It would be undesirable to let files in the debuginfod cache be accidentally modified after download. We should chmod them 444 or equivalent after a download is completed.
commit 92980edc829c816fabd00df8694acd0a4976902f Author: Frank Ch. Eigler <fche@redhat.com> Date: Mon Apr 26 12:21:03 2021 -0400 PR27571: debuginfod client cache - file permissions