From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rebecca N. Palmer" Subject: [PATCH] drm/i915: Possible security hole in command parsing Date: Thu, 30 Apr 2015 12:32:15 +0100 Message-ID: <554212BF.1040309@zoho.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from sender1.zohomail.com (sender1.zohomail.com [74.201.84.158]) by gabe.freedesktop.org (Postfix) with ESMTP id AA8D26E7F0 for ; Thu, 30 Apr 2015 04:48:18 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org aTkxNV9wYXJzZV9jbWRzIHJldHVybnMgLUVBQ0NFUyBvbiBjaGFpbmVkIGJhdGNoZXMsIHdoaWNo ICJ0ZWxscyB0aGUKY2FsbGVyIHRvIGFib3J0IGFuZCBkaXNwYXRjaCB0aGUgd29ya2xvYWQgYXMg YSBub24tc2VjdXJlIGJhdGNoIiwKYnV0IHRoZSBtZWNoYW5pc20gaW1wbGVtZW50aW5nIHRoYXQg d2FzIGJyb2tlbiB3aGVuCmZsYWdzIHw9IEk5MTVfRElTUEFUQ0hfU0VDVVJFIHdhcyBtb3ZlZCBm cm9tIGk5MTVfZ2VtX2V4ZWNidWZmZXJfcGFyc2UKdG8gaTkxNV9nZW1fZG9fZXhlY2J1ZmZlciAo MTdjYWJmNTcxZTUwNjc3ZDk4MGU5YWIyYTQzYzVmMTEyMTMwMDNhZSk6Cmk5MTVfZ2VtX2V4ZWNi dWZmZXJfcGFyc2UgcmV0dXJucyB0aGUgb3JpZ2luYWwgYmF0Y2hfb2JqIGluIHRoaXMgY2FzZSwK YW5kIGk5MTVfZ2VtX2RvX2V4ZWNidWZmZXIgZG9lc24ndCBjaGVjayBmb3IgdGhhdC4KCklzIHRo aXMgYmVpbmcgbWFkZSBzZWN1cmUgc29tZSBvdGhlciB3YXkgKGluIHdoaWNoIGNhc2UgdGhlIG9i c29sZXRlCmNvbW1lbnRzIHNob3VsZCBwcm9iYWJseSBiZSByZW1vdmVkKSwgb3IgaXMgdGhpcyBh IHNlY3VyaXR5IGhvbGU/CgpXYXJuaW5nOiB0aGlzIGlzIG15IGZpcnN0IGtlcm5lbCBwYXRjaCwg YW5kIGhhcyBub3QgYmVlbiB0ZXN0ZWQgeWV0LgpTaWduZWQtb2ZmLWJ5OiBSZWJlY2NhIFBhbG1l ciA8cmViZWNjYV9wYWxtZXJAem9oby5jb20+IAoKLS0tIGEvZHJpdmVycy9ncHUvZHJtL2k5MTUv aTkxNV9nZW1fZXhlY2J1ZmZlci5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9pOTE1L2k5MTVfZ2Vt X2V4ZWNidWZmZXIuYwpAQCAtMTM5OCw3ICsxMzk4LDcgQEAgaTkxNV9nZW1fZG9fZXhlY2J1ZmZl cihzdHJ1Y3QgZHJtX2RldmljZQogewogCXN0cnVjdCBkcm1faTkxNV9wcml2YXRlICpkZXZfcHJp diA9IGRldi0+ZGV2X3ByaXZhdGU7CiAJc3RydWN0IGViX3ZtYXMgKmViOwotCXN0cnVjdCBkcm1f aTkxNV9nZW1fb2JqZWN0ICpiYXRjaF9vYmo7CisJc3RydWN0IGRybV9pOTE1X2dlbV9vYmplY3Qg KmJhdGNoX29iaiwgKm9yaWdfYmF0Y2hfb2JqOwogCXN0cnVjdCBkcm1faTkxNV9nZW1fZXhlY19v YmplY3QyIHNoYWRvd19leGVjX2VudHJ5OwogCXN0cnVjdCBpbnRlbF9lbmdpbmVfY3MgKnJpbmc7 