CI: update per kernel tests

Signed-off-by: Florian Lehner <dev@der-flo.net>

.github/workflows/integration.yml

@@ -48,28 +48,29 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        kernel-version: ["4.9", "4.14", "4.19", "5.4", "5.10", "5.15", "6.1"]
+        kernel-version: ["4.9", "4.14", "4.19", "5.4", "5.10", "5.15", "6.1", "6.6"]
     steps:
-      - name: install qemu && curl
+      - name: install dependencies
         # Make sure required software packages are available.
         run: |
           sudo apt --yes update
-          sudo apt --yes install qemu-system-x86 curl
+          sudo apt --yes install --no-install-recommends qemu-system-x86 docker-buildx-plugin
 
       - name: get initramfs
         # Fetch the initramfs.cpio that was created in the previous step.
         uses: actions/download-artifact@v4
         with:
           name: initramfs
-      
-      - name: get kernel
+
+      - name: fetch and unpack Linux kernel
         # Fetch the public kernel image that will be used in this test run.
+        # Inspired by extract_oci_image from cilium/ebpf.
         run: |
-          curl -s -L -O --fail https://github.com/cilium/ci-kernels/raw/master/linux-${{ matrix.kernel-version }}-amd64.tgz
-          tar xvf linux-${{ matrix.kernel-version }}-amd64.tgz
+          mkdir /tmp/ci-kernel
+          echo "FROM ghcr.io/cilium/ci-kernels:${{ matrix.kernel-version }}" | docker buildx build --quiet --pull --output="/tmp/ci-kernel" -     
 
       - name: run tests on kernel
         # Run the tests.
         run: |
-          qemu-system-x86_64  -nographic  -append "console=ttyS0" -m 2G -kernel boot/vmlinuz -initrd initramfs.cpio | tee log.txt
+          qemu-system-x86_64  -nographic  -append "console=ttyS0" -m 2G -kernel /tmp/ci-kernel/boot/vmlinuz -initrd initramfs.cpio | tee log.txt
           grep PASS log.txt