Daan De Meyer
95e7ead268
userns_registry_remove() restores a sub-delegated UID range by writing the previous owner's data to u<UID>.delegate with WRITE_STRING_FILE_ATOMIC. Atomic writes go via a temp file and rename, which replaces the directory entry with a fresh inode and severs the hardlink to g<GID>.delegate. The stale GID side then keeps pointing at the prior inode with outdated owner and ancestor data, so subsequent lookups via GID return wrong results. Re-create the hardlink after the atomic write so the two views stay in sync, matching what userns_registry_store() already does after writing a new delegation.
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