Re: [PATCH] x86/x2apic: fix x2apic_cluster_probe null pointer

[Han, Huaitong]

On Fri, 2016-08-12 at 13:50 +0800, Wanpeng Li wrote:
> 2016-08-12 13:30 GMT+08:00 Huaitong Han <huaitong.han@xxxxxxxxx>:
> > percpu cpus_in_cluster is a pointer with CONFIG_CPUMASK_OFFSTACK, cpu_in_cluster
> > is not alloced memory before x2apic_prepare_cpu is invoked, so cpumask_set_cpu
> > would get a NULL pointer bug:
> >  BUG: unable to handle kernel NULL pointer dereference at (null)
> >  IP: [<ffffffff8105ac25>] x2apic_cluster_probe+0x35/0x70
> 
> Could you try this? https://lkml.org/lkml/2016/8/4/345
Get, it has been fixed,
http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=d52c0569bab4edc888832df44dc7ac28517134f6
> 
> Regards,
> Wanpeng Li