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Load the SELinux policy after switch_root and remove the selinux-loadpolicy module #2652

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5 changes: 4 additions & 1 deletion modules.d/98selinux/selinux-loadpolicy.sh
Original file line number Diff line number Diff line change
@@ -1,6 +1,9 @@
#!/bin/sh

# FIXME: load selinux policy. this should really be done after we switchroot
# SELinux policy load should be done after switch_root.
#
# This module is therefore obsolete and it is left here only
# for backwards compatibility.

rd_load_policy() {
# If SELinux is disabled exit now
Expand Down
61 changes: 61 additions & 0 deletions modules.d/99base/init.sh
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
# Copyright 2008-2010, Red Hat, Inc.
# Harald Hoyer <[email protected]>
# Jeremy Katz <[email protected]>
# Copyright 2024 Guido Trentalancia <[email protected]>

export -p > /tmp/export.orig

Expand Down Expand Up @@ -397,3 +398,63 @@ else
emergency_shell
}
fi

# If SELinux is disabled exit now
getarg "selinux=0" > /dev/null && return 0

SELINUX="enforcing"
# shellcheck disable=SC1090
[ -e "/etc/selinux/config" ] && . "/etc/selinux/config"

# Check whether SELinux is in permissive mode
permissive=0

if getarg "enforcing=0" > /dev/null || [ "$SELINUX" = "permissive" ]; then
permissive=1
fi

# Finally load the SELinux policy and perform relabeling if needed
if [ -x "/sbin/load_policy" ] || [ -x "/usr/sbin/load_policy" ]; then
local ret=0
local out
info "Loading SELinux policy"

if [ -x "/sbin/load_policy" ]; then
out=$(LANG=C /sbin/load_policy -i 2>&1)
ret=$?
info "$out"
else
out=$(LANG=C /usr/sbin/load_policy -i 2>&1)
ret=$?
info "$out"
fi
umount /sys/fs/selinux

if [ "$SELINUX" = "disabled" ]; then
return 0
fi

if [ $ret -eq 0 ] || [ $ret -eq 2 ]; then
# If machine requires a relabel, force to permissive mode
[ -e "/.autorelabel" ] && LANG=C /usr/sbin/setenforce 0
mount --rbind /dev "/dev"
LANG=C /sbin/restorecon -R /dev
umount -R "/dev"
return 0
fi

warn "Initial SELinux policy load failed."
if [ $ret -eq 3 ] || [ $permissive -eq 0 ]; then
warn "Machine in enforcing mode."
warn "Not continuing"
emergency_shell -n selinux
exit 1
fi
return 0
elif [ $permissive -eq 0 ] && [ "$SELINUX" != "disabled" ]; then
warn "Machine in enforcing mode and cannot execute load_policy."
warn "To disable selinux, add selinux=0 to the kernel command line."
warn "Not continuing"
emergency_shell -n selinux
exit 1
fi