Messages in this thread Patch in this message | | | From | Hui Tang <> | Subject | [PATCH net v3] net: mvpp2: fix possible invalid pointer dereference | Date | Wed, 16 Nov 2022 10:06:17 +0800 |
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It will cause invalid pointer dereference to priv->cm3_base behind, if PTR_ERR(priv->cm3_base) in mvpp2_get_sram().
Fixes: a59d354208a7 ("net: mvpp2: enable global flow control") Signed-off-by: Hui Tang <tanghui20@huawei.com> --- v1 -> v2: patch title include target v2 -> v3: keep priv->cm3_base NULL if devm_ioremap_resource() failed --- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index d98f7e9a480e..9c3fbb153b5b 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -7349,6 +7349,7 @@ 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) { @@ -7359,9 +7360,11 @@ 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(priv->cm3_base)) + priv->cm3_base = base; - return PTR_ERR_OR_ZERO(priv->cm3_base); + return PTR_ERR_OR_ZERO(base); } static int mvpp2_probe(struct platform_device *pdev) -- 2.17.1
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