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[77.8.188.137]) by smtp.gmail.com with ESMTPSA id z9-20020a1709064e0900b009886aaeb722sm496540eju.137.2023.07.20.03.35.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Jul 2023 03:35:59 -0700 (PDT) From: =?utf-8?q?Christian_G=C3=B6ttsche?= To: selinux@vger.kernel.org Cc: Paul Moore , Stephen Smalley , Eric Paris , linux-kernel@vger.kernel.org Subject: [RFC PATCH] selinux: log about VM being executable by default Date: Thu, 20 Jul 2023 12:35:49 +0200 Message-Id: <20230720103549.25255-1-cgzones@googlemail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1771937968409481270 X-GMAIL-MSGID: 1771937968409481270 In case virtual memory is being marked as executable by default, SELinux checks regarding explicit potential dangerous use are disabled. Inform the user about it. Signed-off-by: Christian Göttsche --- security/selinux/hooks.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 6f53fa71fbdb..3a7ece84c2cc 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -7265,6 +7265,8 @@ static __init int selinux_init(void) cred_init_security(); default_noexec = !(VM_DATA_DEFAULT_FLAGS & VM_EXEC); + if (!default_noexec) + pr_notice("SELinux: virtual memory is executable by default - related checks disabled\n"); avc_init();