[PATCH 4.4 32/38] net: ieee802154: forbid monitor for set llsec params

[Greg Kroah-Hartman]

From: Alexander Aring <aahri...@redhat.com>

commit 88c17855ac4291fb462e13a86b7516773b6c932e upstream.

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

Reported-by: syzbot+8b6719da8a04beeaf...@syzkaller.appspotmail.com
Signed-off-by: Alexander Aring <aahri...@redhat.com>
Link: https://lore.kernel.org/r/20210405003054.256017-3-aahri...@redhat.com
Signed-off-by: Stefan Schmidt <ste...@datenfreihafen.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/ieee802154/nl802154.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1367,6 +1367,9 @@ static int nl802154_set_llsec_params(str
        u32 changed = 0;
        int ret;
 
+       if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
+               return -EOPNOTSUPP;
+
        if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
                u8 enabled;