linux-kernel - Re: [PATCH] sched/core: Clear the root_domain cpumasks in init

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]

Date:	Fri, 4 Dec 2015 09:30:26 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Xunlei Pang <xlpang@...hat.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH] sched/core: Clear the root_domain cpumasks in
 init_rootdomain()


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Fri, Dec 04, 2015 at 09:09:01AM +0100, Ingo Molnar wrote:
> > and then this code:
> > 
> > > >         cpumask_andnot(doms_cur[0], cpu_map, cpu_isolated_map);
> > 
> > uses it without first clearing it.
> > 
> > So is this another such bug, or am I missing something?
> 
> It uses it as destination, it does a complete write of the mask.

ah, indeed! The cpumask primitive confused me.

Thanks,

	Ingo
--
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/