rxrpc: Fix error handling in rxgk_extract_token()

Fix a missing bit of error handling in rxgk_extract_token(): in the event
that rxgk_decrypt_skb() returns -ENOMEM, it should just return that rather
than continuing on (for anything else, it generates an abort).

Fixes: 64863f4 ("rxrpc: Fix unhandled errors in rxgk_verify_packet_integrity()")
Closes: https://sashiko.dev/#/patchset/[email protected]
Signed-off-by: David Howells <[email protected]>
cc: Marc Dionne <[email protected]>
cc: Jeffrey Altman <[email protected]>
cc: Simon Horman <[email protected]>
cc: [email protected]
cc: [email protected]
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: dhowells

net/rxrpc/rxgk_app.c

@@ -245,6 +245,7 @@ int rxgk_extract_token(struct rxrpc_connection *conn, struct sk_buff *skb,
 		if (ret != -ENOMEM)
 			return rxrpc_abort_conn(conn, skb, ec, ret,
 						rxgk_abort_resp_tok_dec);
+		return ret;
 	}
 
 	ret = conn->security->default_decode_ticket(conn, skb, ticket_offset,