net: ieee802154: stop dump llsec params for monitors

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@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-16-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index effc4c1a4780729d8fd45cc342af19e7a3025132..05f6bd89a7dd8e526369db8247a8fd9661cf41f2 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -820,8 +820,13 @@ nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
                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);