diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c index 9a41ec708aeb..aee977291d90 100644 --- a/net/rxrpc/conn_event.c +++ b/net/rxrpc/conn_event.c @@ -240,6 +240,33 @@ static void rxrpc_call_is_secure(struct rxrpc_call *call) rxrpc_notify_socket(call); } +static int rxrpc_verify_response(struct rxrpc_connection *conn, + struct sk_buff *skb) +{ + int ret; + + if (skb_cloned(skb)) { + /* Copy the packet if shared so that we can do in-place + * decryption. + */ + struct sk_buff *nskb = skb_copy(skb, GFP_NOFS); + + if (nskb) { + rxrpc_new_skb(nskb, rxrpc_skb_new_unshared); + ret = conn->security->verify_response(conn, nskb); + rxrpc_free_skb(nskb, rxrpc_skb_put_response_copy); + } else { + /* OOM - Drop the packet. */ + rxrpc_see_skb(skb, rxrpc_skb_see_unshare_nomem); + ret = -ENOMEM; + } + } else { + ret = conn->security->verify_response(conn, skb); + } + + return ret; +} + /* * connection-level Rx packet processor */ @@ -270,7 +297,7 @@ static int rxrpc_process_event(struct rxrpc_connection *conn, } spin_unlock_irq(&conn->state_lock); - ret = conn->security->verify_response(conn, skb); + ret = rxrpc_verify_response(conn, skb); if (ret < 0) return ret;