This is a note to let you know that I've just added the patch titled Revert "xfrm: state and policy should fail if XFRMA_IF_ID 0" to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: revert-xfrm-state-and-policy-should-fail-if-xfrma_if_id-0.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it.