linux-kernel - Re: [PATCH] cpufreq_stats: fix race between stats allocation and first usage

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 for Android: free password hash cracker in your pocket

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

Date:	Sat, 15 Dec 2012 12:22:38 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, cpufreq <cpufreq@...r.kernel.org>,
	linux-pm <linux-pm@...r.kernel.org>
Subject: Re: [PATCH] cpufreq_stats: fix race between stats allocation and first usage

On Saturday, December 15, 2012 11:01:49 AM Konstantin Khlebnikov wrote:
> Rafael J. Wysocki wrote:
> > On Friday, December 14, 2012 02:59:21 PM Konstantin Khlebnikov wrote:
> >> This patch forces complete struct cpufreq_stats allocation for all cpus before
> >> registering CPUFREQ_TRANSITION_NOTIFIER notifier, otherwise in some conditions
> >> cpufreq_stat_notifier_trans() can be called in the middle of stats allocation,
> >> in this case cpufreq_stats_table already exists, but stat->freq_table is NULL.
> >
> > I'll queue it up for submission as v3.8 material.
> >
> > Does it need to be marked as -stable material too?
> 
> It's very old and rare bug. I think you can leave it as is.

OK

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
--
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/