linux-kernel - Re: 3.0-rc6: USB khubd deadlock when hub is powered down

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:	Thu, 7 Jul 2011 23:56:47 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	Greg KH <greg@...ah.com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: 3.0-rc6: USB khubd deadlock when hub is powered down

On Jul 07 Sarah Sharp wrote:
> On Thu, Jul 07, 2011 at 09:24:49PM +0200, Stefan Richter wrote:
> > On Jul 07 Greg KH wrote:
> > > Can you test Linus's tree, along with a patch sent yesterday from Alan
> > > Stern to the linux-usb mailing list (attached below)?  That should
> > > resolve this issue, if not, please let us know.
> > 
> > OK.  I am using 3.0-rc6-71-g4dd1b49 plus Alan's "USB: additional
> > regression fix for device removal" now.  So far it survived a dozen of
> > power toggles of the hub and the attached devices.  Thanks.
> > 
> > Alan Stern wrote:
> > > Still, we need to rewrite this stuff.  A possible race remains,
> > 
> > On a general level, the last few kernel.org releases have all been rather
> > weak.  Dissatisfied,
> 
> For USB regressions or the kernel overall?

Kernel overall.  USB unplug issues have been there before, but not as
reproducible as this one now.  (Which is apparently fixed for me now.)

I felt compelled to comment on Alan's sentence though because this does
not sound like the 2.6 development approach at all.  (Some other
subsystem projects, outside USB, ignore that approach anyway and work 2.5
style.)
-- 
Stefan Richter
-=====-==-== -=== --===
http://arcgraph.de/sr/
--
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/