The MDP example no longer works on modern systems.
Add support for devtmpfs. This is required by login programs to relabel terminals.
Compile the policy with deny_unknown allow status to anticipate user space object managers in core components such as systemd.
Add default seusers mapping and failsafe context for the SELinux PAM module.
V2:
Fix existing file test for setfiles.
Add a file test for checkpolicy similar to the test for setfiles for consistency.
Execute setfiles with -F to ensure that customizables are relabeled as well in scenarios where filesystems are labeled but where SELinux is disabled.
Signed-off-by: Dominick Grift <dominick.grift@xxxxxxxxxxx>
---
scripts/selinux/install_policy.sh | 21 ++++++++++++++++-----
scripts/selinux/mdp/mdp.c | 1 +
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/scripts/selinux/install_policy.sh b/scripts/selinux/install_policy.sh
index 0b86c47baf7d..c993178e6ee7 100755
--- a/scripts/selinux/install_policy.sh
+++ b/scripts/selinux/install_policy.sh
@@ -6,7 +6,7 @@ if [ `id -u` -ne 0 ]; then
fi
SF=`which setfiles`
if [ $? -eq 1 ]; then
- if [ -f /sbin/setfiles ]; then
+ if [ -f /usr/setfiles ]; then
SF="/usr/setfiles"
else
echo "no selinux tools installed: setfiles"
@@ -17,14 +17,25 @@ fi
cd mdp
CP=`which checkpolicy`
+if [ $? -eq 1 ]; then
+ if [ -f /usr/checkpolicy ]; then
+ SF="/usr/checkpolicy"
+ else
+ echo "no selinux tools installed: checkpolicy"
+ exit 1
+ fi
+fi
VERS=`$CP -V | awk '{print $1}'`
./mdp policy.conf file_contexts
-$CP -o policy.$VERS policy.conf
+$CP -U allow -o policy.$VERS policy.conf
mkdir -p /etc/selinux/dummy/policy
mkdir -p /etc/selinux/dummy/contexts/files
+echo "__default__:user_u" > /etc/selinux/dummy/seusers
+echo "base_r:base_t" > /etc/selinux/dummy/contexts/failsafe_context
+
cp file_contexts /etc/selinux/dummy/contexts/files
cp dbus_contexts /etc/selinux/dummy/contexts
cp policy.$VERS /etc/selinux/dummy/policy
@@ -55,15 +66,15 @@ else
fi
cd /etc/selinux/dummy/contexts/files
-$SF file_contexts /
+$SF -F file_contexts /
mounts=`cat /proc/$$/mounts | egrep "ext2|ext3|xfs|jfs|ext4|ext4dev|gfs2" | awk '{ print $2 '}`
-$SF file_contexts $mounts
+$SF -F file_contexts $mounts
dodev=`cat /proc/$$/mounts | grep "/dev "`
if [ "eq$dodev" != "eq" ]; then
mount --move /dev /mnt
- $SF file_contexts /dev
+ $SF -F file_contexts /dev
mount --move /mnt /dev
fi
diff --git a/scripts/selinux/mdp/mdp.c b/scripts/selinux/mdp/mdp.c
index 073fe7537f6c..cf06d5694cbc 100644
--- a/scripts/selinux/mdp/mdp.c
+++ b/scripts/selinux/mdp/mdp.c
@@ -131,6 +131,7 @@ int main(int argc, char *argv[])
fprintf(fout, "fs_use_trans mqueue user_u:base_r:base_t;\n");
fprintf(fout, "fs_use_trans devpts user_u:base_r:base_t;\n");
+ fprintf(fout, "fs_use_trans devtmpfs user_u:base_r:base_t;\n");
fprintf(fout, "fs_use_trans hugetlbfs user_u:base_r:base_t;\n");
fprintf(fout, "fs_use_trans tmpfs user_u:base_r:base_t;\n");
fprintf(fout, "fs_use_trans shm user_u:base_r:base_t;\n");
--
2.21.0.rc1
