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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id z13sm14462509pge.29.2020.02.24.21.13.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Feb 2020 21:13:11 -0800 (PST) From: Kees Cook To: Borislav Petkov Subject: [PATCH v4 3/6] x86/elf: Disable automatic READ_IMPLIES_EXEC for 64-bit address spaces Date: Mon, 24 Feb 2020 21:13:04 -0800 Message-Id: <20200225051307.6401-4-keescook@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200225051307.6401-1-keescook@chromium.org> References: <20200225051307.6401-1-keescook@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200224_211314_884170_AB11AA33 X-CRM114-Status: GOOD ( 11.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Jann Horn , Catalin Marinas , x86@kernel.org, Hector Marco-Gisbert , Russell King , linux-kernel@vger.kernel.org, Jason Gunthorpe , Jason Gunthorpe , kernel-hardening@lists.openwall.com, Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org V2l0aCBtb2Rlcm4geDg2IDY0LWJpdCBlbnZpcm9ubWVudHMsIHRoZXJlIHNob3VsZCBuZXZlciBi ZSBhIG5lZWQgZm9yCmF1dG9tYXRpYyBSRUFEX0lNUExJRVNfRVhFQywgYXMgdGhlIGFyY2hpdGVj dHVyZSBpcyBpbnRlbmRlZCB0byBhbHdheXMKYmUgZXhlY3V0ZS1iaXQgYXdhcmUgKGFzIGluLCB0 aGUgZGVmYXVsdCBtZW1vcnkgcHJvdGVjdGlvbiBzaG91bGQgYmUgTlgKdW5sZXNzIGEgcmVnaW9u IGV4cGxpY2l0bHkgcmVxdWVzdHMgdG8gYmUgZXhlY3V0YWJsZSkuCgpUaGVyZSB3ZXJlIHZlcnkg b2xkIHg4Nl82NCBzeXN0ZW1zIHRoYXQgbGFja2VkIHRoZSBOWCBiaXQsIGJ1dCBmb3IgdGhvc2Us CnRoZSBOWCBiaXQgaXMsIG9idmlvdXNseSwgdW5lbmZvcmNlYWJsZSwgc28gdGhlc2UgY2hhbmdl cyBzaG91bGQgaGF2ZQpubyBpbXBhY3Qgb24gdGhlbS4KClN1Z2dlc3RlZC1ieTogSGVjdG9yIE1h cmNvLUdpc2JlcnQgPGhlY21hcmdpQHVwdi5lcz4KU2lnbmVkLW9mZi1ieTogS2VlcyBDb29rIDxr ZWVzY29va0BjaHJvbWl1bS5vcmc+ClJldmlld2VkLWJ5OiBKYXNvbiBHdW50aG9ycGUgPGpnZ0Bt ZWxsYW5veC5jb20+Ci0tLQogYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmggfCA0ICsrLS0KIDEg ZmlsZSBjaGFuZ2VkLCAyIGluc2VydGlvbnMoKyksIDIgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0 IGEvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmggYi9hcmNoL3g4Ni9pbmNsdWRlL2FzbS9lbGYu aAppbmRleCBhNzAzNTA2NTM3N2MuLmM5YjdiZTBiY2FkMyAxMDA2NDQKLS0tIGEvYXJjaC94ODYv aW5jbHVkZS9hc20vZWxmLmgKKysrIGIvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmgKQEAgLTI4 Nyw3ICsyODcsNyBAQCBleHRlcm4gdTMyIGVsZl9od2NhcDI7CiAgKiDCoCDCoCDCoCDCoCDCoCDC oCDCoENQVTogfCBsYWNrcyBOWCogwqB8IGhhcyBOWCwgaWEzMiDCoCDCoCB8IGhhcyBOWCwgeDg2 XzY0IHwKICAqIEVMRjogwqAgwqAgwqAgwqAgwqAgwqAgwqB8IMKgIMKgIMKgIMKgIMKgIMKgfCDC oCDCoCDCoCDCoCDCoCDCoCDCoCDCoCDCoHwgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqB8CiAgKiAt LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tfC0tLS0tLS0tLS0tLS0tLS0tLXwtLS0tLS0t LS0tLS0tLS0tfAotICogbWlzc2luZyBHTlVfU1RBQ0sgfCBleGVjLWFsbCDCoCB8IGV4ZWMtYWxs IMKgIMKgIMKgIMKgIHwgZXhlYy1hbGwgwqAgwqAgwqAgfAorICogbWlzc2luZyBHTlVfU1RBQ0sg fCBleGVjLWFsbCDCoCB8IGV4ZWMtYWxsIMKgIMKgIMKgIMKgIHwgZXhlYy1ub25lwqAgwqAgwqAg fAogICogR05VX1NUQUNLID09IFJXWCDCoHwgZXhlYy1zdGFjayB8IGV4ZWMtc3RhY2sgwqAgwqAg wqAgfCBleGVjLXN0YWNrIMKgIMKgIHwKICAqIEdOVV9TVEFDSyA9PSBSVyDCoCB8IGV4ZWMtbm9u ZSDCoHwgZXhlYy1ub25lIMKgIMKgIMKgIMKgfCBleGVjLW5vbmUgwqAgwqAgwqB8CiAgKgpAQCAt MzAzLDcgKzMwMyw3IEBAIGV4dGVybiB1MzIgZWxmX2h3Y2FwMjsKICAqCiAgKi8KICNkZWZpbmUg ZWxmX3JlYWRfaW1wbGllc19leGVjKGV4LCBleGVjdXRhYmxlX3N0YWNrKQlcCi0JKGV4ZWN1dGFi bGVfc3RhY2sgPT0gRVhTVEFDS19ERUZBVUxUKQorCShtbWFwX2lzX2lhMzIoKSAmJiBleGVjdXRh YmxlX3N0YWNrID09IEVYU1RBQ0tfREVGQVVMVCkKIAogc3RydWN0IHRhc2tfc3RydWN0OwogCi0t IAoyLjIwLjEKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmlu ZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9s aW51eC1hcm0ta2VybmVsCg==