I came across this today in another distribution. It turned out to be a protections issue; one of the ancestor directories wasn't accessible by root.
umount gives the error message you cite when it receives an EACCES error return, which is extremely misleading. I wonder if this should be reported as a bug against util-linux?
I came across this today in another distribution. It turned out to be a protections issue; one of the ancestor directories wasn't accessible by root.
umount gives the error message you cite when it receives an EACCES error return, which is extremely misleading. I wonder if this should be reported as a bug against util-linux?