On Thu, Jan 12, 2012 at 4:15 PM, Paul Taysom <taysom@xxxxxxxxxxxx> wrote: > From: Paul Taysom <taysom@xxxxxxxxxx> > > A USB stick with a ext file system on it, would occasionally crash > when the stick was pulled. > > The problem was a timer was being set on the Backing Device Interface, > bdi, after the USB device had been removed and the bdi had been > unregistered. The bdi would then be later reinitialized by zeroing > the timer without removing from the timer from the timer queue. > This would eventually result in a kernel crash (NULL ptr dereference). What backtrace did you see when it crashed? There have been a number of reports where sd_revalidate_disk is at the top of the backtrace and this sounds like it might be related. josh -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
