Merge branch 'mptcp-fix-a-couple-of-races'

Paolo Abeni says:

====================
mptcp: fix a couple of races

The first patch addresses a division by zero issue reported by Eric,
the second one solves a similar issue found by code inspection while
investigating the former.
====================

Link: https://patch.msgid.link/cover.1731060874.git.pabeni@redhat.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>