Comment 33 for bug 524366

Richard, thanks for testing. BTW: Instead of your steps 1-3, you can directly download the branch with
bzr branch lp:~marcelstimberg/ubuntu/lucid/gzip/gzip-fix-524366

I do not think zlib is affected, though. I had a quick glance at the code and it does not seem to use memcpy from libc6 but an unoptimized zmemcpy function. The problem in gzip only surfaced because optimziations in libc6 made use of the two memory ranges not overlapping which gzip did not properly check for.