A simple 5-minute checker which simulates OOM failures by returning NULL from malloc and friends.

This project is developed for Lalambda '21 school and is meant for educational purposes only.

BRANCHES IN THIS REPO MAY BE FORCED CHANGED AT ANY MOMENT.

To instrument programs need to either export LD_PRELOAD=path/to/libfailingmalloc.so or echo path/to/libfailingmalloc.so >> /etc/ld.so.preload.

Options are supplied through environment variables:

• FAILING_MALLOC_FAIL_AFTER - do not try to return NULL for first N calls
• FAILING_MALLOC_LOGFILE - dump logs to file (instead of stderr)

To fuzz an app run it in a loop:

$ while true; do export FAILING_MALLOC_FAIL_AFTER=$((`od -vAn -N1 -tu1 < /dev/urandom` >> 5)) LD_PRELOAD=path/to/libfailingmalloc.so myapp sleep 0.5 done