Revert "net/ieee802154: reject zero-sized raw_sendmsg()"

[ Upstream commit 2eb2756f6c9e9621e022d78321ce40a62c4520b5 ]

This reverts commit 3a4d061c699bd3eedc80dc97a4b2a2e1af83c6f5.

There is a v2 which does return zero if zero length is given.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20221005014750.3685555-1-aahringo@redhat.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
index f160cfc..fd5862f 100644 (file)
--- a/net/ieee802154/socket.c
+++ b/net/ieee802154/socket.c
@@ -251,9 +251,6 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
                return -EOPNOTSUPP;
        }
 
-       if (!size)
-               return -EINVAL;
-
        lock_sock(sk);
        if (!sk->sk_bound_dev_if)
                dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154);