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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: [Xen-devel] [PATCH 5/9] x86/HVM: refuse CR3 loads with reserved (upper) bits set X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: George Dunlap , Andrew Cooper , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" V2hpbGUgYml0cyAxMSBhbmQgYmVsb3cgYXJlLCBpZiBub3QgdXNlZCBmb3Igb3RoZXIgcHVycG9z ZXMsIHJlc2VydmVkCmJ1dCBpZ25vcmVkLCBiaXRzIGJleW9uZCBwaHlzaWNhbCBhZGRyZXNzIHdp ZHRoIGFyZSBzdXBwb3NlZCB0byByYWlzZQpleGNlcHRpb25zIChhdCBsZWFzdCBpbiB0aGUgbm9u LW5lc3RlZCBjYXNlOyBJJ20gbm90IGNvbnZpbmNlZCB0aGUKY3VycmVudCBuZXN0ZWQgU1ZNL1ZN WCBiZWhhdmlvciBvZiByYWlzaW5nICNHUCgwKSBoZXJlIGlzIGNvcnJlY3QsIGJ1dAp0aGF0J3Mg bm90IHRoZSBzdWJqZWN0IG9mIHRoaXMgY2hhbmdlKS4KCkludHJvZHVjZSBjdXJyZCBhcyBhIGxv Y2FsIHZhcmlhYmxlLCBhbmQgcmVwbGFjZSBvdGhlciB2LT5kb21haW4KaW5zdGFuY2VzIGF0IHRo ZSBzYW1lIHRpbWUuCgpTaWduZWQtb2ZmLWJ5OiBKYW4gQmV1bGljaCA8amJldWxpY2hAc3VzZS5j b20+CgotLS0gYS94ZW4vYXJjaC94ODYvaHZtL2h2bS5jCisrKyBiL3hlbi9hcmNoL3g4Ni9odm0v aHZtLmMKQEAgLTEwMDQsNiArMTAwNCwxMyBAQCBzdGF0aWMgaW50IGh2bV9sb2FkX2NwdV9jdHh0 KHN0cnVjdCBkb21hCiAgICAgICAgIHJldHVybiAtRUlOVkFMOwogICAgIH0KIAorICAgIGlmICgg Y3R4dC5jcjMgJiB+KCgxVUwgPDwgZC0+YXJjaC5jcHVpZC0+ZXh0ZC5tYXhwaHlzYWRkcikgLSAx KSApCisgICAgeworICAgICAgICBwcmludGsoWEVOTE9HX0dfRVJSICJIVk0lZCByZXN0b3JlOiBi YWQgQ1IzICUjIiBQUkl4NjQgIlxuIiwKKyAgICAgICAgICAgICAgIGQtPmRvbWFpbl9pZCwgY3R4 dC5jcjMpOworICAgICAgICByZXR1cm4gWDg2RU1VTF9FWENFUFRJT047CisgICAgfQorCiAgICAg aWYgKCAoY3R4dC5mbGFncyAmIH5YRU5fWDg2X0ZQVV9JTklUSUFMSVNFRCkgIT0gMCApCiAgICAg ewogICAgICAgICBncHJpbnRrKFhFTkxPR19FUlIsICJiYWQgZmxhZ3MgdmFsdWUgaW4gQ1BVIGNv bnRleHQ6ICUjeFxuIiwKQEAgLTIyOTAsMTAgKzIyOTcsMTkgQEAgaW50IGh2bV9zZXRfY3IwKHVu c2lnbmVkIGxvbmcgdmFsdWUsIGJvbwogaW50IGh2bV9zZXRfY3IzKHVuc2lnbmVkIGxvbmcgdmFs dWUsIGJvb2wgbm9mbHVzaCwgYm9vbCBtYXlfZGVmZXIpCiB7CiAgICAgc3RydWN0IHZjcHUgKnYg PSBjdXJyZW50OworICAgIHN0cnVjdCBkb21haW4gKmN1cnJkID0gdi0+ZG9tYWluOwogICAgIHN0 cnVjdCBwYWdlX2luZm8gKnBhZ2U7CiAgICAgdW5zaWduZWQgbG9uZyBvbGQgPSB2LT5hcmNoLmh2 