linux-kernel - Re: can we move USB_DEVICEFS to non-embedded?

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]

Message-Id: <1247053344.12859.29.camel@quest>
Date:	Wed, 08 Jul 2009 12:42:24 +0100
From:	Scott James Remnant <scott@...ntu.com>
To:	Dave Airlie <airlied@...il.com>
Cc:	Kay Sievers <kay.sievers@...y.org>, Greg KH <gregkh@...e.de>,
	Jeff Chua <jeff.chua.linux@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Jones <davej@...hat.com>, Peter Jones <pjones@...hat.com>
Subject: Re: can we move USB_DEVICEFS to non-embedded?

On Wed, 2009-07-08 at 21:20 +1000, Dave Airlie wrote:

> On Wed, Jul 8, 2009 at 9:03 PM, Kay Sievers<kay.sievers@...y.org> wrote:
> > On Wed, Jul 8, 2009 at 12:54, Dave Airlie<airlied@...il.com> wrote:
> >
> >> Okay can we revert this for a better reason? it seems to have unhidden a race
> >> condition on booting some of my machines. I've booted some other machines
> >> with the same USB disk and the same kernel fine.
> >
> > Are you sure? USBFS is for userspace USB drivers, booting from
> > usb-storage devices should be fully handled by the kernel.
> >
> 
> Yes, changing just this option means the difference between a bootable
> and stuck in initrd system. maybe Peter knows if our initrd does something
> otherwise I suspect we have a race that usbfs was hiding.
> 
I assume you're not using libusual or anything like that?  We had a race
caused by libusual calling modprobe before we'd generated modules.dep

Scott
-- 
Scott James Remnant
scott@...ntu.com

Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)