Set permissions for GitHub actions

- Included permissions for the action. https://github.com/ossf/scorecard/blob/main/docs/checks.md#token-permissions

https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions

https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs

[Keeping your GitHub Actions and workflows secure Part 1: Preventing pwn requests](https://securitylab.github.com/research/github-actions-preventing-pwn-requests/)

 Restrict the GitHub token permissions only to the required ones; this way, even if the attackers will succeed in compromising your workflow, they won’t be able to do much.

Signed-off-by: nathannaveen <[email protected]>

Author: nathannaveen

.github/workflows/codeql-analysis.yml

@@ -9,8 +9,15 @@ on:
   schedule:
     - cron: '37 19 * * 0'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
     name: Analyze
     runs-on: ubuntu-latest
 

.github/workflows/generate.yml

@@ -9,8 +9,14 @@ on:
         description: 'The remote kubernetes release branch to fetch openapi spec. .e.g. "release-1.23"'
 
 
+permissions:
+  contents: read
+
 jobs:
   generate:
+    permissions:
+      contents: write  # for Git to git push
+      pull-requests: write  # for repo-sync/pull-request to create pull requests
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Java

.github/workflows/snapshot.yml

@@ -6,6 +6,9 @@ on:
       - master
   workflow_dispatch: {}
 
+permissions:
+  contents: read
+
 jobs:
   verify:
     name: latest-images