From cbe867685386af1f0a2648f5279f6e4c74bfd17f Mon Sep 17 00:00:00 2001 From: Hui Tang Date: Thu, 17 Nov 2022 16:40:32 +0800 Subject: net: mvpp2: fix possible invalid pointer dereference It will cause invalid pointer dereference to priv->cm3_base behind, if PTR_ERR(priv->cm3_base) in mvpp2_get_sram(). Fixes: e54ad1e01c00 ("net: mvpp2: add CM3 SRAM memory map") Signed-off-by: Hui Tang Link: https://lore.kernel.org/r/20221117084032.101144-1-tanghui20@huawei.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/net/ethernet/marvell/mvpp2') diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index eb0fb8128096..b399bdb1ca36 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -7350,6 +7350,7 @@ static int mvpp2_get_sram(struct platform_device *pdev, struct mvpp2 *priv) { struct resource *res; + void __iomem *base; res = platform_get_resource(pdev, IORESOURCE_MEM, 2); if (!res) { @@ -7360,9 +7361,12 @@ static int mvpp2_get_sram(struct platform_device *pdev, return 0; } - priv->cm3_base = devm_ioremap_resource(&pdev->dev, res); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); - return PTR_ERR_OR_ZERO(priv->cm3_base); + priv->cm3_base = base; + return 0; } static int mvpp2_probe(struct platform_device *pdev) -- cgit v1.2.3