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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id m19sm362991otn.47.2020.02.10.11.30.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2020 11:30:58 -0800 (PST) From: Kees Cook To: Ingo Molnar Subject: [PATCH v3 2/7] x86/elf: Split READ_IMPLIES_EXEC from executable GNU_STACK Date: Mon, 10 Feb 2020 11:30:44 -0800 Message-Id: <20200210193049.64362-3-keescook@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200210193049.64362-1-keescook@chromium.org> References: <20200210193049.64362-1-keescook@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200210_113102_482018_9EE26685 X-CRM114-Status: GOOD ( 14.95 ) 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 , Will Deacon , linux-kernel@vger.kernel.org, Jason Gunthorpe , linux-kselftest@vger.kernel.org, kernel-hardening@lists.openwall.com, 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 VGhlIFJFQURfSU1QTElFU19FWEVDIHdvcmstYXJvdW5kIHdhcyBkZXNpZ25lZCBmb3Igb2xkIHRv b2xjaGFpbnMgdGhhdApsYWNrZWQgdGhlIEVMRiBQVF9HTlVfU1RBQ0sgbWFya2luZyB1bmRlciB0 aGUgYXNzdW1wdGlvbiB0aGF0IHRvb2xjaGFpbnMKdGhhdCBjb3VsZG4ndCBzcGVjaWZ5IGV4ZWN1 dGFibGUgcGVybWlzc2lvbiBmbGFncyBmb3IgdGhlIHN0YWNrIG1heSBub3QKa25vdyBob3cgdG8g ZG8gaXQgY29ycmVjdGx5IGZvciBhbnkgbWVtb3J5IHJlZ2lvbi4KClRoaXMgbG9naWMgaXMgc2Vu c2libGUgZm9yIGhhdmluZyBhbmNpZW50IGJpbmFyaWVzIGNvZXhpc3QgaW4gYSBzeXN0ZW0Kd2l0 aCBwb3NzaWJseSBOWCBtZW1vcnksIGJ1dCB3YXMgaW1wbGVtZW50ZWQgaW4gYSB3YXkgdGhhdCBl cXVhdGVkIGhhdmluZwphIFBUX0dOVV9TVEFDSyBtYXJrZWQgZXhlY3V0YWJsZSBhcyBiZWluZyBh cyAiYnJva2VuIiBhcyBsYWNraW5nIHRoZQpQVF9HTlVfU1RBQ0sgbWFya2luZyBlbnRpcmVseS4g VGhpbmdzIGxpa2UgdW5tYXJrZWQgYXNzZW1ibHkgYW5kIHN0YWNrCnRyYW1wb2xpbmVzIG1heSBj YXVzZSBQVF9HTlVfU1RBQ0sgdG8gbmVlZCBhbiBleGVjdXRhYmxlIGJpdCwgYnV0IHRoZXkKZG8g bm90IGltcGx5IGFsbCBtYXBwaW5ncyBtdXN0IGJlIGV4ZWN1dGFibGUuCgpUaGlzIGNvbmZ1c2lv biBoYXMgbGVkIHRvIHNpdHVhdGlvbnMgd2hlcmUgbW9kZXJuIHByb2dyYW1zIHdpdGggZXhwbGlj aXRseQptYXJrZWQgZXhlY3V0YWJsZSBzdGFjayBhcmUgZm9yY2VkIGludG8gdGhlIFJFQURfSU1Q TElFU19FWEVDIHN0YXRlIHdoZW4Kbm8gc3VjaCB0aGluZyBpcyBuZWVkZWQuIChBbmQgbGVhZHMg dG8gdW5leHBlY3RlZCBmYWlsdXJlcyB3aGVuIG1tYXAoKWluZwpyZWdpb25zIG9mIGRldmljZSBk cml2ZXIgbWVtb3J5IHRoYXQgd2lzaCB0byBkaXNhbGxvdyBWTV9FWEVDWzFdLikKCkluIGxvb2tp bmcgZm9yIG90aGVyIHJlYXNvbnMgZm9yIHRoZSBSRUFEX0lNUExJRVNfRVhFQyBiZWhhdmlvciwg SmFubgpIb3JuIG5vdGVkIHRoYXQgZ2xpYmMgdGhyZWFkIHN0YWNrcyBoYXZlIGFsd2F5cyBiZWVu IG1hcmtlZCBSV1ggKHVudGlsCjIwMDMgd2hlbiB0aGV5IHN0YXJ0ZWQgdHJhY2tpbmcgdGhlIFBU X0dOVV9TVEFDSyBmbGFnIGluc3RlYWRbMl0pLiBBbmQKbXVzbCBkb2Vzbid0IHN1cHBvcnQgZXhl Y3V0YWJsZSBzdGFja3MgYXQgYWxsWzNdLiBBcyBzdWNoLCBubyBicmVha2FnZQpmb3IgbXVsdGl0 aHJlYWRlZCBhcHBsaWNhdGlvbnMgaXMgZXhwZWN0ZWQgZnJvbSB0aGlzIGNoYW5nZS4KClsxXSBo