[PATCH AUTOSEL 5.4 19/39] net: ieee802154: forbid monitor for set llsec params

[Sasha Levin]

From: Alexander Aring <aahringo@xxxxxxxxxx>

[ Upstream commit 88c17855ac4291fb462e13a86b7516773b6c932e ]

This patch forbids to set llsec params for monitor interfaces which we
don't support yet.

Reported-by: syzbot+8b6719da8a04beeafcc3@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210405003054.256017-3-aahringo@xxxxxxxxxx
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 net/ieee802154/nl802154.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index c398f1ac74b8..748e0aac0b78 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1400,6 +1400,9 @@ static int nl802154_set_llsec_params(struct sk_buff *skb,
 	u32 changed = 0;
 	int ret;
 
+	if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+		return -EOPNOTSUPP;
+
 	if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
 		u8 enabled;
 
-- 
2.30.2