CiAJc3RydWN0IGludGVsX2NvbnRleHQgKmN0eDsKQEAgLTE1MTEsNyArMTUxMSw3IEBAIGk5MTVf Z2VtX2RvX2V4ZWNidWZmZXIoc3RydWN0IGRybV9kZXZpY2UKIAkJZ290byBlcnI7CiAKIAkvKiB0 YWtlIG5vdGUgb2YgdGhlIGJhdGNoIGJ1ZmZlciBiZWZvcmUgd2UgbWlnaHQgcmVvcmRlciB0aGUg bGlzdHMgKi8KLQliYXRjaF9vYmogPSBlYl9nZXRfYmF0Y2goZWIpOworCW9yaWdfYmF0Y2hfb2Jq ID0gZWJfZ2V0X2JhdGNoKGViKTsKIAogCS8qIE1vdmUgdGhlIG9iamVjdHMgZW4tbWFzc2UgaW50 byB0aGUgR1RULCBldmljdGluZyBpZiBuZWNlc3NhcnkuICovCiAJbmVlZF9yZWxvY3MgPSAoYXJn cy0+ZmxhZ3MgJiBJOTE1X0VYRUNfTk9fUkVMT0MpID09IDA7CkBAIC0xNTMzLDcgKzE1MzMsNyBA QCBpOTE1X2dlbV9kb19leGVjYnVmZmVyKHN0cnVjdCBkcm1fZGV2aWNlCiAJfQogCiAJLyogU2V0 IHRoZSBwZW5kaW5nIHJlYWQgZG9tYWlucyBmb3IgdGhlIGJhdGNoIGJ1ZmZlciB0byBDT01NQU5E ICovCi0JaWYgKGJhdGNoX29iai0+YmFzZS5wZW5kaW5nX3dyaXRlX2RvbWFpbikgeworCWlmIChv cmlnX2JhdGNoX29iai0+YmFzZS5wZW5kaW5nX3dyaXRlX2RvbWFpbikgewogCQlEUk1fREVCVUco IkF0dGVtcHRpbmcgdG8gdXNlIHNlbGYtbW9kaWZ5aW5nIGJhdGNoIGJ1ZmZlclxuIik7CiAJCXJl dCA9IC1FSU5WQUw7CiAJCWdvdG8gZXJyOwpAQCAtMTU0Myw3ICsxNTQzLDcgQEAgaTkxNV9nZW1f ZG9fZXhlY2J1ZmZlcihzdHJ1Y3QgZHJtX2RldmljZQogCQliYXRjaF9vYmogPSBpOTE1X2dlbV9l eGVjYnVmZmVyX3BhcnNlKHJpbmcsCiAJCQkJCQkgICAgICAmc2hhZG93X2V4ZWNfZW50cnksCiAJ CQkJCQkgICAgICBlYiwKLQkJCQkJCSAgICAgIGJhdGNoX29iaiwKKwkJCQkJCSAgICAgIG9yaWdf YmF0Y2hfb2JqLAogCQkJCQkJICAgICAgYXJncy0+YmF0Y2hfc3RhcnRfb2Zmc2V0LAogCQkJCQkJ ICAgICAgYXJncy0+YmF0Y2hfbGVuLAogCQkJCQkJICAgICAgZmlsZS0+aXNfbWFzdGVyKTsKQEAg LTE1NTksNyArMTU1OSw3IEBAIGk5MTVfZ2VtX2RvX2V4ZWNidWZmZXIoc3RydWN0IGRybV9kZXZp Y2UKIAkJICogZG9uJ3Qgd2FudCB0aGF0IHNldCB3aGVuIHRoZSBjb21tYW5kIHBhcnNlciBpcwog CQkgKiBlbmFibGVkLgogCQkgKi8KLQkJaWYgKFVTRVNfUFBHVFQoZGV2KSkKKwkJaWYgKFVTRVNf UFBHVFQoZGV2KSAmJiBiYXRjaF9vYmohPW9yaWdfYmF0Y2hfb2JqKQogCQkJZGlzcGF0Y2hfZmxh Z3MgfD0gSTkxNV9ESVNQQVRDSF9TRUNVUkU7CiAKIAkJZXhlY19zdGFydCA9IDA7CgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpJbnRlbC1nZnggbWFpbGlu ZyBsaXN0CkludGVsLWdmeEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cDovL2xpc3RzLmZyZWVk ZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2ludGVsLWdmeAo=