net: ieee802154: forbid monitor for add llsec seclevel

[ Upstream commit 9ec87e322428d4734ac647d1a8e507434086993d ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 29916f8cfdc3952cb0af62478c1ca7fa80216633..b1c55db73764872d3a5c1d12aa24b95047dd162f 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2138,6 +2138,9 @@ 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;