Re: NULL pointer dereference in cgroup

[Tejun Heo]

Hello,

On Wed, Mar 08, 2017 at 06:46:16PM +0000, Luis Henriques wrote:
> Hi,
> 
> I've seen this only once, and can't reproduce it.  But here it is anyway:
> 
> https://postimg.org/image/pn94k1yov
> 
> (Not sure png files are accepted on LKML.)
> 
> This occurred in a VM while booting 4.11.0-rc1

It was trying to migrate a process and encountered a NULL deref while
trying to find the destination css_set.  Unfortunately, it's difficult
to tell what went wrong with just the posted backtrace.  If you built
the kernel with debuginfo, the output of addr2line could help quite a
bit.

Thanks.

-- 
tejun