From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B0017C6FD1C for ; Tue, 14 Mar 2023 09:12:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229765AbjCNJMm (ORCPT ); Tue, 14 Mar 2023 05:12:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229540AbjCNJMj (ORCPT ); Tue, 14 Mar 2023 05:12:39 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF6C4984C8 for ; Tue, 14 Mar 2023 02:11:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678785104; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=T7LMCjgV3148z08653yeBgRUZqj0U6BVbsGsCqJdIQw=; b=UUmXT6TdicxGcS/N2oLsddDc+beSuRQlkIWlJFwTPtLLM9p/POYSUTGgKM1B2fd7g7akvj gcHm+MSFmW5IeNZ65v+xF6s1ysODHCtaiOjbrHX5wQzCXCBkqU0lsl1UCDZNzdGjoBC9Zs z1QHEmXZWxd1+qV/OdXrKdvCHmQ1Oek= Received: from mail-ed1-f72.google.com (mail-ed1-f72.google.com [209.85.208.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-505-pp92jQavPBuQBdyJYLZZuw-1; Tue, 14 Mar 2023 05:11:42 -0400 X-MC-Unique: pp92jQavPBuQBdyJYLZZuw-1 Received: by mail-ed1-f72.google.com with SMTP id en6-20020a056402528600b004fa01232e6aso12502791edb.16 for ; Tue, 14 Mar 2023 02:11:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678785099; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=T7LMCjgV3148z08653yeBgRUZqj0U6BVbsGsCqJdIQw=; b=Cy2xQ6BwErNbA7tCrcFxYH3u33O0ofvkBh81dCnW1I4nHsLZxl1DtVXx1srXpZ71Xn 4mbymiSG99l9Yst63c0UXOOdFUvKXqm3oEEdlekCnn0lKxE19SnWy90atajWWhGAMxli XKDQ466KbECq8Bqqi2bPCiSRqpSxsaC26fhd7m6eJOQpaQQ9cVBPvEu55YbnOUlwzc3r bPYcvdadOCbDYPHZNIaoTFwVCUR62ef94rBVTe94pDfquSn+IiWRqP0jpXmKL+tYfJX8 Zk2fRbBm2iqAqybjVlbXEmu8kEJZ9tgGCWCV/8+t/tldsLKEwPQBNKO5Bd6ErP+xS1nw 0aGQ== X-Gm-Message-State: AO0yUKWKH7Z6/0IAvQqGnxrr6XoK73zR1mSkx64Kbqkwaba3fpVtVOGo ectQKUrFqBLXta5HwD8xqAhWW93543FdhdnPnNoehq5UuovvVrsX+F3wEV7ICxRt+4FOYU0VerW LbODEcl79OkSf X-Received: by 2002:a17:907:746:b0:92b:ae6c:23e7 with SMTP id xc6-20020a170907074600b0092bae6c23e7mr1868573ejb.56.1678785099438; Tue, 14 Mar 2023 02:11:39 -0700 (PDT) X-Google-Smtp-Source: AK7set+bdi1ysk/4yWOK0bSSOg12ZBcLDKbIuHqp5BWiooRh0XX2E3g6+Wpi5yzgkrXZjiEs1t2Sbg== X-Received: by 2002:a17:907:746:b0:92b:ae6c:23e7 with SMTP id xc6-20020a170907074600b0092bae6c23e7mr1868546ejb.56.1678785099140; Tue, 14 Mar 2023 02:11:39 -0700 (PDT) Received: from redhat.com ([2a02:14f:1f7:4129:3ef9:ea05:f0ca:6b81]) by smtp.gmail.com with ESMTPSA id hd31-20020a170907969f00b0092d58e24e11sm356116ejc.137.2023.03.14.02.11.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Mar 2023 02:11:38 -0700 (PDT) Date: Tue, 14 Mar 2023 05:11:32 -0400 From: "Michael S. Tsirkin" To: Xuan Zhuo Cc: netdev@vger.kernel.org, Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Heng Qi , virtualization@lists.linux-foundation.org, bpf@vger.kernel.org Subject: Re: [PATCH net 2/2] virtio_net: free xdp shinfo frags when build_skb_from_xdp_buff() fails Message-ID: <20230314051049-mutt-send-email-mst@kernel.org> References: <20230314083901.40521-1-xuanzhuo@linux.alibaba.com> <20230314083901.40521-3-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230314083901.40521-3-xuanzhuo@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Tue, Mar 14, 2023 at 04:39:01PM +0800, Xuan Zhuo wrote: > build_skb_from_xdp_buff() may return NULL, on this > scene we need to free the frags of xdp shinfo. s/on this scene/in this case/ > > Fixes: fab89bafa95b ("virtio-net: support multi-buffer xdp") > Signed-off-by: Xuan Zhuo Acked-by: Michael S. Tsirkin > --- > drivers/net/virtio_net.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index 8ecf7a341d54..d36183be0481 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -1273,9 +1273,12 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, > > switch (act) { > case XDP_PASS: > + head_skb = build_skb_from_xdp_buff(dev, vi, &xdp, xdp_frags_truesz); > + if (!head_skb) > + goto err_xdp_frags; > + > if (unlikely(xdp_page != page)) > put_page(page); > - head_skb = build_skb_from_xdp_buff(dev, vi, &xdp, xdp_frags_truesz); > rcu_read_unlock(); > return head_skb; > case XDP_TX: > -- > 2.32.0.3.g01195cf9f