From: Jianguo Wu <wujianguo@xxxxxxxxxxxxxxx>
[ Upstream commit eb5fb629f56da3f40f496c807da44a7ce7644779 ]
When add address with port, it is mean to create a listening socket,
and send an ADD_ADDR to remote, so it must have flag signal set,
add this check in mptcp_pm_parse_addr().
Fixes: a77e9179c7651 ("mptcp: deal with MPTCP_PM_ADDR_ATTR_PORT in PM netlink")
Acked-by: Geliang Tang <geliangtang@xxxxxxxxx>
Reviewed-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
Signed-off-by: Jianguo Wu <wujianguo@xxxxxxxxxxxxxxx>
Signed-off-by: Mat Martineau <mathew.j.martineau@xxxxxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/mptcp/pm_netlink.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 2469e06a3a9d..3f5d90a20235 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -971,8 +971,14 @@ skip_family:
if (tb[MPTCP_PM_ADDR_ATTR_FLAGS])
entry->flags = nla_get_u32(tb[MPTCP_PM_ADDR_ATTR_FLAGS]);
- if (tb[MPTCP_PM_ADDR_ATTR_PORT])
+ if (tb[MPTCP_PM_ADDR_ATTR_PORT]) {
+ if (!(entry->flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
+ NL_SET_ERR_MSG_ATTR(info->extack, attr,
+ "flags must have signal when using port");
+ return -EINVAL;
+ }
entry->addr.port = htons(nla_get_u16(tb[MPTCP_PM_ADDR_ATTR_PORT]));
+ }
return 0;
}
--
2.30.2
