diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-04-12 12:24:19 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-13 12:24:20 +0100 |
| commit | 17a5f6a78dc7b8db385de346092d7d9f9dc24df6 (patch) | |
| tree | 746342fbc4d2f007828d9eb7829c12ecdd330baa | |
| parent | 2240514cb6441641111ac1fabab03e9df9972d7f (diff) | |
net: ethernet: mtk_eth_soc: use after free in __mtk_ppe_check_skb()
The __mtk_foe_entry_clear() function frees "entry" so we have to use
the _safe() version of hlist_for_each_entry() to prevent a use after
free.
Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_ppe.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe.c b/drivers/net/ethernet/mediatek/mtk_ppe.c index 282a1f34a88a..683f89f8e3b2 100644 --- a/drivers/net/ethernet/mediatek/mtk_ppe.c +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c @@ -600,6 +600,7 @@ void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash) struct mtk_foe_entry *hwe = &ppe->foe_table[hash]; struct mtk_flow_entry *entry; struct mtk_foe_bridge key = {}; + struct hlist_node *n; struct ethhdr *eh; bool found = false; u8 *tag; @@ -609,7 +610,7 @@ void __mtk_ppe_check_skb(struct mtk_ppe *ppe, struct sk_buff *skb, u16 hash) if (FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) == MTK_FOE_STATE_BIND) goto out; - hlist_for_each_entry(entry, head, list) { + hlist_for_each_entry_safe(entry, n, head, list) { if (entry->type == MTK_FLOW_TYPE_L2_SUBFLOW) { if (unlikely(FIELD_GET(MTK_FOE_IB1_STATE, hwe->ib1) == MTK_FOE_STATE_BIND)) |