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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id a18sm3314835pfr.109.2020.03.26.23.48.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Mar 2020 23:48:23 -0700 (PDT) From: Kees Cook To: Borislav Petkov Subject: [PATCH v5 2/6] x86/elf: Split READ_IMPLIES_EXEC from executable PT_GNU_STACK Date: Thu, 26 Mar 2020 23:48:16 -0700 Message-Id: <20200327064820.12602-3-keescook@chromium.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200327064820.12602-1-keescook@chromium.org> References: <20200327064820.12602-1-keescook@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200326_234828_573755_6643E13B X-CRM114-Status: GOOD ( 13.88 ) 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 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 PGtlZXNjb29rQGNocm9taXVtLm9yZz4KUmV2aWV3ZWQtYnk6IEphc29uIEd1bnRob3JwZSA8amdn QG1lbGxhbm94LmNvbT4KLS0tCiBhcmNoL3g4Ni9pbmNsdWRlL2FzbS9lbGYuaCB8IDUgKysrLS0K IDEgZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDIgZGVsZXRpb25zKC0pCgpkaWZmIC0t Z2l0IGEvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmggYi9hcmNoL3g4Ni9pbmNsdWRlL2FzbS9l bGYuaAppbmRleCBlZTQ1OWQ0YzNiNDUuLjM5N2ExYzc0NDMzZSAxMDA2NDQKLS0tIGEvYXJjaC94 ODYvaW5jbHVkZS9hc20vZWxmLmgKKysrIGIvYXJjaC94ODYvaW5jbHVkZS9hc20vZWxmLmgKQEAg LTI4OCwxMiArMjg4LDEzIEBAIGV4dGVybiB1MzIgZWxmX2h3Y2FwMjsKICAqIEVMRjogwqAgwqAg wqAgwqAgICAgwqAgwqAgwqB8IMKgIMKgIMKgIMKgIMKgIMKgfCDCoCDCoCDCoCDCoCDCoCDCoCDC oCDCoCDCoHwgwqAgwqAgwqAgwqAgwqAgwqAgwqAgwqB8CiAgKiAtLS0tLS0tLS0tLS0tLS0tLS0t LS18LS0tLS0tLS0tLS0tfC0tLS0tLS0tLS0tLS0tLS0tLXwtLS0tLS0tLS0tLS0tLS0tfAogICog bWlzc2luZyBQVF9HTlVfU1RBQ0sgfCBleGVjLWFsbCDCoCB8IGV4ZWMtYWxsIMKgIMKgIMKgIMKg IHwgZXhlYy1hbGwgwqAgwqAgwqAgfAotICogUFRfR05VX1NUQUNLID09IFJXWCDCoHwgZXhlYy1h bGwgwqAgfCBleGVjLWFsbCDCoCDCoCDCoCDCoCB8IGV4ZWMtYWxsIMKgIMKgIMKgIHwKKyAqIFBU X0dOVV9TVEFDSyA9PSBSV1ggwqB8IGV4ZWMtc3RhY2sgfCBleGVjLXN0YWNrIMKgIMKgIMKgIHwg ZXhlYy1zdGFjayDCoCDCoCB8CiAgKiBQVF9HTlVfU1RBQ0sgPT0gUlcgwqAgfCBleGVjLW5vbmUg wqB8IGV4ZWMtbm9uZSDCoCDCoCDCoCDCoHwgZXhlYy1ub25lIMKgIMKgIMKgfAogICoKICAqICBl eGVjLWFsbCAgOiBhbGwgUFJPVF9SRUFEIHVzZXIgbWFwcGluZ3MgYXJlIGV4ZWN1dGFibGUsIGV4 Y2VwdCB3aGVuCiAgKiAgICAgICAgICAgICAgYmFja2VkIGJ5IGZpbGVzIG9uIGEgbm9leGVjLWZp bGVzeXN0ZW0uCiAgKiAgZXhlYy1ub25lIDogb25seSBQUk9UX0VYRUMgdXNlciBtYXBwaW5ncyBh cmUgZXhlY3V0YWJsZS4KKyAqICBleGVjLXN0YWNrOiBvbmx5IHRoZSBzdGFjayBhbmQgUFJPVF9F WEVDIHVzZXIgbWFwcGluZ3MgYXJlIGV4ZWN1dGFibGUuCiAgKgogICogICp0aGlzIGNvbHVtbiBo YXMgbm8gYXJjaGl0ZWN0dXJhbCBlZmZlY3Q6IE5YIG1hcmtpbmdzIGFyZSBpZ25vcmVkIGJ5CiAg KiAgIGhhcmR3YXJlLCBidXQgbWF5IGhhdmUgYmVoYXZpb3JhbCBlZmZlY3RzIHdoZW4gIndhbnRz IFgiIGNvbGxpZGVzIHdpdGgKQEAgLTMwMiw3ICszMDMsNyBAQCBleHRlcm4gdTMyIGVsZl9od2Nh cDI7CiAgKgogICovCiAjZGVmaW5lIGVsZl9yZWFkX2ltcGxpZXNfZXhlYyhleCwgZXhlY3V0YWJs ZV9zdGFjaykJXAotCShleGVjdXRhYmxlX3N0YWNrICE9IEVYU1RBQ0tfRElTQUJMRV9YKQorCShl eGVjdXRhYmxlX3N0YWNrID09IEVYU1RBQ0tfREVGQVVMVCkKIAogc3RydWN0IHRhc2tfc3RydWN0 OwogCi0tIAoyLjIwLjEKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxp c3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0 aW5mby9saW51eC1hcm0ta2VybmVsCg==