From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: [PATCH RFC 14/44] x86/mm: Added safety checks that pagetables aren't shared Date: Thu, 4 Jan 2018 20:21:39 +0000 Message-ID: <1515097329-31902-15-git-send-email-andrew.cooper3@citrix.com> References: <1515097329-31902-1-git-send-email-andrew.cooper3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1515097329-31902-1-git-send-email-andrew.cooper3@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Xen-devel Cc: Andrew Cooper List-Id: xen-devel@lists.xenproject.org U2lnbmVkLW9mZi1ieTogQW5kcmV3IENvb3BlciA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4K LS0tCiB4ZW4vYXJjaC94ODYvbW0uYyAgICAgICAgfCAxOSArKysrKysrKysrKysrKysrKystCiB4 ZW4vYXJjaC94ODYvc2V0dXAuYyAgICAgfCAgMSArCiB4ZW4vaW5jbHVkZS9hc20teDg2L21tLmgg fCAgNiArKysrKy0KIDMgZmlsZXMgY2hhbmdlZCwgMjQgaW5zZXJ0aW9ucygrKSwgMiBkZWxldGlv bnMoLSkKCmRpZmYgLS1naXQgYS94ZW4vYXJjaC94ODYvbW0uYyBiL3hlbi9hcmNoL3g4Ni9tbS5j CmluZGV4IDM3NTU2NWYuLmQ2Zjg4Y2EgMTAwNjQ0Ci0tLSBhL3hlbi9hcmNoL3g4Ni9tbS5jCisr KyBiL3hlbi9hcmNoL3g4Ni9tbS5jCkBAIC01MDUsMTggKzUwNSwzNSBAQCB2b2lkIGRvX3dyaXRl X3B0YmFzZShzdHJ1Y3QgdmNwdSAqdiwgYm9vbCB0bGJfbWFpbnRlbmFuY2UpCiAgICAgdW5zaWdu ZWQgbG9uZyBuZXdfY3IzOwogICAgIHVuc2lnbmVkIGludCBjcHUgPSBzbXBfcHJvY2Vzc29yX2lk KCk7CiAgICAgdW5zaWduZWQgbG9uZyAqdGhpc19jdXJyX3B0YmFzZSA9ICZwZXJfY3B1KGN1cnJf cHRiYXNlLCBjcHUpOworICAgIHN0cnVjdCBwYWdlX2luZm8gKm5ld19wZzsKIAogICAgIC8qIENo ZWNrIHRoYXQgJWNyMyBpc24ndCBiZWluZyBzaHVmZmxlZCB1bmRlciBvdXIgZmVldC4gKi8KICAg ICBBU1NFUlQoKnRoaXNfY3Vycl9wdGJhc2UgPT0gcmVhZF9jcjMoKSk7CiAKICAgICBuZXdfY3Iz ID0gcHRfbWF5YmVfc2hhZG93KHYpOworICAgIG5ld19wZyA9IG1hZGRyX3RvX3BhZ2UobmV3X2Ny Myk7CisKKyAgICAvKiBDaGVjayB0aGF0IG5ld19jcjMgaXNuJ3QgaW4gdXNlIGJ5IGEgZGlmZmVy ZW50IHBjcHUuICovCisgICAgaWYgKCBuZXdfY3IzICE9ICp0aGlzX2N1cnJfcHRiYXNlICkKKyAg ICAgICAgQlVHX09OKHRlc3RfYW5kX3NldF9iaXQoX1BHQ19pbnVzZV9wZ3RhYmxlLCAmbmV3X3Bn LT5jb3VudF9pbmZvKSk7CisgICAgZWxzZQorICAgICAgICAvKiBTYW1lIGNyMy4gIENoZWNrIHRo YXQgaXQgaXMgc3RpbGwgbWFya2VkIGFzIGluIHVzZS4gKi8KKyAgICAgICAgQVNTRVJUKHRlc3Rf Yml0KF9QR0NfaW51c2VfcGd0YWJsZSwgJm5ld19wZy0+Y291bnRfaW5mbykpOwogCiAgICAgaWYg KCB0bGJfbWFpbnRlbmFuY2UgKQogICAgICAgICB3cml0ZV9jcjMobmV3X2NyMyk7CiAgICAgZWxz