edgeos: Fix kernel memory leak

This patch has been reviewed and accepted by the netfilter maintainers,
but it will likely take some time before it makes its way back to the
5.15 stable tree. Let's include it earlier since we are affected by it.

TEST=memory leak fixed

Change-Id: I9ead8ccdccb43a2b3d9b37061bf591156669fbe4
Reviewed-on: https://cos-review.googlesource.com/c/cos/overlays/board-overlays/+/36595
Reviewed-by: Joshua Emele <jemele@google.com>
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Ian Coolidge <icoolidge@google.com>
4 files changed