net: ieee802154: forbid monitor for set llsec params

commit 88c17855ac4291fb462e13a86b7516773b6c932e upstream.

This patch forbids to set llsec params for monitor interfaces which we
don't support yet.

Reported-by: syzbot+8b6719da8a04beeafcc3@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-3-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 4ce2b89df4c8093138c6eda438c8baf2e2daa3b0..c1412cd87fe77ff5bb1ad892af246a8278207b20 100644 (file)
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1417,6 +1417,9 @@ static int nl802154_set_llsec_params(struct sk_buff *skb,
        u32 changed = 0;
        int ret;
 
+       if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+               return -EOPNOTSUPP;
+
        if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
                u8 enabled;