From cbd7b37b4672921e7971bee696562bfe79b4251b Mon Sep 17 00:00:00 2001
From: Alexander Aring <aahringo@redhat.com>
Date: Sun, 4 Apr 2021 20:30:51 -0400
Subject: [PATCH] net: ieee802154: stop dump llsec seclevels for monitors

[ Upstream commit 4c9b4f55ad1f5a4b6206ac4ea58f273126d21925 ]

This patch stops dumping llsec seclevels for monitors 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/20210405003054.256017-13-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/ieee802154/nl802154.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index eaeff7c08bdf..29916f8cfdc3 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2048,6 +2048,11 @@ nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
 	if (err)
 		return err;
 
+	if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
+		err = skb->len;
+		goto out_err;
+	}
+
 	if (!wpan_dev->netdev) {
 		err = -EINVAL;
 		goto out_err;