Re: NULL pointer dereference during memory hotremove

[Michal Hocko]

On Fri 17-05-19 13:33:25, Pavel Tatashin wrote:
> On Fri, May 17, 2019 at 1:24 PM Pavel Tatashin
> <pasha.tatashin@xxxxxxxxxx> wrote:
> >
> > On Fri, May 17, 2019 at 1:22 PM Pavel Tatashin
> > <pasha.tatashin@xxxxxxxxxx> wrote:
> > >
> > > On Fri, May 17, 2019 at 10:38 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote:
> > > >
> > > > On Fri 17-05-19 10:20:38, Pavel Tatashin wrote:
> > > > > This panic is unrelated to circular lock issue that I reported in a
> > > > > separate thread, that also happens during memory hotremove.
> > > > >
> > > > > xakep ~/x/linux$ git describe
> > > > > v5.1-12317-ga6a4b66bd8f4
> > > >
> > > > Does this happen on 5.0 as well?
> > >
> > > Yes, just reproduced it on 5.0 as well. Unfortunately, I do not have a
> > > script, and have to do it manually, also it does not happen every
> > > time, it happened on 3rd time for me.
> >
> > Actually, sorry, I have not tested 5.0, I compiled 5.0, but my script
> > still tested v5.1-12317-ga6a4b66bd8f4 build. I will report later if I
> > am able to reproduce it on 5.0.
> 
> OK, confirmed on 5.0 as well, took 4 tries to reproduce:

What is the last version that survives? Can you bisect?
-- 
Michal Hocko
SUSE Labs