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Fri, 06 May 2022 13:39:45 +0000 Message-ID: Date: Fri, 6 May 2022 15:39:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [PATCH] fbdev: efifb: Fix a use-after-free due early fb_info cleanup Content-Language: en-US To: Javier Martinez Canillas , linux-kernel@vger.kernel.org References: <20220506132225.588379-1-javierm@redhat.com> From: Thomas Zimmermann In-Reply-To: <20220506132225.588379-1-javierm@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------mhL0gUPSrk4f7zq6G9SeQHiX" X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Daniel Vetter , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Peter Jones , Andrzej Hajda , Helge Deller Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------mhL0gUPSrk4f7zq6G9SeQHiX Content-Type: multipart/mixed; boundary="------------O92hj00bA01kfyO5mM0pT6ih"; protected-headers="v1" From: Thomas Zimmermann To: Javier Martinez Canillas , linux-kernel@vger.kernel.org Cc: Andrzej Hajda , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , intel-gfx@lists.freedesktop.org, Daniel Vetter , Helge Deller , Peter Jones , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Message-ID: Subject: Re: [PATCH] fbdev: efifb: Fix a use-after-free due early fb_info cleanup References: <20220506132225.588379-1-javierm@redhat.com> In-Reply-To: <20220506132225.588379-1-javierm@redhat.com> --------------O92hj00bA01kfyO5mM0pT6ih Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQpBbSAwNi4wNS4yMiB1bSAxNToyMiBzY2hyaWViIEphdmllciBNYXJ0aW5leiBDYW5pbGxh czoNCj4gQ29tbWl0IGQyNThkMDBmYjljNyAoImZiZGV2OiBlZmlmYjogQ2xlYW51cCBmYl9p bmZvIGluIC5mYl9kZXN0cm95IHJhdGhlcg0KPiB0aGFuIC5yZW1vdmUiKSBhdHRlbXB0ZWQg dG8gZml4IGEgdXNlLWFmdGVyLWZyZWUgZXJyb3IgZHVlIGRyaXZlciBmcmVlaW5nDQo+IHRo ZSBmYl9pbmZvIGluIHRoZSAucmVtb3ZlIGhhbmRsZXIgaW5zdGVhZCBvZiBkb2luZyBpdCBp biAuZmJfZGVzdHJveS4NCj4gDQo+IEJ1dCBpcm9uaWNhbGx5IHRoYXQgY2hhbmdlIGludHJv ZHVjZWQgeWV0IGFub3RoZXIgdXNlLWFmdGVyLWZyZWUgc2luY2UgdGhlDQo+IGZiX2luZm8g d2FzIHN0aWxsIHVzZWQgYWZ0ZXIgdGhlIGZyZWUuDQo+IA0KPiBUaGlzIHNob3VsZCBmaXgg Zm9yIGdvb2QgYnkgZnJlZWluZyB0aGUgZmJfaW5mbyBhdCB0aGUgZW5kIG9mIHRoZSBoYW5k bGVyLg0KPiANCj4gRml4ZXM6IGQyNThkMDBmYjljNyAoImZiZGV2OiBlZmlmYjogQ2xlYW51 cCBmYl9pbmZvIGluIC5mYl9kZXN0cm95IHJhdGhlciB0aGFuIC5yZW1vdmUiKQ0KPiBSZXBv cnRlZC1ieTogVmlsbGUgU3lyasOkbMOkIDx2aWxsZS5zeXJqYWxhQGxpbnV4LmludGVsLmNv bT4NCj4gUmVwb3J0ZWQtYnk6IEFuZHJ6ZWogSGFqZGEgPGFuZHJ6ZWouaGFqZGFAaW50ZWwu Y29tPg0KPiBTaWduZWQtb2ZmLWJ5OiBKYXZpZXIgTWFydGluZXogQ2FuaWxsYXMgPGphdmll cm1AcmVkaGF0LmNvbT4NCg0KUmV2aWV3ZWQtYnk6IFRob21hcyBaaW1tZXJtYW5uIDx0emlt ZW1ybWFubkBzdXNlLmRlPg0KDQo+IC0tLQ0KPiANCj4gICBkcml2ZXJzL3ZpZGVvL2ZiZGV2 L2VmaWZiLmMgfCA0ICsrLS0NCj4gICAxIGZpbGUgY2hhbmdlZCwgMiBpbnNlcnRpb25zKCsp