bug#80060: mv: move files across bind mounts using the rename syscall
Martin D Kealey <[email protected]> Mon, 29 Dec 2025 15:11:44 +1000
| Newsgroups | gmane.comp.gnu.core-utils.bugs |
|---|---|
| Message-ID | <CAN_U6MU5sdSHJyF=KcBvJ0FGh0-2yU66zJhGTcrNeiLs4jrgOg@mail.gmail.com> |
On Tue, 23 Dec 2025 at 10:08, Andrei Topala <[email protected]> wrote: > mv already tries rename() first. The problem is that rename() returns > EXDEV even when source and destination are on the same physical device but > accessed through different bind mount points. > How does `mv` know that it's a problem, rather than working as intended by the sysadmin? One use-case for bind mounts is specifically to prevent `rename()` and/or `link()` into or out of a directory, and defeating this could impact system security. -Martin