kernel/mod-denylist.sh

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#! /bin/bash
# shellcheck disable=SC2164
rpm_buildroot="$1"
module_dir="$2"
module_list="$3"
blacklist_conf_files="$(mktemp)"
blacklist()
{
mkdir -p "$rpm_buildroot/etc/modprobe.d/"
cat > "$rpm_buildroot/etc/modprobe.d/$1-blacklist.conf" <<-__EOF__
# This kernel module can be automatically loaded by non-root users. To
# enhance system security, the module is blacklisted by default to ensure
# system administrators make the module available for use as needed.
# See https://access.redhat.com/articles/3760101 for more details.
#
# Remove the blacklist by adding a comment # at the start of the line.
blacklist $1
__EOF__
echo "%config(noreplace) /etc/modprobe.d/$1-blacklist.conf" >> "$blacklist_conf_files"
}
check_blacklist()
{
mod="$rpm_buildroot/$1"
[ ! "$mod" ] && return 0
if modinfo "$mod" | grep -q '^alias:\s\+net-'; then
mod="${1##*/}"
mod="${mod%.ko*}"
echo "$mod has an alias that allows auto-loading. Blacklisting."
blacklist "$mod"
fi
}
foreachp()
{
P=$(nproc)
bgcount=0
while read -r mod; do
$1 "$mod" &
bgcount=$((bgcount + 1))
if [ $bgcount -eq "$P" ]; then
wait -n
bgcount=$((bgcount - 1))
fi
done
wait
}
# Many BIOS-es export a PNP-id which causes the floppy driver to autoload
# even though most modern systems don't have a 3.5" floppy driver anymore
# this replaces the old die_floppy_die.patch which removed the PNP-id from
# the module
floppylist=("$rpm_buildroot"/"$module_dir"/kernel/drivers/block/floppy.ko*)
if [[ -n ${floppylist[0]} && -f ${floppylist[0]} ]]; then
blacklist "floppy"
fi
foreachp check_blacklist < "$module_list"
cat "$blacklist_conf_files" >> "$module_list"
rm -f "$blacklist_conf_files"