openwrt/target/linux/generic/backport-5.15/728-v6.1-01-net-ethernet-mtk_eth_soc-fix-possible-memory-leak-in.patch

From b3d0d98179d62f9d55635a600679c4fa362baf8d Mon Sep 17 00:00:00 2001
From: Yang Yingliang <[email protected]>
Date: Mon, 17 Oct 2022 11:51:54 +0800
Subject: [PATCH 1/3] net: ethernet: mtk_eth_soc: fix possible memory leak in
 mtk_probe()

If mtk_wed_add_hw() has been called, mtk_wed_exit() needs be called
in error path or removing module to free the memory allocated in
mtk_wed_add_hw().

Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Yang Yingliang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -4006,19 +4006,23 @@ static int mtk_probe(struct platform_dev
 			eth->irq[i] = platform_get_irq(pdev, i);
 		if (eth->irq[i] < 0) {
 			dev_err(&pdev->dev, "no IRQ%d resource found\n", i);
-			return -ENXIO;
+			err = -ENXIO;
+			goto err_wed_exit;
 		}
 	}
 	for (i = 0; i < ARRAY_SIZE(eth->clks); i++) {
 		eth->clks[i] = devm_clk_get(eth->dev,
 					    mtk_clks_source_name[i]);
 		if (IS_ERR(eth->clks[i])) {
-			if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER)
-				return -EPROBE_DEFER;
+			if (PTR_ERR(eth->clks[i]) == -EPROBE_DEFER) {
+				err = -EPROBE_DEFER;
+				goto err_wed_exit;
+			}
 			if (eth->soc->required_clks & BIT(i)) {
 				dev_err(&pdev->dev, "clock %s not found\n",
 					mtk_clks_source_name[i]);
-				return -EINVAL;
+				err = -EINVAL;
+				goto err_wed_exit;
 			}
 			eth->clks[i] = NULL;
 		}
@@ -4029,7 +4033,7 @@ static int mtk_probe(struct platform_dev
 
 	err = mtk_hw_init(eth);
 	if (err)
-		return err;
+		goto err_wed_exit;
 
 	eth->hwlro = MTK_HAS_CAPS(eth->soc->caps, MTK_HWLRO);
 
@@ -4127,6 +4131,8 @@ err_free_dev:
 	mtk_free_dev(eth);
 err_deinit_hw:
 	mtk_hw_deinit(eth);
+err_wed_exit:
+	mtk_wed_exit();
 
 	return err;
 }
@@ -4146,6 +4152,7 @@ static int mtk_remove(struct platform_de
 		phylink_disconnect_phy(mac->phylink);
 	}
 
+	mtk_wed_exit();
 	mtk_hw_deinit(eth);
 
 	netif_napi_del(&eth->tx_napi);