stable inclusion from linux-4.19.198 commit 09846c2990d91736566395e6b01674b2258cd702 -------------------------------- [ Upstream commit 74325bf0104573c6dfce42837139aeef3f34be76 ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/net/ethernet/broadcom/genet/bcmmii.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index a5049d637791d..494601c39b847 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -428,6 +428,10 @@ static int bcmgenet_mii_register(struct bcmgenet_priv *priv) int id, ret; pres = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!pres) { + dev_err(&pdev->dev, "Invalid resource\n"); + return -EINVAL; + } memset(&res, 0, sizeof(res)); memset(&ppd, 0, sizeof(ppd)); -- 2.25.1