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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDF7EC433F5 for ; Tue, 9 Nov 2021 01:22:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A1A7A61058 for ; Tue, 9 Nov 2021 01:22:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243232AbhKIBXP (ORCPT ); Mon, 8 Nov 2021 20:23:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:46222 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243191AbhKIBTd (ORCPT ); Mon, 8 Nov 2021 20:19:33 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6EFC661B02; Tue, 9 Nov 2021 01:07:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636420074; bh=ZAXKUZhFRF1nagWsA+OWUgnFNSdRaSN6Mqo5cD9laDo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pHS9wo9dRTByNIzHBekGbpg6D2bGm2v6IGd40JtHnAbOuOWN4T0J4NFfsIONqiH32 B9mUX6tDSMNDRT5yUMvnC79wtW5Q7gUMINhfMogsqgD17KHFwLu96kvEnY5u2dKfwz S15IkRZVDIZXNfUxdiYxqEGeBrdN2d/PUcbWyCKtRvr3vBLzdytgLT7B6z30Wb+Ml3 m5QClqAvxOxmMdiR17kJwXuV2TfOIuoAU6k7v2DpN1do7jmaT3EGoSrZWrHJlJQ4Sd 7japqRpZwK635R5Gb5QntLv3RrtRhYxZ70MvIOr+y7TfnA7LXk1wFSnrXbwawvKv8w 7b35l1WfOhauQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Stephen Suryaputra , Antonio Quartulli , Jakub Kicinski , Sasha Levin , davem@davemloft.net, yoshfuji@linux-ipv6.org, dsahern@kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 34/39] gre/sit: Don't generate link-local addr if addr_gen_mode is IN6_ADDR_GEN_MODE_NONE Date: Mon, 8 Nov 2021 20:06:44 -0500 Message-Id: <20211109010649.1191041-34-sashal@kernel.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211109010649.1191041-1-sashal@kernel.org> References: <20211109010649.1191041-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephen Suryaputra [ Upstream commit 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a ] When addr_gen_mode is set to IN6_ADDR_GEN_MODE_NONE, the link-local addr should not be generated. But it isn't the case for GRE (as well as GRE6) and SIT tunnels. Make it so that tunnels consider the addr_gen_mode, especially for IN6_ADDR_GEN_MODE_NONE. Do this in add_v4_addrs() to cover both GRE and SIT only if the addr scope is link. Signed-off-by: Stephen Suryaputra Acked-by: Antonio Quartulli Link: https://lore.kernel.org/r/20211020200618.467342-1-ssuryaextr@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/ipv6/addrconf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index e47d5047d5373..178a3b26f9d2c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2996,6 +2996,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4); if (idev->dev->flags&IFF_POINTOPOINT) { + if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE) + return; + addr.s6_addr32[0] = htonl(0xfe800000); scope = IFA_LINK; plen = 64; -- 2.33.0