LCAyIGRlbGV0aW9ucygtKQ0KPiANCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmlkZW8vZmJk ZXYvZWZpZmIuYyBiL2RyaXZlcnMvdmlkZW8vZmJkZXYvZWZpZmIuYw0KPiBpbmRleCBjZmEz ZGMwYjRlZWUuLmIzZDVmODg0YzU0NCAxMDA2NDQNCj4gLS0tIGEvZHJpdmVycy92aWRlby9m YmRldi9lZmlmYi5jDQo+ICsrKyBiL2RyaXZlcnMvdmlkZW8vZmJkZXYvZWZpZmIuYw0KPiBA QCAtMjU5LDEyICsyNTksMTIgQEAgc3RhdGljIHZvaWQgZWZpZmJfZGVzdHJveShzdHJ1Y3Qg ZmJfaW5mbyAqaW5mbykNCj4gICAJCQltZW11bm1hcChpbmZvLT5zY3JlZW5fYmFzZSk7DQo+ ICAgCX0NCj4gICANCj4gLQlmcmFtZWJ1ZmZlcl9yZWxlYXNlKGluZm8pOw0KPiAtDQo+ICAg CWlmIChyZXF1ZXN0X21lbV9zdWNjZWVkZWQpDQo+ICAgCQlyZWxlYXNlX21lbV9yZWdpb24o aW5mby0+YXBlcnR1cmVzLT5yYW5nZXNbMF0uYmFzZSwNCj4gICAJCQkJICAgaW5mby0+YXBl cnR1cmVzLT5yYW5nZXNbMF0uc2l6ZSk7DQo+ICAgCWZiX2RlYWxsb2NfY21hcCgmaW5mby0+ Y21hcCk7DQo+ICsNCj4gKwlmcmFtZWJ1ZmZlcl9yZWxlYXNlKGluZm8pOw0KPiAgIH0NCj4g ICANCj4gICBzdGF0aWMgY29uc3Qgc3RydWN0IGZiX29wcyBlZmlmYl9vcHMgPSB7DQoNCi0t IA0KVGhvbWFzIFppbW1lcm1hbm4NCkdyYXBoaWNzIERyaXZlciBEZXZlbG9wZXINClNVU0Ug U29mdHdhcmUgU29sdXRpb25zIEdlcm1hbnkgR21iSA0KTWF4ZmVsZHN0ci4gNSwgOTA0MDkg TsO8cm5iZXJnLCBHZXJtYW55DQooSFJCIDM2ODA5LCBBRyBOw7xybmJlcmcpDQpHZXNjaMOk ZnRzZsO8aHJlcjogSXZvIFRvdGV2DQo= --------------O92hj00bA01kfyO5mM0pT6ih-- --------------mhL0gUPSrk4f7zq6G9SeQHiX Content-Type: application/pgp-signature; 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Fri, 06 May 2022 13:39:45 +0000 Message-ID: Date: Fri, 6 May 2022 15:39:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Content-Language: en-US To: Javier Martinez Canillas , linux-kernel@vger.kernel.org References: <20220506132225.588379-1-javierm@redhat.com> From: Thomas Zimmermann In-Reply-To: <20220506132225.588379-1-javierm@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------mhL0gUPSrk4f7zq6G9SeQHiX" Subject: Re: [Intel-gfx] [PATCH] fbdev: efifb: Fix a use-after-free due early fb_info cleanup X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Daniel Vetter , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, Peter Jones , Andrzej Hajda , Helge Deller Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------mhL0gUPSrk4f7zq6G9SeQHiX Content-Type: multipart/mixed; boundary="------------O92hj00bA01kfyO5mM0pT6ih"; protected-headers="v1" From: Thomas Zimmermann To: Javier Martinez Canillas , linux-kernel@vger.kernel.org Cc: Andrzej Hajda , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , intel-gfx@lists.freedesktop.org, Daniel Vetter , Helge Deller , Peter Jones , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Message-ID: Subject: Re: [PATCH] fbdev: efifb: Fix a use-after-free due early fb_info cleanup References: <20220506132225.588379-1-javierm@redhat.com> In-Reply-To: <20220506132225.588379-1-javierm@redhat.com> --------------O92hj00bA01kfyO5mM0pT6ih Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 DQpBbSAwNi4wNS4yMiB1bSAxNToyMiBzY2hyaWViIEphdmllciBNYXJ0aW5leiBDYW5pbGxh czoNCj4gQ29tbWl0IGQyNThkMDBmYjljNyAoImZiZGV2OiBlZmlmYjogQ2xlYW51cCBmYl9p bmZvIGluIC5mYl9kZXN0cm95IHJhdGhlcg0KPiB0aGFuIC5yZW1vdmUiKSBhdHRlbXB0ZWQg dG8gZml4IGEgdXNlLWFmdGVyLWZyZWUgZXJyb3IgZHVlIGRyaXZlciBmcmVlaW5nDQo+IHRo ZSBmYl9pbmZvIGluIHRoZSAucmVtb3ZlIGhhbmRsZXIgaW5zdGVhZCBvZiBkb2luZyBpdCBp biAuZmJfZGVzdHJveS4NCj4gDQo+IEJ1dCBpcm9uaWNhbGx5IHRoYXQgY2hhbmdlIGludHJv ZHVjZWQgeWV0IGFub3RoZXIgdXNlLWFmdGVyLWZyZWUgc2luY2UgdGhlDQo+IGZiX2luZm8g d2FzIHN0aWxsIHVzZWQgYWZ0ZXIgdGhlIGZyZWUuDQo+IA0KPiBUaGlzIHNob3VsZCBmaXgg Zm9yIGdvb2QgYnkgZnJlZWluZyB0aGUgZmJfaW5mbyBhdCB0aGUgZW5kIG9mIHRoZSBoYW5k bGVyLg0KPiANCj4gRml4ZXM6IGQyNThkMDBmYjljNyAoImZiZGV2OiBlZmlmYjogQ2xlYW51 cCBmYl9pbmZvIGluIC5mYl9kZXN0cm95IHJhdGhlciB0aGFuIC5yZW1vdmUiKQ0KPiBSZXBv cnRlZC1ieTogVmlsbGUgU3lyasOkbMOkIDx2aWxsZS5zeXJqYWxhQGxpbnV4LmludGVsLmNv bT4NCj4gUmVwb3J0ZWQtYnk6IEFuZHJ6ZWogSGFqZGEgPGFuZHJ6ZWouaGFqZGFAaW50ZWwu Y29tPg0KPiBTaWduZWQtb2ZmLWJ5OiBKYXZpZXIgTWFydGluZXogQ2FuaWxsYXMgPGphdmll cm1AcmVkaGF0LmNvbT4NCg0KUmV2aWV3ZWQtYnk6IFRob21hcyBaaW1tZXJtYW5uIDx0emlt ZW1ybWFubkBzdXNlLmRlPg0KDQo+IC0tLQ0KPiANCj4gICBkcml2ZXJzL3ZpZGVvL2ZiZGV2 L2VmaWZiLmMgfCA0ICsrLS0NCj4gICAxIGZpbGUgY2hhbmdlZCwgMiBpbnNlcnRpb25zKCsp LCAyIGRlbGV0aW9ucygtKQ0KPiANCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmlkZW8vZmJk ZXYvZWZpZmIuYyBiL2RyaXZlcnMvdmlkZW8vZmJkZXYvZWZpZmIuYw0KPiBpbmRleCBjZmEz ZGMwYjRlZWUuLmIzZDVmODg0YzU0NCAxMDA2NDQNCj4gLS0tIGEvZHJpdmVycy92aWRlby9m YmRldi9lZmlmYi5jDQo+ICsrKyBiL2RyaXZlcnMvdmlkZW8vZmJkZXYvZWZpZmIuYw0KPiBA QCAtMjU5LDEyICsyNTksMTIgQEAgc3RhdGljIHZvaWQgZWZpZmJfZGVzdHJveShzdHJ1Y3Qg ZmJfaW5mbyAqaW5mbykNCj4gICAJCQltZW11bm1hcChpbmZvLT5zY3JlZW5fYmFzZSk7DQo+ ICAgCX0NCj4gICANCj4gLQlmcmFtZWJ1ZmZlcl9yZWxlYXNlKGluZm8pOw0KPiAtDQo+ICAg CWlmIChyZXF1ZXN0X21lbV9zdWNjZWVkZWQpDQo+ICAgCQlyZWxlYXNlX21lbV9yZWdpb24o aW5mby0+YXBlcnR1cmVzLT5yYW5nZXNbMF0uYmFzZSwNCj4gICAJCQkJICAgaW5mby0+YXBl cnR1cmVzLT5yYW5nZXNbMF0uc2l6ZSk7DQo+ICAgCWZiX2RlYWxsb2NfY21hcCgmaW5mby0+ Y21hcCk7DQo+ICsNCj4gKwlmcmFtZWJ1ZmZlcl9yZWxlYXNlKGluZm8pOw0KPiAgIH0NCj4g ICANCj4gICBzdGF0aWMgY29uc3Qgc3RydWN0IGZiX29wcyBlZmlmYl9vcHMgPSB7DQoNCi0t IA0KVGhvbWFzIFppbW1lcm1hbm4NCkdyYXBoaWNzIERyaXZlciBEZXZlbG9wZXINClNVU0Ug U29mdHdhcmUgU29sdXRpb25zIEdlcm1hbnkgR21iSA0KTWF4ZmVsZHN0ci4gNSwgOTA0MDkg TsO8cm5iZXJnLCBHZXJtYW55DQooSFJCIDM2ODA5LCBBRyBOw7xybmJlcmcpDQpHZXNjaMOk ZnRzZsO8aHJlcjogSXZvIFRvdGV2DQo= --------------O92hj00bA01kfyO5mM0pT6ih-- --------------mhL0gUPSrk4f7zq6G9SeQHiX Content-Type: application/pgp-signature; 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