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| author | Yang Yingliang <yangyingliang@huawei.com> | 2021-08-31 11:40:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-18 14:42:20 +0300 |
| commit | 435f0ab4790b7402cb71f6512fc390e641c2326c (patch) | |
| tree | 83ad80376baf521e2f58172993cc53b11a9e2903 | |
| parent | 56f3e27ffdb7b08371b3a57f1f652d4ca194d7f3 (diff) | |
| download | linux-435f0ab4790b7402cb71f6512fc390e641c2326c.tar.xz | |
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: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/wiznet/w5100.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c index ec5db481c9cd..15e13d6dc5db 100644 --- a/drivers/net/ethernet/wiznet/w5100.c +++ b/drivers/net/ethernet/wiznet/w5100.c @@ -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 |