On Thu, 9 Sep 2010, anil joshi wrote: > > > On Thu, Sep 9, 2010 at 7:59 PM, anil joshi <anilsjoshi123@xxxxxxxxx> wrote: > hid->dev.parent is "usb_interfae" pointer is kfree in usb_release_interfece > hid_to_usb_dev(dev) accessing hid->dev.parent > > I have tested this,while removing hid device > > usb_release_interfece is belonging to khubd process > > I get many use full information from Jiri Kosina, Markus Trippelsdorf, regarding this issue > from http://kerneltrap.org/mailarchive/linux-kernel/2010/8/12/4606155/thread#mid-4606155 > > To avoid NULL deference problem > > hiddev->exist is zero before usb_deregister_dev call in hiddev_disconnected function there fore > we could use > static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg) > { > > > if (hiddev->exist) { > hid_to_usb_dev(dev); > } else { > return -EIO > } > > > Thanks to Markus Trippelsdorf , Jiri Kosina Hi Anil, could you please send a proper patch (diff against current kernel) and a short changelog entry with the explanation, so that I could easily understand what you are proposing? Thanks! -- Jiri Kosina SUSE Labs, Novell Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
