From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Li, Sun peng (Leo)" Subject: Re: [PATCH][drm-next] drm/amd/display: fix dereference of pointer fs_params before it is null checked Date: Tue, 20 Nov 2018 20:08:00 +0000 Message-ID: References: <20181120171745.13812-1-colin.king@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20181120171745.13812-1-colin.king@canonical.com> Content-Language: en-US Content-ID: <373C3230283B3C479C50A9205A0B7115@namprd12.prod.outlook.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Colin King , "Wentland, Harry" , "Deucher, Alexander" , "Koenig, Christian" , "Zhou, David(ChunMing)" , David Airlie , "amd-gfx@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" Cc: "kernel-janitors@vger.kernel.org" , "linux-kernel@vger.kernel.org" List-Id: amd-gfx.lists.freedesktop.org DQoNCk9uIDIwMTgtMTEtMjAgMTI6MTcgcC5tLiwgQ29saW4gS2luZyB3cm90ZToNCj4gRnJvbTog Q29saW4gSWFuIEtpbmcgPGNvbGluLmtpbmdAY2Fub25pY2FsLmNvbT4NCj4gDQo+IEN1cnJlbnRs eSB0aGVyZSBhcmUgc2V2ZXJhbCBpbnN0YW5jZXMgb2YgcG9pbnRlciBmc19wYXJhbXMgYmVpbmcN Cj4gZGVyZWZlcmVuY2VkIGJlZm9yZSBmc19wYXJhbXMgaXMgYmVpbmcgbnVsbCBjaGVja2VkLiAg Rml4IHRoaXMgYnkNCj4gb25seSBkZXJlZmVyZW5jaW5nIGZzX3BhcmFtcyBhZnRlciB0aGUgbnVs bCBjaGVjay4NCj4gDQo+IERldGVjdGVkIGJ5IENvdmVyaXR5U2NhbiwgQ0lEIzE0NzU1NjUgKCJE ZXJlZmVyZW5jZSBiZWZvcmUgbnVsbCBjaGVjayIpDQo+IA0KPiBGaXhlczogZTFlOGEwMjBjNmI4 ICgiZHJtL2FtZC9kaXNwbGF5OiBBZGQgc3VwcG9ydCBmb3IgRnJlZXN5bmMgMiBIRFIgYW5kIENv bnRlbnQgdG8gRGlzcGxheSBNYXBwaW5nIikNCj4gU2lnbmVkLW9mZi1ieTogQ29saW4gSWFuIEtp bmcgPGNvbGluLmtpbmdAY2Fub25pY2FsLmNvbT4NCg0KUmV2aWV3ZWQtYnk6IExlbyBMaSA8c3Vu cGVuZy5saUBhbWQuY29tPg0KDQpUaGFua3MhDQoNCj4gLS0tDQo+ICAgLi4uL2RybS9hbWQvZGlz cGxheS9tb2R1bGVzL2NvbG9yL2NvbG9yX2dhbW1hLmMgIHwgMTYgKysrKysrKysrKystLS0tLQ0K PiAgIDEgZmlsZSBjaGFuZ2VkLCAxMSBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygtKQ0KPiAN Cj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9hbWQvZGlzcGxheS9tb2R1bGVzL2NvbG9y L2NvbG9yX2dhbW1hLmMgYi9kcml2ZXJzL2dwdS9kcm0vYW1kL2Rpc3BsYXkvbW9kdWxlcy9jb2xv ci9jb2xvcl9nYW1tYS5jDQo+IGluZGV4IDc0ODBmMDcyYzM3NS4uYmJlY2JhZWZiNzQxIDEwMDY0 NA0KPiAtLS0gYS9kcml2ZXJzL2dwdS9kcm0vYW1kL2Rpc3BsYXkvbW9kdWxlcy9jb2xvci9jb2xv cl9nYW1tYS5jDQo+ICsrKyBiL2RyaXZlcnMvZ3B1L2RybS9hbWQvZGlzcGxheS9tb2R1bGVzL2Nv bG9yL2NvbG9yX2dhbW1hLmMNCj4gQEAgLTgxMywyMCArODEzLDI2IEBAIHN0YXRpYyBib29sIGJ1 