Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
30 lines (22 sloc) 973 Bytes
NULLDEREF -- A module for playing with kernel NULL pointer dereferences
This module should build against any remotely recent 2.6 kernel. To
build, you'll need the kernel headers for your kernel installed. On
Debian or Ubuntu, try:
# apt-get install linux-headers-$(uname -r)
on Fedora, try:
# yum install kernel-devel
Once you've got those, just run 'make' to produce a 'nullderef.ko'
nullderef uses sysfs to export its hooks. Simply
# insmod nullderef.ko
You shuld now have a /sys/module/nullderef/parameters/ directory,
containing two files, "read", and "call".
Reading from either of these files will result in a NULL pointer
dereference in the kernel. "read" will simply try to read a NULL
pointer. "call" will read a function pointer from the NULL address,
and then attempt to call through the resulting pointer.
Once you're done crashing your kernel, if your machine is still
stable, you can remove the module using:
# rmmod nullderef
Something went wrong with that request. Please try again.