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Chris Lu
d9b69a7f76
PutObjectAcl had four authorization and ownership bugs: - The handler embedded the resource path into the action (WriteAcp:bucket/object), and authRequest/CanDo then scoped it to the request's bucket/object again. A bucket-wide WriteAcp:bucket grant could never match, so legitimate owners got 403. - After authRequest succeeded via an IAM or bucket policy, a leftover identity.CanDo gate re-checked only the legacy Actions list, denying identities authorized purely by policies. - For canned and default ACLs, ExtractAcl generated the FULL_CONTROL grant for the requesting account instead of the object owner. An admin setting private/public-read on another account's object left the owner metadata intact but reassigned full control to the admin. - Objects without stored owner metadata (e.g. written via the filer outside S3) fell back to treating the requester as the owner, so any user with a WriteAcp grant could take them over. Non-admins are now denied; admins keep the takeover fallback. Grantee validation now also accepts the object's stored owner even when that account has been removed from the registry, so canned/XML ACLs for retired owners keep working.