On Tue, Jan 31, 2012 at 2:21 AM, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote: > On Mon, Jan 30, 2012 at 07:20:18PM -0600, Omar Ramirez Luna wrote: >> This structure is still used after it has been freed, since it >> is being allocated in probe, calls to free it have been moved to >> module's remove routine. >> >> This should fix the follwoing messages when attempting to remove the >> module: >> drv_get_first_dev_extension: Failed to retrieve the object handle >> drv_get_first_dev_extension: Failed to retrieve the object handle >> drv_destroy: Failed to store DRV object >> mgr_destroy: Failed to store MGR object >> > > So this is only triggered when you do an rmmod to remove the module? Yes. > Probably that's not stable material. The critical issue is that for a small window the freed memory can be filled with something else and the driver still might dereference that memory which no longer belongs to it, thus causing a crash. But I guess that falls into "this can be a problem", it is ok if it is being left out of stable. Thanks, Omar _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
