linux-kernel - Re: oops in uevent_helper [was: mmotm 2010-01-13-12-17 uploaded]

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Message-ID: <20100212023934.GA2210@localhost.localdomain>
Date:	Thu, 11 Feb 2010 21:39:34 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Jiri Slaby <jirislaby@...il.com>,
	linux-kernel@...r.kernel.org, Greg KH <gregkh@...e.de>,
	Kay Sievers <kay.sievers@...e.de>
Subject: Re: oops in uevent_helper [was: mmotm 2010-01-13-12-17 uploaded]

On Thu, Feb 11, 2010 at 02:25:13PM -0800, Andrew Morton wrote:
> On Thu, 11 Feb 2010 21:57:45 +0100
> Andi Kleen <andi@...stfloor.org> wrote:
> 
> > On Wed, Feb 10, 2010 at 08:54:11PM +0100, Jiri Slaby wrote:
> > > On 01/23/2010 12:52 AM, Andrew Morton wrote:
> > > > On Sat, 16 Jan 2010 00:38:32 +0100
> > > > Jiri Slaby <jirislaby@...il.com> wrote:
> > > > 
> > > >> (fixed subject)
> > > >>
> > > >> On 01/15/2010 08:33 PM, Jiri Slaby wrote:
> > > >>> On 01/13/2010 09:17 PM, akpm@...ux-foundation.org wrote:
> > > >>>> The mm-of-the-moment snapshot 2010-01-13-12-17 has been uploaded to
> > > >>>
> > > >>> Hi, it crashes on my machine while booting up. It is a regression
> > > >>> against 2010-01-06-14-34. Doesn't it ring a bell by a chance?
> > > >>
> > > >> Well, memcpying to something like this:
> > > >> char *uevent_helper = CONFIG_UEVENT_HELPER_PATH;
> > > >> doesn't sound like a good idea :).
> > > >>
> > > >> And it's racy with sysctl path anyway.
> > > >>
> > > >> Looks like added by:
> > > >> sysctl-convert-hotplug-helper-string-to-proc_rcu_string.patch
> > > 
> > > Ping Andi.
> > 
> > Sorry, busy with other stuff right now. There was at least one
> > other unsolved problem in this patch series. I'll try to look
> > at it on the weekend.
> > 
> > Andrew, it's ok for me if you just drop the series for now;
> > I'll resubmit.
> 
> urgh, must I?  That trashes Neil's
> kmod-add-init-function-to-usermodehelper.patch and
> kmod-replace-call_usermodehelper_pipe-with-use-of-umh-init-function-and-resolve-limit.patch
> and probably requires repairing other stuff and sets the testing status
> back to "square one".
> 
> If you have patches queued, please make the time to support them!
> 
> 
> 
Andrew, I'll take a closer look at it first thing in the morning.  If we can at
all help it, I'd really like to avoid dropping the whole series.  I'll let you
know just as soon as I have something.
Neil

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