From 77d7a0338ceecd3aa08f51f615cb22e3687b4c7e Mon Sep 17 00:00:00 2001 From: Daniel Micay Date: Wed, 28 Jun 2017 07:54:49 -0400 Subject: [PATCH] Harden mounts Change-Id: I46e3fc4ac896a509ab8ca90ae4ce09b820da434b --- init/init.cpp | 6 +++--- rootdir/init.rc | 1 + 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/init/init.cpp b/init/init.cpp index 7a370596e..35bf44a7b 100755 --- a/init/init.cpp +++ b/init/init.cpp @@ -579,10 +579,10 @@ int main(int argc, char** argv) { mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"); mkdir("/dev/pts", 0755); mkdir("/dev/socket", 0755); - mount("devpts", "/dev/pts", "devpts", 0, NULL); + mount("devpts", "/dev/pts", "devpts", MS_NOSUID|MS_NOEXEC, NULL); #define MAKE_STR(x) __STRING(x) - mount("proc", "/proc", "proc", 0, "hidepid=2,gid=" MAKE_STR(AID_READPROC)); - mount("sysfs", "/sys", "sysfs", 0, NULL); + mount("proc", "/proc", "proc", MS_NOSUID|MS_NODEV|MS_NOEXEC, "hidepid=2,gid=" MAKE_STR(AID_READPROC)); + mount("sysfs", "/sys", "sysfs", MS_NOSUID|MS_NODEV|MS_NOEXEC, NULL); } // We must have some place other than / to create the device nodes for diff --git a/rootdir/init.rc b/rootdir/init.rc index 31b4e3566..da2071b15 100644 --- a/rootdir/init.rc +++ b/rootdir/init.rc @@ -126,6 +126,7 @@ on init write /proc/sys/kernel/sched_child_runs_first 0 write /proc/sys/kernel/randomize_va_space 2 + write /proc/sys/kernel/dmesg_restrict 1 write /proc/sys/kernel/kptr_restrict 2 write /proc/sys/vm/mmap_min_addr 32768 write /proc/sys/net/ipv4/ping_group_range "0 2147483647" -- 2.13.2