--- /dev/null
+From 30393181fdbc1608cc683b4ee99dcce05ffcc8c7 Mon Sep 17 00:00:00 2001
+From: Alexander Aring <aahringo@redhat.com>
+Date: Wed, 5 Oct 2022 22:02:37 -0400
+Subject: net: ieee802154: return -EINVAL for unknown addr type
+
+From: Alexander Aring <aahringo@redhat.com>
+
+commit 30393181fdbc1608cc683b4ee99dcce05ffcc8c7 upstream.
+
+This patch adds handling to return -EINVAL for an unknown addr type. The
+current behaviour is to return 0 as successful but the size of an
+unknown addr type is not defined and should return an error like -EINVAL.
+
+Fixes: 94160108a70c ("net/ieee802154: fix uninit value bug in dgram_sendmsg")
+Signed-off-by: Alexander Aring <aahringo@redhat.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ include/net/ieee802154_netdev.h | 12 +++++++++---
+ 1 file changed, 9 insertions(+), 3 deletions(-)
+
+--- a/include/net/ieee802154_netdev.h
++++ b/include/net/ieee802154_netdev.h
+@@ -193,21 +193,27 @@ static inline int
+ ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 *daddr, int len)
+ {
+ struct ieee802154_addr_sa *sa;
++ int ret = 0;
+
+ sa = &daddr->addr;
+ if (len < IEEE802154_MIN_NAMELEN)
+ return -EINVAL;
+ switch (sa->addr_type) {
++ case IEEE802154_ADDR_NONE:
++ break;
+ case IEEE802154_ADDR_SHORT:
+ if (len < IEEE802154_NAMELEN_SHORT)
+- return -EINVAL;
++ ret = -EINVAL;
+ break;
+ case IEEE802154_ADDR_LONG:
+ if (len < IEEE802154_NAMELEN_LONG)
+- return -EINVAL;
++ ret = -EINVAL;
++ break;
++ default:
++ ret = -EINVAL;
+ break;
+ }
+- return 0;
++ return ret;
+ }
+
+ static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,