On Fri, Jan 11, 2019 at 01:12:36PM -0500, Qian Cai wrote: > On Fri, 2019-01-11 at 09:31 -0800, Matthew Wilcox wrote: > > On Fri, Jan 11, 2019 at 11:51:45AM -0500, Qian Cai wrote: > > > Reported-by: Esme <esploit@xxxxxxxxxxxxx> > > > Signed-off-by: Qian Cai <cai@xxxxxx> > > > > What change introduced this bug? We need a Fixes: line so the stable > > people know how far to backport this fix. > > It looks like, > > Fixes: 6d58452dc06 (rbtree: adjust root color in rb_insert_color() only when > necessary) > > where it no longer always paint the root as black. > > Also, copying this fix for the original author and reviewer. > > https://lore.kernel.org/lkml/20190111165145.23628-1-cai@xxxxxx/ Great, thanks! We have a test-suite (lib/rbtree_test.c); could you add a test to it that will reproduce this bug without your patch applied?
