsZSBvdmVyIHRoaXMgZml2ZSB5ZWFycyBmcm9tIG5vdyBpdCBpcyBhYnNvbHV0ZWx5 IG5vdCANCj4gb2J2aW91cyB3aHkgd2UgZG8gdGhpcy4NClRoYW5rcyBmb3IgeW91ciByZXBseSEN Ckkgd2lsbCB1cGRhdGUgdGhlIHJlbGF0ZWQgcmVhc29uIGluIHRoZSBwYXRjaCBsYXRlci4NCg0K VGhlIHJlYXNvbiBmb3IgYWRkaW5nIHRoaXMgY2hlY2sgaXMgdGhhdCB3ZSBtZXQgYSBjYXNlIHRo YXQgdGhlIHVzZXINCnNlbnQgYW4gaW52YWxpZCBzaXplKEl0IHNlZW1zIGl0J3MgYSBuZWdhdGl2 ZSB2YWx1ZSwgTVNCIGlzIDB4ZmYsIGl0J3MNCmxhcmdlciB0aGFuIERSQU0gc2l6ZSBhZnRlciBj b252ZXJ0IGl0IHRvIHNpemVfdCkgdG8gZG1hLWhlYXAgdG8gYWxsb2MNCm1lbW9yeSwgYW5kIHRo aXMgYWxsb2NhdGlvbiB3YXMgcnVubmluZyBvbiBhIHByb2Nlc3Moc3VjaCBhcyAiZ3JhbGxvYyIN Cm9uIEFuZHJvaWQgZGV2aWNlKSBjYW4ndCBiZSBraWxsZWQgYnkgT09NIGZsb3csIGFuZCB3ZSBh bHNvIGNvdWxkbid0DQpmaW5kIHRoZSByZWxhdGVkIGRtYWJ1ZiBpbiAiZG1hX2J1Zl9kZWJ1Z19z aG93IiBiZWNhdXNlIHRoZSByZWxhdGVkDQpkbWFidWYgd2FzIG5vdCBleHBvcnRlZCB5ZXQgc2lu Y2UgdGhlIGFsbG9jYXRpb24gaXMgc3RpbGwgb24gZ29pbmcuDQoNClNpbmNlIHRoaXMgaW52YWxp ZCBhcmd1bWVudCBjYXNlIGNhbiBiZSBwcmV2ZW50ZWQgYXQgZG1hLWhlYXAgc2lkZSwgc28sDQpJ IGFkZGVkIHRoaXMgc2l6ZSBjaGVjaywgYW5kIG1vcmVvdmVyLCB0byBsZXQgZGVidWcgaXQgZWFz aWx5LCBJIGFsc28NCmFkZGVkIGxvZ3Mgd2hlbiBzaXplIGlzIGJpZ2dlciB0aGFuIGEgdGhyZXNo b2xkIHdlIHNldCBpbiBtdGsgc3lzdGVtDQpoZWFwLg0KSWYgeW91IHRoaW5rIHRoYXQgcHJpbnQg bG9ncyBpbiBkbWEtaGVhcCBmcmFtZXdvcmsgaXMgYmV0dGVyLCBJIHdpbGwNCnVwZGF0ZSBpdCBp biBuZXh0IHZlcnNpb24uDQoNCklmIHlvdSBoYXZlIGJldHRlciBzb2x1dGlvbihzdWNoIGFzIGR1 bXAgdGhlIHNpemUgdW5kZXIgYWxsb2NhdGluZw0KaW4gImRtYV9idWZfZGVidWdfc2hvdyIsIHdo aWNoIG1heWJlIG5lZWQgYWRkIGdsb2JhbCB2YXJpYWJsZSB0byByZWNvcmQNCml0KSwgcGxlYXNl IGtpbmRseSBsZXQgbWUga25vdywgdGhhbmtzIDopDQoNCj4gDQo+IFRoYW5rcywNCj4gQ2hyaXN0 aWFuLg0KPiANCj4gPiANCj4gPiANCj4gPiA+IFNpZ25lZC1vZmYtYnk6IEd1YW5nbWluZyA8R3Vh bmdtaW5nLkNhb0BtZWRpYXRlay5jb20+DQo+ID4gPiBTaWduZWQtb2ZmLWJ5OiBqaWFuamlhbyB6 ZW5nIDxqaWFuamlhby56ZW5nQG1lZGlhdGVrLmNvbT4NCj4gPiA+IC0tLQ0KPiA+ID4gdjI6IDEu IHVwZGF0ZSBzaXplIGxpbWl0YXRpb24gYXMgdG90YWxfZHJhbSBwYWdlIHNpemUuDQo+ID4gPiAg ICAgIDIuIHVwZGF0ZSBjb21taXQgbWVzc2FnZQ0KPiA+ID4gLS0tDQo+ID4gPiAgIGRyaXZlcnMv ZG1hLWJ1Zi9kbWEtaGVhcC5jIHwgMiArKw0KPiA+ID4gICAxIGZpbGUgY2hhbmdlZCwgMiBpbnNl cnRpb25zKCspDQo+ID4gPiANCj4gPiA+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2RtYS1idWYvZG1h LWhlYXAuYyBiL2RyaXZlcnMvZG1hLWJ1Zi9kbWEtDQo+ID4gPiBoZWFwLmMNCj4gPiA+IGluZGV4 IDU2YmY1YWQwMWFkNS4uZTM5ZDJiZTk4ZDY5IDEwMDY0NA0KPiA+ID4gLS0tIGEvZHJpdmVycy9k bWEtYnVmL2RtYS1oZWFwLmMNCj4gPiA+ICsrKyBiL2RyaXZlcnMvZG1hLWJ1Zi9kbWEtaGVhcC5j DQo+ID4gPiBAQCAtNTUsNiArNTUsOCBAQCBzdGF0aWMgaW50IGRtYV9oZWFwX2J1ZmZlcl9hbGxv YyhzdHJ1Y3QNCj4gPiA+IGRtYV9oZWFwICpoZWFwLCBzaXplX3QgbGVuLA0KPiA+ID4gICAgICAg ICAgc3RydWN0IGRtYV9idWYgKmRtYWJ1ZjsNCj4gPiA+ICAgICAgICAgIGludCBmZDsNCj4gPiA+ IA0KPiA+ID4gKyAgICAgICBpZiAobGVuIC8gUEFHRV9TSVpFID4gdG90YWxyYW1fcGFnZXMoKSkN Cj4gPiA+ICsgICAgICAgICAgICAgICByZXR1cm4gLUVJTlZBTDsNCj4gPiANCj4gPiBUaGlzIHNl ZW1zIHNhbmUuIEkga25vdyBJT04gdXNlZCB0byBoYXZlIHNvbWUgMS8yIG9mIG1lbW9yeSBjYXAg dG8NCj4gPiBhdm9pZCB1bm5lY2Vzc2FyeSBtZW1vcnkgcHJlc3N1cmUgb24gY3JhenkgYWxsb2Nh dGlvbnMuDQo+ID4gDQo+ID4gQ291bGQgeW91IHNlbmQgYWdhaW4gd2l0aCBhbiBpbXByb3ZlZCBj b21taXQgbWVzc2FnZT8NCj4gPiANCj4gPiB0aGFua3MNCj4gPiAtam9obg0KPiANCj4gDQpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1tZWRpYXRl ayBtYWlsaW5nIGxpc3QKTGludXgtbWVkaWF0ZWtAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8v bGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LW1lZGlhdGVrCg==