From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 38EF5233D85; Mon, 10 Mar 2025 18:21:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741630913; cv=none; b=grZyshNTA7dMMkae9sdej5WRQ3RxrHyzBlNEAtPKcRNy/y9jfbIRLMPr3TEuRIqEFSpqXDZLCHxiOOxRxMGABQ4bK8m8EuK4eEyyqO5pzAMy/XkX6vjA7ZfoKyPw2k73SRlVwY6ihStTagtI6rhEHLSBpE9dHl5AXs0DerSfYDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741630913; c=relaxed/simple; bh=fOp5Vk/m3pIM6B/yIpALWID6lpPgs13qxiVjLJ4FXE0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=jMsYGeLhQnzwAOb6VjZUiNVASRDmPtIk5FgXtH1YfmN7GF1VeiD4eVfKKT1FecbFN4XAH7GF9D07y1iAH2fENTwmuu4bj1PTmQ9orcSHtf2nLeeP1VsQWcS6RakR2XKHHJp7ECdCPfojKdLixtrMRogO9lc2RiOOmukYC7mnDsU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GinekEvK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="GinekEvK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B8B5C4CEE5; Mon, 10 Mar 2025 18:21:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1741630912; bh=fOp5Vk/m3pIM6B/yIpALWID6lpPgs13qxiVjLJ4FXE0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GinekEvKlLk143Bs/gM1ShkC2sQkqEVAv28GGJ+q8RjJrEtMSkzFe3XpBTCfoORWp Z34WIq4XJzxrmXThkGT9yFMoFnjvAlych1ClATG13VmcKbLxzwiyBCE/uTYEGuFSOv VGwQJrtHGfI9MgEmrAKHqyviKAcpC9Km/LAiCNKM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tom Herbert , Justin Iurman , Paolo Abeni , Sasha Levin Subject: [PATCH 5.15 577/620] net: ipv6: fix dst ref loop in ila lwtunnel Date: Mon, 10 Mar 2025 18:07:03 +0100 Message-ID: <20250310170608.315916521@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250310170545.553361750@linuxfoundation.org> References: <20250310170545.553361750@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Justin Iurman [ Upstream commit 0e7633d7b95b67f1758aea19f8e85621c5f506a3 ] This patch follows commit 92191dd10730 ("net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels") and, on a second thought, the same patch is also needed for ila (even though the config that triggered the issue was pathological, but still, we don't want that to happen). Fixes: 79ff2fc31e0f ("ila: Cache a route to translated address") Cc: Tom Herbert Signed-off-by: Justin Iurman Link: https://patch.msgid.link/20250304181039.35951-1-justin.iurman@uliege.be Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- net/ipv6/ila/ila_lwt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ila/ila_lwt.c b/net/ipv6/ila/ila_lwt.c index 9d37f7164e732..6d37dda3d26fc 100644 --- a/net/ipv6/ila/ila_lwt.c +++ b/net/ipv6/ila/ila_lwt.c @@ -88,7 +88,8 @@ static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb) goto drop; } - if (ilwt->connected) { + /* cache only if we don't create a dst reference loop */ + if (ilwt->connected && orig_dst->lwtstate != dst->lwtstate) { local_bh_disable(); dst_cache_set_ip6(&ilwt->dst_cache, dst, &fl6.saddr); local_bh_enable(); -- 2.39.5