Re: Bug#412149: general: "usb:" stopped working in both gpsbabel and jpilot

[Reid Priedhorsky <reid@reidster.net>]

Steve Langasek wrote:
> On Fri, Feb 23, 2007 at 06:27:01PM -0600, Reid Priedhorsky wrote:
> > The following are the packages I upgraded between working and non-working USB:
>
> <snip>
>
> > 2007-02-20 21:36:47 status installed libgphoto2-port0 2.2.1-16
> > 2007-02-20 21:36:50 status installed libgphoto2-2 2.2.1-16
>
> <snip>
>
> > I'm not sure for which package this bug report is appropriate. libusb seems a
> > likely candidate, but I haven't upgraded that package since October and
> > haven't touched the configuration in a while.
>
> This latest libgphoto update fixed a security hole whereby libgphoto's udev
> rules would wrongly grant access to the plugdev group on all usb devices
> instead of just those related to cameras.  An interesting possibility here
> is that your use of libusb depended on libgphoto's bug. :)
>
> This was bug #405006.  A comment from this bug log:
>
>  > What class of USB devices are ending up under group plugdev that
>  > shouldn't?
>
>  It concerns the raw USB devices, in /dev/bus/usb/, used by libusb for
>  userland drivers. 
>
> So I would say this isn't a bug at all, but that you need to set up
> additional permissions on /dev/bus/usb/* for your use.

Hi Steve,

(CC'ed to debian-user to help others with similar problems.)

Indeed. It took me a little while to figure out enough about udev to 
hack in a working config. What I ended up doing was restoring 
libgphoto2's buggy behavior ;) -- indeed problematic in the general 
case, but fine for my 1-user system. I edited /etc/udev/udev.rules as 
below and now everything works again.

Thanks for your quick and helpful reply! It was very much appreciated.

Reid


--- /etc/udev/udev.rules~       2006-11-26 17:22:36.000000000 -0600
+++ /etc/udev/udev.rules        2007-02-24 17:18:08.000000000 -0600
@@ -34,7 +34,7 @@

 # usbfs-like devices
 SUBSYSTEM=="usb_device",       PROGRAM="/bin/sh -c 'K=%k; 
K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", 
ACTION=="add", \
-                               NAME="%c"
+                               NAME="%c", GROUP="plugdev"

 # serial devices
 KERNEL=="capi",                        NAME="capi20", 
SYMLINK+="isdn/capi20"