From: Yang Yingliang <yangyingliang@xxxxxxxxxx> [ 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@xxxxxxxxxx> Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 fca9da1b1363..72fad2a63c62 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -414,6 +414,10 @@ 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)); -- 2.30.2