On Fri, Jul 28, 2017 at 10:28:16AM -0700, Cong Wang wrote: > On Fri, Jul 28, 2017 at 9:43 AM, Ido Schimmel <ido...@idosch.org> wrote: > > On Fri, Jul 28, 2017 at 06:00:47PM +0200, Michał Mirosław wrote: > >> Dear NetDevs, > >> > >> Before I go to bisecting, have you seen a following NULL dereference, > >> yet? Where should I start looking? It is triggered by deleting netns > >> (cut-down script attached - triggers every time). This was working > >> correctly under v4.11.x. > > > > Thanks for the report. I just reproduced this on my system. I believe > > the problem is a missing NULL check for 'in_dev' in > > call_fib_nh_notifiers(). I'll test a fix. > > But your commit 982acb97560c8118c2109504a22b0d78a580547d > is merged in v4.11-rc1. How could 4.11.x work correctly?
It doesn't. I just reproduced this on v4.11.
