On Tue, Oct 31, 2017 at 06:46:32PM -0500, Eric W. Biederman wrote: > > Christian I have looked through your code and I have found one real > issue and of things I want to twak
Cool, thanks for taking a close look Eric. > > The real issue is reading nr_extents multiple times when reading a map. > That can introduce races that will allow walking past the end of the > array, if the first read is 0 but the second read is > 5. > > I have also found a couple of tweaks that look like they are worth > implementing. Yeah, I saw that you unified some of the functions. I was thinking about this but wanted to keep the cases distinct even with some amount of code duplication. But it seems very much worth it from a maintenance perspective. Thanks! > > As all of these are very small and very straight forward I have > tested these and applied them all to my for-next branch Thanks for the fixes Eric. Really appreciated. If you're too swamped for stuff like that I'm obviously happy to do such trivial fixes myself. :) Christian > > > Eric W. Biederman (5): > userns: Don't special case a count of 0 > userns: Simplify the user and group mapping functions > userns: Don't read extents twice in m_start > userns: Make map_id_down a wrapper for map_id_range_down > userns: Simplify insert_extent > > kernel/user_namespace.c | 159 > ++++++++++++++++-------------------------------- > 1 file changed, 51 insertions(+), 108 deletions(-) > > > >