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Tue, 12 Mar 2019 17:32:57 +0000 (UTC) From: Ali Saidi To: , , Subject: [PATCH 1/2] arm64/mmap: handle worst-case heap randomization in mmap_base Date: Tue, 12 Mar 2019 17:32:47 +0000 Message-ID: <20190312173248.13490-2-alisaidi@amazon.com> X-Mailer: git-send-email 2.15.3.AMZN In-Reply-To: <20190312173248.13490-1-alisaidi@amazon.com> References: <20190312173248.13490-1-alisaidi@amazon.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190312_103322_116413_B4571C4F X-CRM114-Status: GOOD ( 13.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , Peter Zijlstra , Catalin Marinas , Dave Hansen , Will Deacon , Ingo Molnar , Borislav Petkov , David Woodhouse , Andy Lutomirski , "H. Peter Anvin" , Andrew Morton , Thomas Gleixner , Ali Saidi , Anthony Liguori 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 SW5jcmVhc2UgbW1hcF9iYXNlIGJ5IHRoZSB3b3JzdC1jYXNlIGJyayByYW5kb21pemF0aW9uIHNv IHRoYXQKdGhlIHN0YWNrIGFuZCBoZWFwIHJlbWFpbiBhcGFydC4KCkluIExpbnV4IDQuMTMgYSBj aGFuZ2Ugd2FzIGNvbW1pdHRlZCB0aGF0IHNwZWNpYWwgY2FzZWQgdGhlIGtlcm5lbCBFTEYKbG9h ZGVyIHdoZW4gdGhlIGxvYWRlciBpcyBpbnZva2VkIGRpcmVjdGx5IChlYWIwOTUzMmQ0MDA7IGJp bmZtdF9lbGY6IHVzZQpFTEZfRVRfRFlOX0JBU0Ugb25seSBmb3IgUElFKS4gR2VuZXJhbGx5LCB0 aGUgbG9hZGVyIGlzbuKAmXQgaW52b2tlZApkaXJlY3RseSBhbmQgdGhpcyBpc3N1ZSBpcyBsaW1p dGVkIHRvIGNhc2VzIHdoZXJlIGl0IGlzLCAoZS5nIHRvIHNldCBhCm5vbi1pbmhlcml0YWJsZSBM RF9MSUJSQVJZX1BBVEgsIHRlc3RpbmcgbmV3IHZlcnNpb25zIG9mIHRoZSBsb2FkZXIpLiBJbgp0 aG9zZSByYXJlIGNhc2VzLCB0aGUgbG9hZGVyIGRvZXNuJ3QgdGFrZSBpbnRvIGFjY291bnQgdGhl IGFtb3VudCBvZiBicmsKcmFuZG9taXphdGlvbiB0aGF0IHdpbGwgYmUgYXBwbGllZCBieSBhcmNo X3JhbmRvbWl6ZV9icmsoKS4gVGhpcyBjYW4KbGVhZCB0byB0aGUgc3RhY2sgYW5kIGhlYXAgYmVp bmcgYXJiaXRyYXJpbHkgY2xvc2UgdG8gZWFjaCBvdGhlci4KClNpZ25lZC1vZmYtYnk6IEFsaSBT YWlkaSA8YWxpc2FpZGlAYW1hem9uLmNvbT4KCi0tLQogYXJjaC9hcm02NC9tbS9tbWFwLmMgfCA4 ICsrKysrKysrCiAxIGZpbGUgY2hhbmdlZCwgOCBpbnNlcnRpb25zKCspCgpkaWZmIC0tZ2l0IGEv YXJjaC9hcm02NC9tbS9tbWFwLmMgYi9hcmNoL2FybTY0L21tL21tYXAuYwppbmRleCA4NDJjOGE1 ZmNkNTMuLjA3NzhmN2JhODMwNiAxMDA2NDQKLS0tIGEvYXJjaC9hcm02NC9tbS9tbWFwLmMKKysr IGIvYXJjaC9hcm02NC9tbS9tbWFwLmMKQEAgLTY3LDYgKzY3LDE0IEBAIHN0YXRpYyB1bnNpZ25l ZCBsb25nIG1tYXBfYmFzZSh1bnNpZ25lZCBsb25nIHJuZCwgc3RydWN0IHJsaW1pdCAqcmxpbV9z dGFjaykKIAl1bnNpZ25lZCBsb25nIGdhcCA9IHJsaW1fc3RhY2stPnJsaW1fY3VyOwogCXVuc2ln bmVkIGxvbmcgcGFkID0gKFNUQUNLX1JORF9NQVNLIDw8IFBBR0VfU0hJRlQpICsgc3RhY2tfZ3Vh cmRfZ2FwOwogCisJLyogUHJvdmlkZSBzcGFjZSBmb3IgcmFuZG9taXphdGlvbiB3aGVuIHJhbmRv bWl6ZV92YV9zcGFjZSA9PSAyIGFuZAorCSAqIGxkLWxpbnV4LnNvIGlzIGNhbGxlZCBkaXJlY3Rs eS4gVmFsdWVzIGZyb20gYXJjaF9yYW5kb21pemVfYnJrKCkKKwkgKi8KKwlpZiAodGVzdF90aHJl YWRfZmxhZyhUSUZfMzJCSVQpKQorCQlwYWQgKz0gU1pfMzJNOworCWVsc2UKKwkJcGFkICs9IFNa XzFHOworCiAJLyogVmFsdWVzIGNsb3NlIHRvIFJMSU1fSU5GSU5JVFkgY2FuIG92ZXJmbG93LiAq LwogCWlmIChnYXAgKyBwYWQgPiBnYXApCiAJCWdhcCArPSBwYWQ7Ci0tIAoyLjE1LjMuQU1aTgoK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFy bS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1r ZXJuZWwK