From a39ff4a47f3e1da3b036817ef436b1a9be10783a Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Tue, 31 Aug 2021 16:40:18 +0800 Subject: [PATCH] net: w5100: check return value after calling platform_get_resource() It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang Signed-off-by: David S. Miller --- drivers/net/ethernet/wiznet/w5100.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c index 811815f..f974e70 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -1047,6 +1047,8 @@ static int w5100_mmio_probe(struct platform_device *pdev) mac_addr = data->mac_addr; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) + return -EINVAL; if (resource_size(mem) < W5100_BUS_DIRECT_SIZE) ops = &w5100_mmio_indirect_ops; else -- 2.7.4