Damian Tometzki <damian@xxxxxxxxxxxxxx> wrote: > the revert of f1b4cb650b9a0eeba206d8f069fcdc532bfbcd74 solved the issue of > the kernel dump. That almost certainly did not fix the problem - merely hid the wanring. Prior to f1b4cb650b9a0eeba206d8f069fcdc532bfbcd74, ->user_backed is explicitly set if the iov_iter is initialised to a user-backed type, now it's just inferred from the type being 0 or 1 - so I think that the iov_iter has not been initialised somewhere. Somewhere being from SMB2_tcon() and cifs_send_recv() on down. David