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authorYang Yingliang <yangyingliang@huawei.com>2021-08-31 16:40:18 +0800
committerDavid S. Miller <davem@davemloft.net>2021-08-31 12:08:42 +0100
commita39ff4a47f3e1da3b036817ef436b1a9be10783a (patch)
tree8fef5e025d7d91f927d5ddd9b1c65e1ccb0ea37d
parent464a57281f29afc202905b456b0cb8bc729b383a (diff)
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 <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/wiznet/w5100.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c
index 811815f8cd3b..f974e70a82e8 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

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