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Commit 76bebc93 authored by Yang Yingliang's avatar Yang Yingliang Committed by Greg Kroah-Hartman
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net: w5100: check return value after calling platform_get_resource() 



[ Upstream commit a39ff4a47f3e1da3b036817ef436b1a9be10783a ]

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 3179dd79

drivers/net/ethernet/wiznet/w5100.c

+2 −0
Original line number Diff line number Diff line
@@ -1052,6 +1052,8 @@ 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