Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: Kernel Oops during usb usage (2.6.5) | Date | Tue, 27 Apr 2004 11:04:59 +0200 |
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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
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