Hello Klaus Knopper. Thanks for your bug report.
On Sat, Jun 04, 2016 at 05:35:43PM +0200, Klaus Knopper wrote: [...] > Losetup was able to setup compressed loopback (cloop) devices, which > have a similar ioctl API, until recently the code in sys-utils/losetup.c > and lib/loopdev.c was changed to only accept devices with loopbacks > major device id. [...] > Suggestion: Remove the check for > > major(st.st_rdev) == LOOPDEV_MAJOR); > > in is_loopdev() in lib/loopdev.c. Could you please raise your issue on the upstream mailing list on vger.kernel.org directly? Regards, Andreas Henriksson