[PATCH 4.19 65/66] net: ieee802154: stop dump llsec params for monitors

[Greg Kroah-Hartman]

From: Alexander Aring <aahringo@xxxxxxxxxx>

commit 1534efc7bbc1121e92c86c2dabebaf2c9dcece19 upstream.

This patch stops dumping llsec params for monitors which we don't support
yet. Otherwise we will access llsec mib which isn't initialized for
monitors.

Reported-by: syzbot+cde43a581a8e5f317bc2@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210405003054.256017-16-aahringo@xxxxxxxxxx
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ieee802154/nl802154.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -836,8 +836,13 @@ nl802154_send_iface(struct sk_buff *msg,
 		goto nla_put_failure;
 
 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
+	if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+		goto out;
+
 	if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
 		goto nla_put_failure;
+
+out:
 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
 
 	genlmsg_end(msg, hdr);