On Mon, 29 Mar 2021 12:50:39 -0400 Sasha Levin wrote: > The patch below does not apply to the 5.4-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@xxxxxxxxxxxxxxx>. > ------------------ original commit in Linus's tree ------------------ > > From dcc32f4f183ab8479041b23a1525d48233df1d43 Mon Sep 17 00:00:00 2001 > From: Jakub Kicinski <kuba@xxxxxxxxxx> > Date: Wed, 17 Mar 2021 09:55:15 -0700 > Subject: [PATCH] ipv6: weaken the v4mapped source check Hi Sasha! MPTCP did not exist in older trees, you'd just need to drop that chunk: $ git rm net/mptcp/subflow.c and the rest should apply cleanly. Would you mind trying that? Thanks!