[PATCH 4.19 19/57] net: ieee802154: stop dump llsec seclevels for monitors

From: Greg Kroah-Hartman
Date: Mon Apr 26 2021 - 03:44:43 EST


From: Alexander Aring <aahringo@xxxxxxxxxx>

[ 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@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210405003054.256017-13-aahringo@xxxxxxxxxx
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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;
--
2.30.2