[bug report] rxrpc: Allow CHALLENGEs to the passed to the app for a RESPONSE

[Dan Carpenter]

Hello David Howells,

Commit 5800b1cf3fd8 ("rxrpc: Allow CHALLENGEs to the passed to the
app for a RESPONSE") from Apr 11, 2025 (linux-next), leads to the
following Smatch static checker warning:

	net/rxrpc/insecure.c:48 none_validate_challenge()
	warn: signedness bug returning '(-71)'

net/rxrpc/insecure.c
    45 static bool none_validate_challenge(struct rxrpc_connection *conn,
    46                                     struct sk_buff *skb)
    47 {
--> 48         return rxrpc_abort_conn(conn, skb, RX_PROTOCOL_ERROR, -EPROTO,

This is reversed.  It's returning true for failure instead of false.

    49                                 rxrpc_eproto_rxnull_challenge);
    50 }

regards,
dan carpenter