Hi Greg,
On 26/08/2024 14:04, gregkh@linuxfoundation.org wrote:
The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Thank you for the notification!
(...)
------------------ original commit in Linus's tree ------------------
From edd8b5d868a4d459f3065493001e293901af758d Mon Sep 17 00:00:00 2001 From: "Matthieu Baerts (NGI0)" matttbe@kernel.org Date: Mon, 19 Aug 2024 21:45:21 +0200 Subject: [PATCH] mptcp: pm: re-using ID of unused removed subflows
If no subflow is attached to the 'subflow' endpoint that is being removed, the addr ID will not be marked as available again.
Mark the linked ID as available when removing the 'subflow' endpoint if no subflow is attached to it.
While at it, the local_addr_used counter is decremented if the ID was marked as being used to reflect the reality, but also to allow adding new endpoints after that.
Fixes: b6c08380860b ("mptcp: remove addr and subflow in PM netlink")
Similar to my previous message linked to the backport of "mptcp: pm: re-using ID of unused removed ADD_ADDR" where this patch depends on 86e39e04482b ("mptcp: keep track of local endpoint still available for each msk"), I don't think we need to backport this patch to v5.15.
Cheers, Matt