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net: micrel: check return value after calling platform_get_resource()

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[ Upstream commit 20f1932e2282c58cb5ac59517585206cf5b385ae ]

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>
This commit is contained in:
Yang Yingliang
2021-06-07 22:55:21 +08:00
committed by Greg Kroah-Hartman
parent ce1307ec62
commit 278dc34b71
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/micrel/ks8842.c
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@@ -1135,6 +1135,10 @@ static int ks8842_probe(struct platform_device *pdev)
unsigned i; unsigned i;
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem) {
dev_err(&pdev->dev, "Invalid resource\n");
return -EINVAL;
}
if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME))
goto err_mem_region; goto err_mem_region;