linux-kernel - Re: [PATCH] [PATCH] x86: Restore proper vector locking during cpu 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] [day] [month] [year] [list]

Date:	Sun, 10 Aug 2008 16:51:57 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai.lu@....com>,
	Andi Kleen <ak@...e.de>, Glauber Costa <gcosta@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] [PATCH] x86:  Restore proper vector locking during cpu
 hotplug

Eric W. Biederman wrote:
> Having cpu_online_map change during assign_irq_vector can result
> in some really nasty and weird things happening.  The one that
> bit me last time was accessing non existent per cpu memory for non
> existent cpus.
> 
> This locking was removed in a sloppy x86_64 and x86_32 merge patch.
> 
> Guys can we please try and avoid subtly breaking x86 when we are
> merging files together?

Queuing for tip:x86/urgent.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/