On 02/11/2022 04:27, Eric Dumazet wrote: <snip> > I do not think the bug is there. > > Most likely tun driver is buggy. <snip> >> @@ -6471,6 +6481,7 @@ void __netif_napi_del(struct napi_struct *napi) >> list_del_rcu(&napi->dev_list); >> napi_free_frags(napi); >> >> + flush_rx_list(napi); But maybe it makes sense to put a WARN_ON_ONCE(!list_empty(&napi->rx_list)) here, to catch such buggy drivers sooner. WDYT? -ed