bS5ndWVzdF9jclszXTsKIAotICAgIGlmICggbWF5X2RlZmVyICYmIHVubGlrZWx5KHYtPmRvbWFp bi0+YXJjaC5tb25pdG9yLndyaXRlX2N0cmxyZWdfZW5hYmxlZCAmCisgICAgaWYgKCB2YWx1ZSAm IH4oKDFVTCA8PCBjdXJyZC0+YXJjaC5jcHVpZC0+ZXh0ZC5tYXhwaHlzYWRkcikgLSAxKSApCisg ICAgeworICAgICAgICBIVk1fREJHX0xPRyhEQkdfTEVWRUxfMSwKKyAgICAgICAgICAgICAgICAg ICAgIkF0dGVtcHQgdG8gc2V0IHJlc2VydmVkIENSMyBiaXQocyk6ICVseCIsCisgICAgICAgICAg ICAgICAgICAgIHZhbHVlKTsKKyAgICAgICAgcmV0dXJuIFg4NkVNVUxfRVhDRVBUSU9OOworICAg IH0KKworICAgIGlmICggbWF5X2RlZmVyICYmIHVubGlrZWx5KGN1cnJkLT5hcmNoLm1vbml0b3Iu d3JpdGVfY3RybHJlZ19lbmFibGVkICYKICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBt b25pdG9yX2N0cmxyZWdfYml0bWFzayhWTV9FVkVOVF9YODZfQ1IzKSkgKQogICAgIHsKICAgICAg ICAgQVNTRVJUKHYtPmFyY2gudm1fZXZlbnQpOwpAQCAtMjMwOSwxMyArMjMyNSwxMiBAQCBpbnQg aHZtX3NldF9jcjModW5zaWduZWQgbG9uZyB2YWx1ZSwgYm9vCiAgICAgICAgIH0KICAgICB9CiAK LSAgICBpZiAoIGh2bV9wYWdpbmdfZW5hYmxlZCh2KSAmJiAhcGFnaW5nX21vZGVfaGFwKHYtPmRv bWFpbikgJiYKKyAgICBpZiAoIGh2bV9wYWdpbmdfZW5hYmxlZCh2KSAmJiAhcGFnaW5nX21vZGVf aGFwKGN1cnJkKSAmJgogICAgICAgICAgKHZhbHVlICE9IHYtPmFyY2guaHZtLmd1ZXN0X2NyWzNd KSApCiAgICAgewogICAgICAgICAvKiBTaGFkb3ctbW9kZSBDUjMgY2hhbmdlLiBDaGVjayBQREJS IGFuZCB1cGRhdGUgcmVmY291bnRzLiAqLwogICAgICAgICBIVk1fREJHX0xPRyhEQkdfTEVWRUxf Vk1NVSwgIkNSMyB2YWx1ZSA9ICVseCIsIHZhbHVlKTsKLSAgICAgICAgcGFnZSA9IGdldF9wYWdl X2Zyb21fZ2ZuKHYtPmRvbWFpbiwgdmFsdWUgPj4gUEFHRV9TSElGVCwKLSAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgIE5VTEwsIFAyTV9BTExPQyk7CisgICAgICAgIHBhZ2UgPSBnZXRf cGFnZV9mcm9tX2dmbihjdXJyZCwgdmFsdWUgPj4gUEFHRV9TSElGVCwgTlVMTCwgUDJNX0FMTE9D KTsKICAgICAgICAgaWYgKCAhcGFnZSApCiAgICAgICAgICAgICBnb3RvIGJhZF9jcjM7CiAKQEAg LTIzMzEsNyArMjM0Niw3IEBAIGludCBodm1fc2V0X2NyMyh1bnNpZ25lZCBsb25nIHZhbHVlLCBi b28KIAogIGJhZF9jcjM6CiAgICAgZ2RwcmludGsoWEVOTE9HX0VSUiwgIkludmFsaWQgQ1IzXG4i KTsKLSAgICBkb21haW5fY3Jhc2godi0+ZG9tYWluKTsKKyAgICBkb21haW5fY3Jhc2goY3VycmQp OwogICAgIHJldHVybiBYODZFTVVMX1VOSEFORExFQUJMRTsKIH0KIAoKCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QK WGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5v cmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=