pan3793 commented on code in PR #8450:
URL: https://github.com/apache/hadoop/pull/8450#discussion_r3125616400


##########
.github/workflows/tmpl_build_and_test.yml:
##########
@@ -86,6 +90,20 @@ jobs:
     name: Build Image ${{ inputs.os }}-${{ inputs.branch }}
     runs-on: ubuntu-24.04
     needs: [ precondition ]
+    # Security: this does not leak write access for our image repository to
+    # forked repos.
+    #
+    # We have `packages: write` permissions for our GITHUB_TOKEN below. 
However:
+    #
+    # - For `pull_request`, GitHub downgrades GITHUB_TOKEN permissions to
+    #   read-only.
+    # - For `push` triggers on a fork, the GITHUB_TOKEN retains write
+    #   permissions, but the `push` is happening in the context of the fork, 
not
+    #   the upstream repo.
+    # - For `pull_request_target` (risky), the write permission is
+    #   overridden by our repository's setting "Send write tokens to workflows
+    #   from pull requests" which should be disabled.
+    #   See https://issues.apache.org/jira/browse/INFRA-27839 for confirmation.

Review Comment:
   I read the conversion in the infra tikcet, I mean this one, but maybe we are 
talking about different things? then we have different conclusions.
   
   <img width="1736" height="888" alt="image" 
src="https://github.com/user-attachments/assets/21eb6d08-615e-40fa-ada4-ba7e3427c43c";
 />
   
   anyway, this is easy to verify - ask the infra team to change something, if 
it breaks us, then ask them to change back.



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