!1497 设置kptr_restrict和dmesg_restrict，避免内核地址泄露

Merge pull request !1497 from Hongjin Li/dev

services/etc/init.cfg

@@ -8,6 +8,8 @@
             "name" : "pre-init",
             "cmds" : [
                 "write /proc/sys/kernel/sysrq 0",
+                "write /proc/sys/kernel/dmesg_restrict 1",
+                "write /proc/sys/kernel/kptr_restrict 1",
                 "start ueventd",
                 "start watchdog_service",
                 "mkdir /data",