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From 603ea5e7ffa73c7fac07d8713d97285990695213 Mon Sep 17 00:00:00 2001
From: Yan Cangang <nalanzeyu@gmail.com>
Date: Sun, 20 Nov 2022 13:52:59 +0800
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix memory leak in error path
In mtk_ppe_init(), when dmam_alloc_coherent() or devm_kzalloc() failed,
the rhashtable ppe->l2_flows isn't destroyed. Fix it.
In mtk_probe(), when mtk_ppe_init() or mtk_eth_offload_init() or
register_netdev() failed, have the same problem. Fix it.
Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
Signed-off-by: Yan Cangang <nalanzeyu@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 9 +++++----
drivers/net/ethernet/mediatek/mtk_ppe.c | 19 +++++++++++++++++--
drivers/net/ethernet/mediatek/mtk_ppe.h | 1 +
3 files changed, 23 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4090,13 +4090,13 @@ static int mtk_probe(struct platform_dev
eth->soc->offload_version, i);
if (!eth->ppe[i]) {
err = -ENOMEM;
- goto err_deinit_mdio;
+ goto err_deinit_ppe;
}
}
err = mtk_eth_offload_init(eth);
if (err)
- goto err_deinit_mdio;
+ goto err_deinit_ppe;
}
for (i = 0; i < MTK_MAX_DEVS; i++) {
@@ -4106,7 +4106,7 @@ static int mtk_probe(struct platform_dev
err = register_netdev(eth->netdev[i]);
if (err) {
dev_err(eth->dev, "error bringing up device\n");
- goto err_deinit_mdio;
+ goto err_deinit_ppe;
} else
netif_info(eth, probe, eth->netdev[i],
"mediatek frame engine at 0x%08lx, irq %d\n",
@@ -4126,7 +4126,8 @@ static int mtk_probe(struct platform_dev
return 0;
-err_deinit_mdio:
+err_deinit_ppe:
+ mtk_ppe_deinit(eth);
mtk_mdio_cleanup(eth);
err_free_dev:
mtk_free_dev(eth);
--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
@@ -743,7 +743,7 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_
MTK_PPE_ENTRIES * soc->foe_entry_size,
&ppe->foe_phys, GFP_KERNEL);
if (!foe)
- return NULL;
+ goto err_free_l2_flows;
ppe->foe_table = foe;
@@ -751,11 +751,26 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_
sizeof(*ppe->foe_flow);
ppe->foe_flow = devm_kzalloc(dev, foe_flow_size, GFP_KERNEL);
if (!ppe->foe_flow)
- return NULL;
+ goto err_free_l2_flows;
mtk_ppe_debugfs_init(ppe, index);
return ppe;
+
+err_free_l2_flows:
+ rhashtable_destroy(&ppe->l2_flows);
+ return NULL;
+}
+
+void mtk_ppe_deinit(struct mtk_eth *eth)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(eth->ppe); i++) {
+ if (!eth->ppe[i])
+ return;
+ rhashtable_destroy(ð->ppe[i]->l2_flows);
+ }
}
static void mtk_ppe_init_foe_table(struct mtk_ppe *ppe)
--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
@@ -304,6 +304,7 @@ struct mtk_ppe {
struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth, void __iomem *base,
int version, int index);
+void mtk_ppe_deinit(struct mtk_eth *eth);
void mtk_ppe_start(struct mtk_ppe *ppe);
int mtk_ppe_stop(struct mtk_ppe *ppe);
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