On Fri, Dec 04, 2015 at 05:43:49PM -0600, Serge E. Hallyn wrote: > On Fri, Dec 04, 2015 at 06:11:52PM -0500, Theodore Ts'o wrote: > > On Fri, Dec 04, 2015 at 02:45:32PM -0600, Seth Forshee wrote: > > > On Fri, Dec 04, 2015 at 02:07:36PM -0600, Serge E. Hallyn wrote: > > > > Heh, I was looking over http://www.gossamer-threads.com/lists/linux/kernel/103611 > > > > a little while ago :) The same question was asked 16 years ago. Apparently > > > > the answer then was that it was easier than fixing the code. > > > > > > So it seems then that either it still isn't safe and so unprivileged > > > users shouldn't be allowed to do it at all, or else it's safe and we > > > should drop the requirement completely. I can't say which is right, > > > unfortunately. > > > > It may not have been safe 16 years agoo, but giving invalid arguments > > to FIBMAP is safe for ext4 and ext2. This is the sort of thing that > > tools like trinity should and does test for, so I think it should be > > fine to remove the root check for FIBMAP. > > Seth, can I tempt you into sending a standalone patch to remove that? :) Patch sent. I'll drop this patch in v2. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
