This is a note to let you know that I've just added the patch titled flow_offload: return EOPNOTSUPP for the unsupported mpls action type to the 5.10-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: flow_offload-return-eopnotsupp-for-the-unsupported-m.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 21debc4a09821e73bf37118f6a4a584dc958a540 Author: Baowen Zheng <baowen.zheng@xxxxxxxxxxxx> Date: Mon Dec 13 15:46:04 2021 +0100 flow_offload: return EOPNOTSUPP for the unsupported mpls action type [ Upstream commit 166b6a46b78bf8b9559a6620c3032f9fe492e082 ] We need to return EOPNOTSUPP for the unsupported mpls action type when setup the flow action. In the original implement, we will return 0 for the unsupported mpls action type, actually we do not setup it and the following actions to the flow action entry. Fixes: 9838b20a7fb2 ("net: sched: take rtnl lock in tc_setup_flow_action()") Signed-off-by: Baowen Zheng <baowen.zheng@xxxxxxxxxxxx> Signed-off-by: Simon Horman <simon.horman@xxxxxxxxxxxx> Acked-by: Jamal Hadi Salim <jhs@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 8073657a0fd25..cb1331b357451 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -3703,6 +3703,7 @@ int tc_setup_flow_action(struct flow_action *flow_action, entry->mpls_mangle.ttl = tcf_mpls_ttl(act); break; default: + err = -EOPNOTSUPP; goto err_out_locked; } } else if (is_tcf_skbedit_ptype(act)) {