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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id q19-20020aa78433000000b00562f6df42f1sm3188707pfn.152.2022.10.28.13.19.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Oct 2022 13:19:01 -0700 (PDT) Date: Fri, 28 Oct 2022 13:19:00 -0700 From: Kees Cook To: Joey Gouly Cc: Catalin Marinas , Andrew Morton , Lennart Poettering , Zbigniew =?utf-8?Q?J=C4=99drzejewski-Szmek?= , Alexander Viro , Szabolcs Nagy , Mark Brown , Jeremy Linton , Topi Miettinen , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-abi-devel@lists.sourceforge.net, nd@arm.com, shuah@kernel.org Subject: Re: [PATCH v1 2/2] kselftest: vm: add tests for memory-deny-write-execute Message-ID: <202210281316.C83D6B5649@keescook> References: <20221026150457.36957-1-joey.gouly@arm.com> <20221026150457.36957-3-joey.gouly@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221026150457.36957-3-joey.gouly@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221028_131904_155300_ACD85231 X-CRM114-Status: GOOD ( 13.87 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 26, 2022 at 04:04:57PM +0100, Joey Gouly wrote: > [...] > +# define PR_MDWE_FLAG_MMAP 1 > [...] > + // Enable MDWE and then run the tests again. > + ret = prctl(PR_SET_MDWE, PR_MDWE_FLAG_MMAP, 0, 0, 0); > + if (ret < 0) { > + ksft_print_msg("PR_SET_MDWE failed or unsupported!\n"); > + goto exit; > + } > + > + ret = prctl(PR_GET_MDWE, PR_MDWE_FLAG_MMAP, 0, 0, 0); > + if (ret == 0) > + ksft_exit_fail_msg("PR_GET_MDWE failed!"); This flag (PR_MDWE_FLAG_MMAP), while defined in uapi, wasn't actually being used in the proposed prctl() api. :) -- Kees Cook _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel