_Tons_ of computer systems courses are taught out of the same book from CMU: _Computer Systems: A Programmer's Perspective_.

You can search for "malloc lab" and find tons of copies of the assignment (with only the instructor names and course numbers changed), but here's one:

http://www.cs.cmu.edu/afs/cs/academic/class/15213-f02/L6/mal...

mine was http://www.owlnet.rice.edu/~comp320/2007/assignments/malloc/.... or something similar a handful of years prior.