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net: w5100: check return value after calling platform_get_resource()
author
Yang Yingliang
<yangyingliang@huawei.com>
Tue, 31 Aug 2021 08:40:18 +0000
(16:40 +0800)
committer
David S. Miller
<davem@davemloft.net>
Tue, 31 Aug 2021 11:08:42 +0000
(12:08 +0100)
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>
drivers/net/ethernet/wiznet/w5100.c
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diff --git
a/drivers/net/ethernet/wiznet/w5100.c
b/drivers/net/ethernet/wiznet/w5100.c
index
811815f
..
f974e70
100644
(file)
--- 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