Re: Kernel Oops during usb usage (2.6.5)

[Oliver Neukum <oliver@neukum.org>]

Am Dienstag, 27. April 2004 00:31 schrieb Greg KH:
> On Tue, Apr 27, 2004 at 12:17:34AM +0200, Oliver Neukum wrote:
> > Am Montag, 26. April 2004 21:53 schrieb Greg KH:
> > > On Mon, Apr 26, 2004 at 01:06:15PM -0400, Bill Davidsen wrote:
> > > > Just in general, if there is anything a non-root user can do to crash
> > > > the system, it's probably a kernel bug by definition. It doesn't
> > > > matter that's it a stupid thing to do, it might be malicious. And in
> > > > this case it might just be user error.
> > >
> > > But you either have to be root in order to talk to usbfs, or you were
> > > root when you gave a user access to the usbfs node.  So either way, a
> > > "normal" user can't even do this.
> >
> > Greg,
> >
> > that's not an answer. It in effect means that usbfs is useless.
>
> Heh.  So the correct answer is:
> 	- don't do that.  Talking to the same device through usbfs at
> 	  the same time by multiple programs is cause for lots of bad
> 	  things to happen to your device, and might possibly cause it
> 	  to hang.  If you want to allow a user to access a device
> 	  through usbfs, make sure you trust them.
>
> Better?  :)

But that's not the issue, he got an oops.
No, don't do that means: Reserve usbfs to root.
Crashing a device which access is given to is maybe acceptable. Anything
more clearly is not.

	Regards
		Oliver