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Chris Lu
210afacd12
* s3: reject list-type paired with another operation subresource ?list-type=2&ownershipControls= routes to ListObjectsV2 (the list-type route is registered first) while the IAM action resolver resolves the ownershipControls selector to s3:GetBucketOwnershipControls. A principal denied s3:ListBucket but allowed s3:GetBucketOwnershipControls would therefore list the bucket. list-type selects an operation just like the other keys in operationSubresources, so add it there and reject the combination before routing, matching the fix for policy&tagging (#10987). * s3: resolve list-type to s3:ListBucket ahead of bucket subresources The router registers the ListObjectsV2 route ahead of the bucket subresource routes, so the action resolver should resolve list-type the same way. Without this, a request carrying list-type and another operation selector resolves to the subresource action (e.g. s3:GetBucketOwnershipControls) while being served by ListObjectsV2. The ambiguity guard rejects such combinations before routing, but resolving list-type to s3:ListBucket keeps the resolver aligned with the router, mirroring how versions is handled. * s3: match list-type=2 exactly in action resolver The router selects ListObjectsV2 only for list-type=2; other values fall through to the subresource routes. Resolve the same way so the action matches the handler for every list-type value, not just 2.