The IOKit property "Protocol Characteristics" is needed for some types of storage operations, and should be allowed in the WebContent process.
This property is already available on macOS, but was missing from the iOS sandbox.
Created attachment 350054 [details]
Comment on attachment 350054 [details]
Clearing flags on attachment: 350054
Committed r236158: <https://trac.webkit.org/changeset/236158>
All reviewed patches have been landed. Closing bug.