linux-kernel - Re: [PATCH v1] xen: avoid crash in disable_hotplug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <92e9c7f0-598d-b20c-4847-320e01f6ec06@suse.com>
Date:   Wed, 5 Sep 2018 14:04:01 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Olaf Hering <olaf@...fle.de>
Cc:     xen-devel@...ts.xenproject.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] xen: avoid crash in disable_hotplug_cpu

On 05/09/18 13:50, Olaf Hering wrote:
> Am Wed, 5 Sep 2018 12:55:58 +0200
> schrieb Juergen Gross <jgross@...e.com>:
> 
>> the last cpu
> 
> Which one is the "last" one? I mean, if cpu#0 never can be offlined than perhaps the code should check for just that and return early. But if cpu#0 could be disabled while some other cpu is the remaining cpu, some other check is needed I think.

num_online_cpus() == 1


Juergen