From nobody Fri Dec 19 20:14:22 2025 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 14FB022C640; Sun, 24 Mar 2024 23:51:20 +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=1711324281; cv=none; b=do8qpehv9UCmeW3TbHmwGWBO3arymnE+QV4CxhAzNijo948WgkLRhIgj3pq7NxmDUaKKfDB/Pzn/Fe4wpQjgyQfqPAB2Lx15TO3KyKUEhGNjlBVpYBKysxlXiZnutvZTEiCdGtKd/jol5YwUrVrvDoKwzD6Dyqu6BcK5ulk/Aa0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711324281; c=relaxed/simple; bh=qC98P5/GrlglsIhfMpYTW+QmAAft/+8E9Zd4Pkn3EbQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZM8ayQGUbkA65O9r77m2S11bSxvXQG3wMdU9NJGdB+b1QpW4XvulRLwrTIXQscjdh8MFTvpALEgQomL5JTNnOf8RO7CWAUuqavI+WPR5oadePFU/sKXe2ZapjXBs/iZPWPVYkLZ9xt1hWT7CoR9x3mRJvtwo4S7ni1MMDkc2fVU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VK9yMqPi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VK9yMqPi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5CA4C43394; Sun, 24 Mar 2024 23:51:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711324279; bh=qC98P5/GrlglsIhfMpYTW+QmAAft/+8E9Zd4Pkn3EbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VK9yMqPiZHuPUHmlf7Tn/nk5WGN32LN0GFvu8UIc8J6rMMHeOTffiJEYC/ZqdrX0w nY9g646qK6s2UoIaFM43tOSQQ9jYm0CFJEMRC8PoOf8vldpX5+enPl2gW6mf8jfCLM kMXdsN8SAA1Ff/zxMr+aSmDD/6L5ux3waUid+EXek2bL1sSB2jCC5UegOs2CKiC9wy /SUVKF2fiUcYugwO3prxqXVCiYKAulW27tHz/65T19C56o3WuHrrQXVb8dmWYV9sAI WdL7vgH0CJJGcd61t72+8zuDSh9zr+m5DWSS8b0ib3Sp7BpXECb+OcA2eqpizkP7CQ oyeiuVsHZMvgg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Shiming Cheng , Lena Wang , David Ahern , "David S . Miller" , Sasha Levin Subject: [PATCH 4.19 057/148] ipv6: fib6_rules: flush route cache when rule is changed Date: Sun, 24 Mar 2024 19:48:41 -0400 Message-ID: <20240324235012.1356413-58-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324235012.1356413-1-sashal@kernel.org> References: <20240324235012.1356413-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Shiming Cheng [ Upstream commit c4386ab4f6c600f75fdfd21143f89bac3e625d0d ] When rule policy is changed, ipv6 socket cache is not refreshed. The sock's skb still uses a outdated route cache and was sent to a wrong interface. To avoid this error we should update fib node's version when rule is changed. Then skb's route will be reroute checked as route cache version is already different with fib node version. The route cache is refreshed to match the latest rule. Fixes: 101367c2f8c4 ("[IPV6]: Policy Routing Rules") Signed-off-by: Shiming Cheng Signed-off-by: Lena Wang Reviewed-by: David Ahern Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ipv6/fib6_rules.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c index f590446595d8b..1913801f4273c 100644 --- a/net/ipv6/fib6_rules.c +++ b/net/ipv6/fib6_rules.c @@ -437,6 +437,11 @@ static size_t fib6_rule_nlmsg_payload(struct fib_rule = *rule) + nla_total_size(16); /* src */ } =20 +static void fib6_rule_flush_cache(struct fib_rules_ops *ops) +{ + rt_genid_bump_ipv6(ops->fro_net); +} + static const struct fib_rules_ops __net_initconst fib6_rules_ops_template = =3D { .family =3D AF_INET6, .rule_size =3D sizeof(struct fib6_rule), @@ -449,6 +454,7 @@ static const struct fib_rules_ops __net_initconst fib6_= rules_ops_template =3D { .compare =3D fib6_rule_compare, .fill =3D fib6_rule_fill, .nlmsg_payload =3D fib6_rule_nlmsg_payload, + .flush_cache =3D fib6_rule_flush_cache, .nlgroup =3D RTNLGRP_IPV6_RULE, .policy =3D fib6_rule_policy, .owner =3D THIS_MODULE, --=20 2.43.0