The full writeup is much more detailed and available here: http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/ http://crypto.junod.info/2012/12/13/hash-dos

The full writeup is much more detailed and available here: http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/ http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/ I submitted the lwn article because it gives a nice overview and most importantly Chris Mason (btrfs maintainer) discusses the issue in the comments.