From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
[ Upstream commit f27b405ef43319a3ceefc2123245201a63ed4e00 ]
Even if max hash configured in hw in mtk_ppe_hash_entry is
MTK_PPE_ENTRIES - 1, check theoretical OOB accesses in
mtk_ppe_check_skb routine
Fixes: c4f033d9e03e9 ("net: ethernet: mtk_eth_soc: rework hardware flow table management")
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/mediatek/mtk_ppe.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.h b/drivers/net/ethernet/mediatek/mtk_ppe.h
index 1f5cf1c9a9475..69ffce04d6306 100644
--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
@@ -293,6 +293,9 @@ mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash)
if (!ppe)
return;
+ if (hash > MTK_PPE_HASH_MASK)
+ return;
+
now = (u16)jiffies;
diff = now - ppe->foe_check_time[hash];
if (diff < HZ / 10)
--
2.35.1
