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 F08A73925B for ; Wed, 7 Jun 2023 20:23:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16F7DC433D2; Wed, 7 Jun 2023 20:23:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686169426; bh=xrrrxnSc1CzCpNxQ8lD9U1mfhyromHV+oKK88IbaZNc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lLIT6Fws1BwjI+ay5pMQk6PTCvaWTnIsSaacDnvWIPoj8itQnJ0Sp+6lpx9lfP99n qxCoAyO/IMOhcCGYHciecfQAVIuTtoOQgHcevJ0eJVZ9eemtQjGw9zBB9PDPxw8xpQ hmmfN+NAu5DdniB510qZNYMt0vVKfPIkQ5nZ6eeQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiumei Mu , Xin Long , Simon Horman , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.3 077/286] rtnetlink: add the missing IFLA_GRO_ tb check in validate_linkmsg Date: Wed, 7 Jun 2023 22:12:56 +0200 Message-ID: <20230607200925.596220486@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230607200922.978677727@linuxfoundation.org> References: <20230607200922.978677727@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Xin Long [ Upstream commit 65d6914e253f3d83b724a9bbfc889ae95711e512 ] This fixes the issue that dev gro_max_size and gso_ipv4_max_size can be set to a huge value: # ip link add dummy1 type dummy # ip link set dummy1 gro_max_size 4294967295 # ip -d link show dummy1 dummy addrgenmode eui64 ... gro_max_size 4294967295 Fixes: 0fe79f28bfaf ("net: allow gro_max_size to exceed 65536") Fixes: 9eefedd58ae1 ("net: add gso_ipv4_max_size and gro_ipv4_max_size per device") Reported-by: Xiumei Mu Signed-off-by: Xin Long Reviewed-by: Simon Horman Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/core/rtnetlink.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 7094569009b14..f235cc6832767 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2396,11 +2396,23 @@ static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[], return -EINVAL; } + if (tb[IFLA_GRO_MAX_SIZE] && + nla_get_u32(tb[IFLA_GRO_MAX_SIZE]) > GRO_MAX_SIZE) { + NL_SET_ERR_MSG(extack, "too big gro_max_size"); + return -EINVAL; + } + if (tb[IFLA_GSO_IPV4_MAX_SIZE] && nla_get_u32(tb[IFLA_GSO_IPV4_MAX_SIZE]) > dev->tso_max_size) { NL_SET_ERR_MSG(extack, "too big gso_ipv4_max_size"); return -EINVAL; } + + if (tb[IFLA_GRO_IPV4_MAX_SIZE] && + nla_get_u32(tb[IFLA_GRO_IPV4_MAX_SIZE]) > GRO_MAX_SIZE) { + NL_SET_ERR_MSG(extack, "too big gro_ipv4_max_size"); + return -EINVAL; + } } if (tb[IFLA_AF_SPEC]) { -- 2.39.2