chore: Set permissions for GitHub actions

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: neilnaveen <42328488+neilnaveen@users.noreply.github.com>

.github/workflows/lint.yml

@@ -2,6 +2,9 @@ name: Lint
 
 on: [push, pull_request, workflow_dispatch]
 
+permissions:
+  contents: read
+
 jobs:
   build:
 

.github/workflows/release-drafter.yml

@@ -7,8 +7,14 @@ on:
       - main
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   update_release_draft:
+    permissions:
+      contents: write  # for release-drafter/release-drafter to create a github release
+      pull-requests: write  # for release-drafter/release-drafter to add label to PR
     if: github.repository == 'python-pillow/Pillow'
     runs-on: ubuntu-latest
     steps:

.github/workflows/test-cygwin.yml

@@ -99,6 +99,8 @@ jobs:
           name: Cygwin Python 3.${{ matrix.python-minor-version }}
 
   success:
+    permissions:
+      contents: none
     needs: build
     runs-on: ubuntu-latest
     name: Cygwin Test Successful

.github/workflows/test-docker.yml

@@ -2,6 +2,9 @@ name: Test Docker
 
 on: [push, pull_request, workflow_dispatch]
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
@@ -82,6 +85,8 @@ jobs:
         name: ${{ matrix.docker }}
 
   success:
+    permissions:
+      contents: none
     needs: build
     runs-on: ubuntu-latest
     name: Docker Test Successful

.github/workflows/test-mingw.yml

@@ -2,6 +2,9 @@ name: Test MinGW
 
 on: [push, pull_request, workflow_dispatch]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: windows-latest
@@ -77,6 +80,8 @@ jobs:
           CODECOV_NAME: ${{ matrix.name }}
 
   success:
+    permissions:
+      contents: none
     needs: build
     runs-on: ubuntu-latest
     name: MinGW Test Successful

.github/workflows/test-valgrind.yml

@@ -13,6 +13,9 @@ on:
       - "**.h"
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   build:
 

.github/workflows/test-windows.yml

@@ -2,6 +2,9 @@ name: Test Windows
 
 on: [push, pull_request, workflow_dispatch]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: windows-latest
@@ -189,6 +192,8 @@ jobs:
         path: dist\*.whl
 
   success:
+    permissions:
+      contents: none
     needs: build
     runs-on: ubuntu-latest
     name: Windows Test Successful

.github/workflows/test.yml

@@ -2,6 +2,9 @@ name: Test
 
 on: [push, pull_request, workflow_dispatch]
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
@@ -109,6 +112,8 @@ jobs:
         CODECOV_NAME: ${{ matrix.os }} Python ${{ matrix.python-version }}
 
   success:
+    permissions:
+      contents: none
     needs: build
     runs-on: ubuntu-latest
     name: Test Successful

.github/workflows/tidelift.yml

@@ -12,6 +12,9 @@ on:
       - ".github/workflows/tidelift.yml"
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   build:
     if: github.repository_owner == 'python-pillow'