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[69.42.5.101]) by smtp.gmail.com with ESMTPSA id v18sm15512887pgb.23.2018.03.30.15.18.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 30 Mar 2018 15:18:09 -0700 (PDT) From: Rosen Penev To: lede-dev@lists.infradead.org Date: Fri, 30 Mar 2018 15:18:03 -0700 Message-Id: <20180330221804.29241-2-rosenp@gmail.com> X-Mailer: git-send-email 2.16.3 In-Reply-To: <20180330221804.29241-1-rosenp@gmail.com> References: <20180330221804.29241-1-rosenp@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180330_151820_791735_80DDB24E X-CRM114-Status: GOOD ( 10.11 ) X-Spam-Score: -0.1 (/) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:400e:c05:0:0:0:242 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rosenp[at]gmail.com) -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid Subject: [LEDE-DEV] [PATCH 2/3] sysctl: Restrict kernel pointer access from normal users. X-BeenThere: lede-dev@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rosen Penev MIME-Version: 1.0 Sender: "Lede-dev" Errors-To: lede-dev-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org The only downside to this is that it breaks perf with non-root users. I don't think this is an issue in OpenWrt. Signed-off-by: Rosen Penev --- package/base-files/files/etc/sysctl.conf | 3 +++ 1 file changed, 3 insertions(+) diff --git a/package/base-files/files/etc/sysctl.conf b/package/base-files/files/etc/sysctl.conf index ddc7a9bf69..61a43057a1 100644 --- a/package/base-files/files/etc/sysctl.conf +++ b/package/base-files/files/etc/sysctl.conf @@ -2,6 +2,9 @@ kernel.panic=3 kernel.core_pattern=/tmp/%e.%t.%p.%s.core fs.suid_dumpable=2 +#disable kernel pointer access from normal users +kernel.kptr_restrict=1 + net.ipv4.conf.default.arp_ignore=1 net.ipv4.conf.all.arp_ignore=1 net.ipv4.ip_forward=1