net: ieee802154: stop dump llsec seclevels for monitors

BugLink: https://bugs.launchpad.net/bugs/1926999
[ 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>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 87dac717d197d0b83fcad9c87f76a1d5b009f974..10fc37e45e2bd07c867b5afc30696603a5c999e6 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -2031,6 +2031,11 @@ 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;