Re: Kernel Oops during usb usage (2.6.5)

[Greg KH <greg@kroah.com>]

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?  :)

thanks,

greg k-h