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net: mscc: ocelot: check return value after calling platform_get_resource()

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[ Upstream commit f1fe19c2cb3fdc92a614cf330ced1613f8f1a681 ]

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>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.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
2021-06-05 10:31:48 +08:00
committed by Greg Kroah-Hartman
parent f3b96f4b6b
commit 92820a1282
1 changed files with 5 additions and 0 deletions
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5
drivers/net/dsa/ocelot/seville_vsc9953.c
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@@ -1214,6 +1214,11 @@ static int seville_probe(struct platform_device *pdev)
felix->info = &seville_info_vsc9953; felix->info = &seville_info_vsc9953;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
err = -EINVAL;
dev_err(&pdev->dev, "Invalid resource\n");
goto err_alloc_felix;
}
felix->switch_base = res->start; felix->switch_base = res->start;
ds = kzalloc(sizeof(struct dsa_switch), GFP_KERNEL); ds = kzalloc(sizeof(struct dsa_switch), GFP_KERNEL);