ZQogICAgICAgICBhc20gdm9sYXRpbGUgKCAibW92ICUwLCAlJWNyMyIgOjogInIiIChuZXdfY3Iz KSA6ICJtZW1vcnkiICk7CiAKLSAgICAqdGhpc19jdXJyX3B0YmFzZSA9IG5ld19jcjM7CisgICAg LyogTWFyayB0aGUgb2xkIGNyMyBhcyBubyBsb25nZXIgaW4gdXNlLiAqLworICAgIGlmICggbmV3 X2NyMyAhPSAqdGhpc19jdXJyX3B0YmFzZSApCisgICAgeworICAgICAgICBzdHJ1Y3QgcGFnZV9p bmZvICpvbGRfcGcgPSBtYWRkcl90b19wYWdlKCp0aGlzX2N1cnJfcHRiYXNlKTsKKworICAgICAg ICBCVUdfT04oIXRlc3RfYW5kX2NsZWFyX2JpdChfUEdDX2ludXNlX3BndGFibGUsICZvbGRfcGct PmNvdW50X2luZm8pKTsKKworICAgICAgICAqdGhpc19jdXJyX3B0YmFzZSA9IG5ld19jcjM7Cisg ICAgfQogfQogCiAvKgpkaWZmIC0tZ2l0IGEveGVuL2FyY2gveDg2L3NldHVwLmMgYi94ZW4vYXJj aC94ODYvc2V0dXAuYwppbmRleCA3YTA1YTdjLi5mZmE3ZWE0IDEwMDY0NAotLS0gYS94ZW4vYXJj aC94ODYvc2V0dXAuYworKysgYi94ZW4vYXJjaC94ODYvc2V0dXAuYwpAQCAtMjQ2LDYgKzI0Niw3 IEBAIHZvaWQgZWFybHlfc3dpdGNoX3RvX2lkbGUodm9pZCkKICAgICBzZXRfY3VycmVudCh2KTsK ICAgICBwZXJfY3B1KGN1cnJfdmNwdSwgY3B1KSA9IHY7CiAKKyAgICBfX3NldF9iaXQoX1BHQ19p bnVzZV9wZ3RhYmxlLCAmbWFkZHJfdG9fcGFnZSh2LT5hcmNoLmNyMyktPmNvdW50X2luZm8pOwog ICAgIGFzbSB2b2xhdGlsZSAoICJtb3YgJVtucGdlXSwgJSVjcjQ7IgogICAgICAgICAgICAgICAg ICAgICJtb3YgJVtjcjNdLCAlJWNyMzsiCiAgICAgICAgICAgICAgICAgICAgIm1vdiAlW3BnZV0s ICUlY3I0OyIKZGlmZiAtLWdpdCBhL3hlbi9pbmNsdWRlL2FzbS14ODYvbW0uaCBiL3hlbi9pbmNs dWRlL2FzbS14ODYvbW0uaAppbmRleCBjZWI3ZGQ0Li42NDA0NGM2IDEwMDY0NAotLS0gYS94ZW4v aW5jbHVkZS9hc20teDg2L21tLmgKKysrIGIveGVuL2luY2x1ZGUvYXNtLXg4Ni9tbS5oCkBAIC0y NTgsOCArMjU4LDEyIEBAIHN0cnVjdCBwYWdlX2luZm8KICNkZWZpbmUgUEdDX3N0YXRlX2ZyZWUg ICAgUEdfbWFzaygzLCA5KQogI2RlZmluZSBwYWdlX3N0YXRlX2lzKHBnLCBzdCkgKCgocGcpLT5j b3VudF9pbmZvJlBHQ19zdGF0ZSkgPT0gUEdDX3N0YXRlXyMjc3QpCiAKKy8qIFBhZ2UgaXMgYSBy b290IHBhZ2V0YWJsZSwgd2l0aCBhIHBjcHVzICVjcjMgcG9pbnRpbmcgYXQgaXQuICovCisjZGVm aW5lIF9QR0NfaW51c2VfcGd0YWJsZSBQR19zaGlmdCgxMCkKKyNkZWZpbmUgUEdDX2ludXNlX3Bn dGFibGUgIFBHX21hc2soMSwgMTApCisKICAvKiBDb3VudCBvZiByZWZlcmVuY2VzIHRvIHRoaXMg ZnJhbWUuICovCi0jZGVmaW5lIFBHQ19jb3VudF93aWR0aCAgIFBHX3NoaWZ0KDkpCisjZGVmaW5l IFBHQ19jb3VudF93aWR0aCAgIFBHX3NoaWZ0KDEwKQogI2RlZmluZSBQR0NfY291bnRfbWFzayAg ICAoKDFVTDw8UEdDX2NvdW50X3dpZHRoKS0xKQogCiAvKgotLSAKMi4xLjQKCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBs aXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2pl Y3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs