You need sysadmin privileges to do this and I reckon that offers many other ways of causing crashes too:) It didn't seem worth attempting to prevent all device loops as it's not a cheap thing to detect and not something likely to occur in practice. Nevertheless, some userspace tools do contain some checks to avoid some cases like this already. Alasdair -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
