build: Set permissions for GitHub actions (#1369)

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.

- 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/)

Signed-off-by: naveen <172697+naveensrinivasan@users.noreply.github.com>

Author: naveensrinivasan

.github/workflows/cancel.yml

@@ -9,8 +9,13 @@ name: "Cancel"
 on:
   push:
 
+permissions:
+  contents: read
+
 jobs:
   cancel:
+    permissions:
+      actions: write  # for styfle/cancel-workflow-action to cancel/stop running workflows
     runs-on: ubuntu-latest
     steps:
       - name: "Cancel Previous Runs"

.github/workflows/kit.yml

@@ -32,6 +32,9 @@ defaults:
 env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1
 
+permissions:
+  contents: read
+
 jobs:
   wheels:
     name: "Build ${{ matrix.os }} ${{ matrix.py }} ${{ matrix.arch }} wheels"

.github/workflows/quality.yml

@@ -18,6 +18,9 @@ defaults:
 env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     name: "Pylint etc"

.github/workflows/testsuite.yml

@@ -19,6 +19,9 @@ env:
   PIP_DISABLE_PIP_VERSION_CHECK: 1
   COVERAGE_IGOR_VERBOSE: 1
 
+permissions:
+  contents: read
+
 jobs:
   tests:
     name: "Python ${{ matrix.python-version }} on ${{ matrix.os }}"