linux-kernel - Re: [PATCH v2] PM: Fix dev_pm_put_subsys_data() to not call kfree() while holding device power lock

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:	Mon, 6 May 2013 13:33:30 -0700
From:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Shuah Khan <shuah.kh@...sung.com>,
	"len.brown@...el.com" <len.brown@...el.com>,
	"rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"shuahkhan@...il.com" <shuahkhan@...il.com>
Subject: Re: [PATCH v2] PM: Fix dev_pm_put_subsys_data() to not call kfree()
 while holding device power lock

On Mon, May 06, 2013 at 09:56:56PM +0200, Rafael J. Wysocki wrote:
> On Monday, May 06, 2013 12:41:19 PM gregkh@...uxfoundation.org wrote:
> > On Mon, May 06, 2013 at 07:04:53PM +0000, Shuah Khan wrote:
> > > dev_pm_put_subsys_data() calls kfree() while holding device power lock, when
> > > the reference count is 0. Fix it to call kfree() after releasing the lock.
> > > 
> > > Signed-off-by: Shuah Khan <shuah.kh@...sung.com>
> > > Reviewed-by: Pavel Machek <pavel@....cz>
> > > Reviewed-by: Rafael Wysocki <rafael.j.wysocki@...el.com>
> > > ---
> > >  drivers/base/power/common.c |    8 +++++---
> > >  1 file changed, 5 insertions(+), 3 deletions(-)
> > 
> > Is this causing a problem now, and it should go into 3.10 and earlier
> > kernels (if so, which ones?), or can it just wait until 3.11 as it's
> > just a cleanup fix?
> 
> I think it's OK to push the fix for 3.10, but I'll take care of this (I have
> a bunch of fixes for 3.10 anyway, but I'll send a pull request after -rc1,
> because people are sending me fixes pretty much continuously ATM).

Ok, feel free to add:

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

--
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/