aWxkX2ZyZWVzeW5jX2hkcihzdHJ1Y3QgcHdsX2Zsb2F0X2RhdGFfZXggKnJnYl9yZWdhbW1hLA0K PiAgIAljb25zdCBzdHJ1Y3QgaHdfeF9wb2ludCAqY29vcmRfeCA9IGNvb3JkaW5hdGVfeDsNCj4g ICAJc3RydWN0IGZpeGVkMzFfMzIgc2NhbGVkWCA9IGRjX2ZpeHB0X3plcm87DQo+ICAgCXN0cnVj dCBmaXhlZDMxXzMyIHNjYWxlZFgxID0gZGNfZml4cHRfemVybzsNCj4gLQlzdHJ1Y3QgZml4ZWQz MV8zMiBtYXhfZGlzcGxheSA9IGRjX2ZpeHB0X2Zyb21faW50KGZzX3BhcmFtcy0+bWF4X2Rpc3Bs YXkpOw0KPiAtCXN0cnVjdCBmaXhlZDMxXzMyIG1pbl9kaXNwbGF5ID0gZGNfZml4cHRfZnJvbV9m cmFjdGlvbihmc19wYXJhbXMtPm1pbl9kaXNwbGF5LCAxMDAwMCk7DQo+IC0Jc3RydWN0IGZpeGVk MzFfMzIgbWF4X2NvbnRlbnQgPSBkY19maXhwdF9mcm9tX2ludChmc19wYXJhbXMtPm1heF9jb250 ZW50KTsNCj4gLQlzdHJ1Y3QgZml4ZWQzMV8zMiBtaW5fY29udGVudCA9IGRjX2ZpeHB0X2Zyb21f ZnJhY3Rpb24oZnNfcGFyYW1zLT5taW5fY29udGVudCwgMTAwMDApOw0KPiArCXN0cnVjdCBmaXhl ZDMxXzMyIG1heF9kaXNwbGF5Ow0KPiArCXN0cnVjdCBmaXhlZDMxXzMyIG1pbl9kaXNwbGF5Ow0K PiArCXN0cnVjdCBmaXhlZDMxXzMyIG1heF9jb250ZW50Ow0KPiArCXN0cnVjdCBmaXhlZDMxXzMy IG1pbl9jb250ZW50Ow0KPiAgIAlzdHJ1Y3QgZml4ZWQzMV8zMiBjbGlwID0gZGNfZml4cHRfb25l Ow0KPiAgIAlzdHJ1Y3QgZml4ZWQzMV8zMiBvdXRwdXQ7DQo+ICAgCWJvb2wgdXNlX2VldGYgPSBm YWxzZTsNCj4gICAJYm9vbCBpc19jbGlwcGVkID0gZmFsc2U7DQo+IC0Jc3RydWN0IGZpeGVkMzFf MzIgc2RyX3doaXRlX2xldmVsID0gZGNfZml4cHRfZnJvbV9pbnQoZnNfcGFyYW1zLT5zZHJfd2hp dGVfbGV2ZWwpOw0KPiArCXN0cnVjdCBmaXhlZDMxXzMyIHNkcl93aGl0ZV9sZXZlbDsNCj4gICAN Cj4gICAJaWYgKGZzX3BhcmFtcyA9PSBOVUxMIHx8IGZzX3BhcmFtcy0+bWF4X2NvbnRlbnQgPT0g MCB8fA0KPiAgIAkJCWZzX3BhcmFtcy0+bWF4X2Rpc3BsYXkgPT0gMCkNCj4gICAJCXJldHVybiBm YWxzZTsNCj4gICANCj4gKwltYXhfZGlzcGxheSA9IGRjX2ZpeHB0X2Zyb21faW50KGZzX3BhcmFt cy0+bWF4X2Rpc3BsYXkpOw0KPiArCW1pbl9kaXNwbGF5ID0gZGNfZml4cHRfZnJvbV9mcmFjdGlv bihmc19wYXJhbXMtPm1pbl9kaXNwbGF5LCAxMDAwMCk7DQo+ICsJbWF4X2NvbnRlbnQgPSBkY19m aXhwdF9mcm9tX2ludChmc19wYXJhbXMtPm1heF9jb250ZW50KTsNCj4gKwltaW5fY29udGVudCA9 IGRjX2ZpeHB0X2Zyb21fZnJhY3Rpb24oZnNfcGFyYW1zLT5taW5fY29udGVudCwgMTAwMDApOw0K PiArCXNkcl93aGl0ZV9sZXZlbCA9IGRjX2ZpeHB0X2Zyb21faW50KGZzX3BhcmFtcy0+c2RyX3do aXRlX2xldmVsKTsNCj4gKw0KPiAgIAlpZiAoZnNfcGFyYW1zLT5taW5fZGlzcGxheSA+IDEwMDAp IC8vIGNhcCBhdCAwLjEgYXQgdGhlIGJvdHRvbQ0KPiAgIAkJbWluX2Rpc3BsYXkgPSBkY19maXhw dF9mcm9tX2ZyYWN0aW9uKDEsIDEwKTsNCj4gICAJaWYgKGZzX3BhcmFtcy0+bWF4X2Rpc3BsYXkg PCAxMDApIC8vIGNhcCBhdCAxMDAgYXQgdGhlIHRvcA0KPiANCl9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRl dmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbAo=