Ever wondered what was so bad about NULL pointer exceptions? An MIT Linux kernel programmer explains how to turn any NULL pointer into a root exploit on Linux. (There was also a previous installment about virtual memory and how to make NULL pointers benign.)
http://blog.ksplice.com/2010/03/null-pointers-part-i/
http://blog.ksplice.com/2010/04/exploit ... eferences/