net: ieee802154: forbid monitor for add llsec seclevel

This patch forbids to add llsec seclevel for monitor interfaces which we
don't support yet. Otherwise we will access llsec mib which isn't
initialized for monitors.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-14-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 9158b095ccf970da8541b3c0093393bd22780f7b..28427ce52a9b3346eebc27f3af585990100f488d 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2115,6 +2115,9 @@ static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
        struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
        struct ieee802154_llsec_seclevel sl;
 
+       if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+               return -EOPNOTSUPP;
+
        if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
                                 &sl) < 0)
                return -EINVAL;