From patchwork Tue Mar 14 10:49:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13174038 X-Patchwork-Delegate: kuba@kernel.org 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 2BD72C7618A for ; Tue, 14 Mar 2023 10:50:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229909AbjCNKuj (ORCPT ); Tue, 14 Mar 2023 06:50:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230094AbjCNKu0 (ORCPT ); Tue, 14 Mar 2023 06:50:26 -0400 Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 783E296F0D; Tue, 14 Mar 2023 03:50:02 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R171e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045192;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=15;SR=0;TI=SMTPD_---0Vds07MK_1678790982; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0Vds07MK_1678790982) by smtp.aliyun-inc.com; Tue, 14 Mar 2023 18:49:42 +0800 From: Xuan Zhuo To: netdev@vger.kernel.org Cc: "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Xuan Zhuo , Heng Qi , virtualization@lists.linux-foundation.org, bpf@vger.kernel.org Subject: [PATCH net v1 2/2] virtio_net: free xdp shinfo frags when build_skb_from_xdp_buff() fails Date: Tue, 14 Mar 2023 18:49:39 +0800 Message-Id: <20230314104939.67212-3-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20230314104939.67212-1-xuanzhuo@linux.alibaba.com> References: <20230314104939.67212-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: b2016341b15d Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org build_skb_from_xdp_buff() may return NULL, in this case we need to free the frags of xdp shinfo. 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: