stable inclusion from linux-4.19.198 commit 3d4ba2600616a7c5e6b44f2319a808c465475c0f
--------------------------------
[ Upstream commit 20f1932e2282c58cb5ac59517585206cf5b385ae ]
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 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/micrel/ks8842.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c index e3d7c74d47bb0..5282c5754ac17 100644 --- a/drivers/net/ethernet/micrel/ks8842.c +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -1150,6 +1150,10 @@ static int ks8842_probe(struct platform_device *pdev) unsigned i;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!iomem) { + dev_err(&pdev->dev, "Invalid resource\n"); + return -EINVAL; + } if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) goto err_mem_region;