On Fri, Sep 22, 2023 at 12:34 AM Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> wrote: > > * Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> [230921 19:27]: > > On Thu, 21 Sep 2023 20:23:11 +0100 Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > > > > > > It isn't clear what are the user-visible effects of this flaw? Please > > > > > send this along and I'll paste it in. > > > > > > > > > > > > User may notice that mas_prev() or mas_next() calls that result in going > > > > outside of the limit passed to the call will cause incorrect returns on > > > > subsequent calls using that maple state, such as mas_find() skipping an > > > > entry. > > > > > > When Andrew says "User visible" he means "userspace visible". Not > > > "in kernel user visible". What are the _consequences_. > > > > Thanks ;) > > > > We have a Link: > > (https://gist.github.com/heatd/85d2971fae1501b55b6ea401fbbe485b) but it > > takes us to the reproducer code. If it took us to Pedro's initial bug > > report then the sun would shine and birds would sing. > > > > I don't think the irc channel is logged so I'll respin with a cleaner > changelog for both patches and the subject of patch 1. FYI: The original distro bug report: https://bugs.archlinux.org/task/79656 The original userspace program bug report: https://github.com/cebix/macemu/issues/271 (and yes, this is my fault, I should've raised this on the ML with the regression tracker and all, but I tried to write my own fix then realized it was trickier than it looked and pinged Liam) -- Pedro
