From 4253e6e2b795a18ab534adcd5c313d3fc4150975 Mon Sep 17 00:00:00 2001 Message-Id: <4253e6e2b795a18ab534adcd5c313d3fc4150975.1662332102.git.lorenzo@kernel.org> In-Reply-To: <2a60545635c2705312299384f4e9fec2f2a3acd6.1662332102.git.lorenzo@kernel.org> References: <2a60545635c2705312299384f4e9fec2f2a3acd6.1662332102.git.lorenzo@kernel.org> From: Lorenzo Bianconi Date: Mon, 5 Sep 2022 00:48:52 +0200 Subject: [PATCH net-next 3/6] net: ethernet: mtk_eth_soc: check max allowed value in mtk_ppe_check_skb Check theoretical OOB accesses in mtk_ppe_check_skb routine Signed-off-by: Lorenzo Bianconi --- drivers/net/ethernet/mediatek/mtk_ppe.h | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/ethernet/mediatek/mtk_ppe.h +++ b/drivers/net/ethernet/mediatek/mtk_ppe.h @@ -294,6 +294,9 @@ mtk_ppe_check_skb(struct mtk_ppe *ppe, s if (!ppe) return; + if (hash > MTK_PPE_HASH_MASK) + return; + now = (u16)jiffies; diff = now - ppe->foe_check_time[hash]; if (diff < HZ / 10)