From: "Han, Huaitong" <huaitong.han@intel.com>
To: "kernellwp@gmail.com" <kernellwp@gmail.com>
Cc: "tglx@linutronix.de" <tglx@linutronix.de>,
"hpa@zytor.com" <hpa@zytor.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH] x86/x2apic: fix x2apic_cluster_probe null pointer
Date: Fri, 12 Aug 2016 05:59:25 +0000 [thread overview]
Message-ID: <1470981565.3077.1.camel@intel.com> (raw)
In-Reply-To: <CANRm+CyCe5s-eMTtGFbxR1uH-Vbg42pQhE_Fci43ePz70vyH8Q@mail.gmail.com>
On Fri, 2016-08-12 at 13:50 +0800, Wanpeng Li wrote:
> 2016-08-12 13:30 GMT+08:00 Huaitong Han <huaitong.han@intel.com>:
> > 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
prev parent reply other threads:[~2016-08-12 6:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-12 5:30 [PATCH] x86/x2apic: fix x2apic_cluster_probe null pointer Huaitong Han
2016-08-12 5:50 ` Wanpeng Li
2016-08-12 5:59 ` Han, Huaitong [this message]
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