| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 74/74] net: w5100: check return value after calling platform_get_resource() | Date | Thu, 9 Sep 2021 07:57:26 -0400 |
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From: Yang Yingliang <yangyingliang@huawei.com>
[ Upstream commit a39ff4a47f3e1da3b036817ef436b1a9be10783a ]
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> --- 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 d8ba512f166a..41040756307a 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -1059,6 +1059,8 @@ 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 -- 2.30.2
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