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Biederman) To: Dan Carpenter References: <20191029182320.GA17569@mwanda> Date: Tue, 29 Oct 2019 14:02:11 -0500 In-Reply-To: <20191029182320.GA17569@mwanda> (Dan Carpenter's message of "Tue, 29 Oct 2019 21:23:20 +0300") Message-ID: <87zhhjjryk.fsf@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 X-XM-SPF: eid=1iPWl0-0006xT-3i; ; ; mid=<87zhhjjryk.fsf@x220.int.ebiederm.org>; ; ; hst=in02.mta.xmission.com; ; ; ip=68.227.160.95; ; ; frm=ebiederm@xmission.com; ; ; spf=neutral X-XM-AID: U2FsdGVkX18PHyqhwTatudH41XJqOC8sC0I5jQ9SR2U= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH] fbdev: potential information leak in do_fb_ioctl() X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) X-Mailman-Approved-At: Wed, 30 Oct 2019 08:14:00 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, security@kernel.org, Kees Cook , Bartlomiej Zolnierkiewicz , kernel-janitors@vger.kernel.org, Daniel Vetter , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Julia Lawall , Gerd Hoffmann , Sam Ravnborg , Peter Rosin , Andrea Righi Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191029190211.G0ruoaWCSHuUnceJKmYI4XVqEVXmbnAyPrI8Ol1NHLs@z> RGFuIENhcnBlbnRlciA8ZGFuLmNhcnBlbnRlckBvcmFjbGUuY29tPiB3cml0ZXM6Cgo+IFRoZSAi Zml4IiBzdHJ1Y3QgaGFzIGEgMiBieXRlIGhvbGUgYWZ0ZXIgLT55d3JhcHN0ZXAgYW5kIHRoZQo+ ICJmaXggPSBpbmZvLT5maXg7IiBhc3NpZ25tZW50IGRvZXNuJ3QgbmVjZXNzYXJpbHkgY2xlYXIg aXQuICBJdCBkZXBlbmRzCj4gb24gdGhlIGNvbXBpbGVyLgo+Cj4gRml4ZXM6IDFmNWUzMWQ3ZTU1 YSAoImZibWVtOiBkb24ndCBjYWxsIGNvcHlfZnJvbS90b191c2VyKCkgd2l0aCBtdXRleCBoZWxk IikKPiBTaWduZWQtb2ZmLWJ5OiBEYW4gQ2FycGVudGVyIDxkYW4uY2FycGVudGVyQG9yYWNsZS5j b20+Cj4gLS0tCj4gSSBoYXZlIDEzIG1vcmUgc2ltaWxhciBwbGFjZXMgdG8gcGF0Y2guLi4gIEkn bSBub3QgdG90YWxseSBzdXJlIEkKPiB1bmRlcnN0YW5kIGFsbCB0aGUgaXNzdWVzIGludm9sdmVk LgoKV2hhdCBJIGhhdmUgZG9uZSBpbiBhIHNpbWlsYXIgc2l0dWF0aW9uIHdpdGggc3RydWN0IHNp Z2luZm8sIGlzIHRoYXQKd2hlcmUgdGhlIHN0cnVjdHVyZSBmaXJzdCBhcHBlYXJzIEkgaGF2ZSBp bml0aWFsaXplZCBpdCB3aXRoIG1lbXNldCwKYW5kIHRoZW4gZmllbGQgYnkgZmllbGQuCgpUaGVu IHdoZW4gdGhlIHN0cnVjdHVyZSBpcyBjb3BpZWQgSSBjb3B5IHRoZSBzdHJ1Y3R1cmUgd2l0aCBt ZW1jcHkuCgpUaGF0IGVuc3VyZXMgYWxsIG9mIHRoZSBieXRlcyBpbiB0aGUgb3JpZ2luYWwgc3Ry dWN0dXJlIGFyZSBpbml0aWFsaXplZAphbmQgdGhhdCBhbGwgb2YgdGhlIGJ5dGVzIGFyZSBjb3Bp ZWQuCgpUaGUgZ29hbCBpcyB0byBhdm9pZCBtZW1vcnkgdGhhdCBoYXMgdmFsdWVzIG9mIHRoZSBw cmV2aW91cyB1c2VycyBvZgp0aGF0IG1lbW9yeSByZWdpb24gZnJvbSBsZWFraW5nIHRvIHVzZXJz cGFjZS4gIFdoaWNoIGRlcGVuZGluZyBvbiB3aG8KdGhlIHByZXZpb3VzIHVzZXIgb2YgdGhhdCBt ZW1vcnkgcmVnaW9uIGlzIGNvdWxkIHRlbGwgdXNlcnNwYWNlCmluZm9ybWF0aW9uIGFib3V0IHdo YXQgdGhlIGtlcm5lbCBpcyBkb2luZyB0aGF0IGl0IHNob3VsZCBub3QgYmUgYWxsb3dlZAp0byBm aW5kIG91dC4KCkkgdHJpZWQgdG8gdHJhY2UgdGhyb3VnaCB3aGVyZSAiaW5mbyIgYW5kIHRodXMg cHJlc3VtYWJseSAiaW5mby0+Zml4IiBpcwpjb21pbmcgZnJvbSBhbmQgb25seSBtYWRlIGl0IGFz IGZhciBhcyAgcmVnaXN0ZXJfZnJhbWVidWZmZXIuICBHaXZlbgp0aGF0IEkgc3VzcGVjdCBhIGxv Y2FsIG1lbXNldCwgYW5kIHRoZW4gYSBmaWVsZCBieSBmaWVsZCBjb3B5IHJpZ2h0CmJlZm9yZSBj b3B5X3RvX3VzZXIgbWlnaHQgYmUgYSBzb3VuZCBzb2x1dGlvbi4gIEJ1dCBpY2suICBUaGF0IGlz IGEgbG90Cm9mIGZpZWxkcyB0byBjb3B5LgoKCkVyaWMKCgoKPiAgZHJpdmVycy92aWRlby9mYmRl di9jb3JlL2ZibWVtLmMgfCAxICsKPiAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCspCj4K PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aWRlby9mYmRldi9jb3JlL2ZibWVtLmMgYi9kcml2ZXJz L3ZpZGVvL2ZiZGV2L2NvcmUvZmJtZW0uYwo+IGluZGV4IDZmNmZjNzg1YjU0NS4uYjRjZTZhMjhh ZWQ5IDEwMDY0NAo+IC0tLSBhL2RyaXZlcnMvdmlkZW8vZmJkZXYvY29yZS9mYm1lbS5jCj4gKysr IGIvZHJpdmVycy92aWRlby9mYmRldi9jb3JlL2ZibWVtLmMKPiBAQCAtMTEwOSw2ICsxMTA5LDcg QEAgc3RhdGljIGxvbmcgZG9fZmJfaW9jdGwoc3RydWN0IGZiX2luZm8gKmluZm8sIHVuc2lnbmVk IGludCBjbWQsCj4gIAkJCXJldCA9IC1FRkFVTFQ7Cj4gIAkJYnJlYWs7Cj4gIAljYXNlIEZCSU9H RVRfRlNDUkVFTklORk86Cj4gKwkJbWVtc2V0KCZmaXgsIDAsIHNpemVvZihmaXgpKTsKPiAgCQls b2NrX2ZiX2luZm8oaW5mbyk7Cj4gIAkJZml4ID0gaW5mby0+Zml4Owo+ICAJCWlmIChpbmZvLT5m bGFncyAmIEZCSU5GT19ISURFX1NNRU1fU1RBUlQpCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxp c3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2RyaS1kZXZlbA==