From: Dan Carpenter <dan.carpenter@oracle.com>
To: Felix Fietkau <nbd@nbd.name>, Nelson Chang <nelson.chang@mediatek.com>
Cc: John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
netdev@vger.kernel.org, linux-mediatek@lists.infradead.org,
kernel-janitors@vger.kernel.org
Subject: [PATCH net] net: ethernet: mtk_eth_soc: out of bounds read in mtk_hwlro_get_fdir_entry()
Date: Thu, 26 May 2022 11:02:42 +0300 [thread overview]
Message-ID: <Yo80IuC/PRv7vF5m@kili> (raw)
The "fsp->location" variable comes from user via ethtool_get_rxnfc().
Check that it is valid to prevent an out of bounds read.
Fixes: 7aab747e5563 ("net: ethernet: mediatek: add ethtool functions to configure RX flows of HW LRO")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index a9d4fd8945bb..b3b3c079a0fa 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2212,6 +2212,9 @@ static int mtk_hwlro_get_fdir_entry(struct net_device *dev,
struct ethtool_rx_flow_spec *fsp =
(struct ethtool_rx_flow_spec *)&cmd->fs;
+ if (fsp->location >= ARRAY_SIZE(mac->hwlro_ip))
+ return -EINVAL;
+
/* only tcp dst ipv4 is meaningful, others are meaningless */
fsp->flow_type = TCP_V4_FLOW;
fsp->h_u.tcp_ip4_spec.ip4dst = ntohl(mac->hwlro_ip[fsp->location]);
--
2.35.1
next reply other threads:[~2022-05-26 8:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-26 8:02 Dan Carpenter [this message]
2022-05-27 7:10 ` [PATCH net] net: ethernet: mtk_eth_soc: out of bounds read in mtk_hwlro_get_fdir_entry() patchwork-bot+netdevbpf
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