net: ieee802154: stop dump llsec params for monitors

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@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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index f1b5c2d720de9509daf5e53df0ce9f73ccda02e6..b10b297e76b78b6a6b307762ebd9ac60720a898a 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -836,8 +836,13 @@ 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);