6.5-stable review patch. If anyone has any objections, please let me know.
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From: Geliang Tang geliang.tang@suse.com
commit e5ed101a602873d65d2d64edaba93e8c73ec1b0f upstream.
This patch drops id 0 limitation in mptcp_nl_cmd_sf_create() to allow creating additional subflows with the local addr ID 0.
There is no reason not to allow additional subflows from this local address: we should be able to create new subflows from the initial endpoint. This limitation was breaking fullmesh support from userspace.
Fixes: 702c2f646d42 ("mptcp: netlink: allow userspace-driven subflow establishment") Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/391 Cc: stable@vger.kernel.org Suggested-by: Matthieu Baerts matthieu.baerts@tessares.net Reviewed-by: Matthieu Baerts matthieu.baerts@tessares.net Signed-off-by: Geliang Tang geliang.tang@suse.com Signed-off-by: Mat Martineau martineau@kernel.org Link: https://lore.kernel.org/r/20231004-send-net-20231004-v1-2-28de4ac663ae@kerne... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mptcp/pm_userspace.c | 6 ------ 1 file changed, 6 deletions(-)
--- a/net/mptcp/pm_userspace.c +++ b/net/mptcp/pm_userspace.c @@ -307,12 +307,6 @@ int mptcp_nl_cmd_sf_create(struct sk_buf goto create_err; }
- if (addr_l.id == 0) { - NL_SET_ERR_MSG_ATTR(info->extack, laddr, "missing local addr id"); - err = -EINVAL; - goto create_err; - } - err = mptcp_pm_parse_addr(raddr, info, &addr_r); if (err < 0) { NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");