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 X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE562C433DF for ; Mon, 19 Oct 2020 12:25:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 790A122268 for ; Mon, 19 Oct 2020 12:25:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="sWpwlHAU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727204AbgJSMZv (ORCPT ); Mon, 19 Oct 2020 08:25:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727199AbgJSMZv (ORCPT ); Mon, 19 Oct 2020 08:25:51 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A991C0613CE; Mon, 19 Oct 2020 05:25:51 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id j8so5620504pjy.5; Mon, 19 Oct 2020 05:25:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=jGFHohiLMKmOcbBELvAHtKl6/eKf2Rs4EotDZ5VjkE0=; b=sWpwlHAU56NfFriE3E2sIUTxcft80+7U4FjmNnOj/UKHRvVW0KANSazqWybWpeAuN7 QTS+Vlo9zTfxgVRuV6aTMCw4YVQTWhZlZTxxyFpfVVS7xLhRoO6RHSftr84qgKWhjXVf Ebg4LEQ3fs5Su3sjty0vhfBnTTjx4cQUkX/PS8UaO7XMrvkqIePoLGqa+PvBZI9Syzo2 rkEL5pK0ARJAHGId+Jhsqy0K/XGHwNmhseS+6VWcWEcunAW/NuM2E0Lj4NF/9fFptFgW Z9q55e55aoz4yAGj3NvywnyxPV9xnr8FcGrxsyYwVEqBcd/hEi5j3UBqrmiQrsjJ+s39 wGsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=jGFHohiLMKmOcbBELvAHtKl6/eKf2Rs4EotDZ5VjkE0=; b=WUhQzQPrE7YP+7S9GfCfVXazASVI1wgVlmfeuB7ic/iMtDqVLXMJJJfP4UjH0P/fjK GHxIhkBRnLOh8TMhB/YlX5W5Bszn9XGeYZNSernMSOCO1eeXh8dPgldzxgVPzwt3vofE CLTNw2FHQK0SAg6jcZTQUj4tUb5LEM5qePgy1tbKJjbt0Z8Y0tAC2f0mY0ioeQEMYCaF viMuRO7Qb1Z3TxvKxeWdIr2nLeI/0nqPcncJIdyHSwvRgpGtTMG9sKLWSAJr3GvwWq6Z q0zgLdnt43WDAot1Hj2yNVOMQqDbAGDUTKSA3eRFxR2SSE8Kp9y1ZOz6O9VEB/HybGem QqjA== X-Gm-Message-State: AOAM532ItEAHIZ/PlrcHWTPLsVypxgqvkEJhL7W5ePnpoUoKo/iOFboz 0cfBJhcpCSKJTNnndZgh50FQv8sJxX0= X-Google-Smtp-Source: ABdhPJywoHkGOh1UZ4H+46xwoc824w3L1ii9tB/MCA8M5yIc/mSvLVnXmEqotHHRyGBk4W7DuLqwbw== X-Received: by 2002:a17:902:708a:b029:d4:cf7c:6c59 with SMTP id z10-20020a170902708ab02900d4cf7c6c59mr16795320plk.52.1603110350282; Mon, 19 Oct 2020 05:25:50 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id ga19sm11721302pjb.3.2020.10.19.05.25.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 19 Oct 2020 05:25:49 -0700 (PDT) From: Xin Long To: network dev , linux-sctp@vger.kernel.org Cc: Marcelo Ricardo Leitner , Neil Horman , Michael Tuexen , davem@davemloft.net, gnault@redhat.com, pabeni@redhat.com, willemdebruijn.kernel@gmail.com Subject: [PATCHv4 net-next 01/16] udp: check udp sock encap_type in __udp_lib_err Date: Mon, 19 Oct 2020 20:25:18 +0800 Message-ID: <71b3af0fb347f27b5c3bf846dbd34485d9f80af0.1603110316.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-sctp@vger.kernel.org Message-ID: <20201019122518.kPT5zOKwepmUwUhu_0xr7gLhL_0B5ZoJqiqFPPnc9gs@z> There is a chance that __udp4/6_lib_lookup() returns a udp encap sock in __udp_lib_err(), like the udp encap listening sock may use the same port as remote encap port, in which case it should go to __udp4/6_lib_err_encap() for more validation before processing the icmp packet. This patch is to check encap_type in __udp_lib_err() for the further validation for a encap sock. Signed-off-by: Xin Long --- net/ipv4/udp.c | 2 +- net/ipv6/udp.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 09f0a23..ca04a8a 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -702,7 +702,7 @@ int __udp4_lib_err(struct sk_buff *skb, u32 info, struct udp_table *udptable) sk = __udp4_lib_lookup(net, iph->daddr, uh->dest, iph->saddr, uh->source, skb->dev->ifindex, inet_sdif(skb), udptable, NULL); - if (!sk) { + if (!sk || udp_sk(sk)->encap_type) { /* No socket for error: try tunnels before discarding */ sk = ERR_PTR(-ENOENT); if (static_branch_unlikely(&udp_encap_needed_key)) { diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 29d9691..cde9b88 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -560,7 +560,7 @@ int __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, sk = __udp6_lib_lookup(net, daddr, uh->dest, saddr, uh->source, inet6_iif(skb), inet6_sdif(skb), udptable, NULL); - if (!sk) { + if (!sk || udp_sk(sk)->encap_type) { /* No socket for error: try tunnels before discarding */ sk = ERR_PTR(-ENOENT); if (static_branch_unlikely(&udpv6_encap_needed_key)) { -- 2.1.0