dHRwczovL2xrbWwua2VybmVsLm9yZy9yLzIwMTkwNDE4MDU1NzU5LkdBMzE1NUBtZWxsYW5veC5j b20KWzJdIGh0dHBzOi8vc291cmNld2FyZS5vcmcvZ2l0Lz9wPWdsaWJjLmdpdDthPWNvbW1pdGRp ZmY7aD01NGVlMTRiMzg4MgpbM10gaHR0cHM6Ly9sa21sLmtlcm5lbC5vcmcvci8yMDE5MDQyMzE5 MjUzNC5HTjIzNTk5QGJyaWdodHJhaW4uYWVyaWZhbC5jeAoKU3VnZ2VzdGVkLWJ5OiBIZWN0b3Ig TWFyY28tR2lzYmVydCA8aGVjbWFyZ2lAdXB2LmVzPgpTaWduZWQtb2ZmLWJ5OiBLZWVzIENvb2sg PGtlZXNjb29rQGNocm9taXVtLm9yZz4KLS0tCiBhcmNoL3g4Ni9pbmNsdWRlL2FzbS9lbGYuaCB8 IDUgKysrLS0KIDEgZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDIgZGVsZXRpb25zKC0p CgpkaWZmIC0tZ2l0IGEvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmggYi9hcmNoL3g4Ni9pbmNs dWRlL2FzbS9lbGYuaAppbmRleCA3MzNmNjljMmIwNTMuLmE3MDM1MDY1Mzc3YyAxMDA2NDQKLS0t IGEvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmgKKysrIGIvYXJjaC94ODYvaW5jbHVkZS9hc20v ZWxmLmgKQEAgLTI4OCwxMiArMjg4LDEzIEBAIGV4dGVybiB1MzIgZWxmX2h3Y2FwMjsKICAqIEVM RjogwqAgwqAgwqAgwqAgwqAgwqAgwqB8IMKgIMKgIMKgIMKgIMKgIMKgfCDCoCDCoCDCoCDCoCDC oCDCoCDCoCDCoCDCoHwgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqB8CiAgKiAtLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tfC0tLS0tLS0tLS0tLS0tLS0tLXwtLS0tLS0tLS0tLS0tLS0tfAog ICogbWlzc2luZyBHTlVfU1RBQ0sgfCBleGVjLWFsbCDCoCB8IGV4ZWMtYWxsIMKgIMKgIMKgIMKg IHwgZXhlYy1hbGwgwqAgwqAgwqAgfAotICogR05VX1NUQUNLID09IFJXWCDCoHwgZXhlYy1hbGwg wqAgfCBleGVjLWFsbCDCoCDCoCDCoCDCoCB8IGV4ZWMtYWxsIMKgIMKgIMKgIHwKKyAqIEdOVV9T VEFDSyA9PSBSV1ggwqB8IGV4ZWMtc3RhY2sgfCBleGVjLXN0YWNrIMKgIMKgIMKgIHwgZXhlYy1z dGFjayDCoCDCoCB8CiAgKiBHTlVfU1RBQ0sgPT0gUlcgwqAgfCBleGVjLW5vbmUgwqB8IGV4ZWMt bm9uZSDCoCDCoCDCoCDCoHwgZXhlYy1ub25lIMKgIMKgIMKgfAogICoKICAqICBleGVjLWFsbCAg OiBhbGwgUFJPVF9SRUFEIHVzZXIgbWFwcGluZ3MgYXJlIGV4ZWN1dGFibGUsIGV4Y2VwdCB3aGVu CiAgKiAgICAgICAgICAgICAgYmFja2VkIGJ5IGZpbGVzIG9uIGEgbm9leGVjLWZpbGVzeXN0ZW0u CiAgKiAgZXhlYy1ub25lIDogb25seSBQUk9UX0VYRUMgdXNlciBtYXBwaW5ncyBhcmUgZXhlY3V0 YWJsZS4KKyAqICBleGVjLXN0YWNrOiBvbmx5IHRoZSBzdGFjayBhbmQgUFJPVF9FWEVDIHVzZXIg bWFwcGluZ3MgYXJlIGV4ZWN1dGFibGUuCiAgKgogICogICp0aGlzIGNvbHVtbiBoYXMgbm8gYXJj aGl0ZWN0dXJhbCBlZmZlY3Q6IE5YIG1hcmtpbmdzIGFyZSBpZ25vcmVkIGJ5CiAgKiAgIGhhcmR3 YXJlLCBidXQgbWF5IGhhdmUgYmVoYXZpb3JhbCBlZmZlY3RzIHdoZW4gIndhbnRzIFgiIGNvbGxp ZGVzIHdpdGgKQEAgLTMwMiw3ICszMDMsNyBAQCBleHRlcm4gdTMyIGVsZl9od2NhcDI7CiAgKgog ICovCiAjZGVmaW5lIGVsZl9yZWFkX2ltcGxpZXNfZXhlYyhleCwgZXhlY3V0YWJsZV9zdGFjaykJ XAotCShleGVjdXRhYmxlX3N0YWNrICE9IEVYU1RBQ0tfRElTQUJMRV9YKQorCShleGVjdXRhYmxl X3N0YWNrID09IEVYU1RBQ0tfREVGQVVMVCkKIAogc3RydWN0IHRhc2tfc3RydWN0OwogCi0tIAoy LjIwLjEKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwps aW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJh ZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51 eC1hcm0ta2VybmVsCg==