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net: sgi: ioc3-eth: check return value after calling platform_get_resource()

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[ Upstream commit db8f7be1e1 ]

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
2021-06-09 21:25:15 +08:00
committed by Greg Kroah-Hartman
parent e613f67f1b
commit fb3b4bcdd3
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/sgi/ioc3-eth.c
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@@ -835,6 +835,10 @@ static int ioc3eth_probe(struct platform_device *pdev)
int err; int err;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_err(&pdev->dev, "Invalid resource\n");
return -EINVAL;
}
/* get mac addr from one wire prom */ /* get mac addr from one wire prom */
if (ioc3eth_get_mac_addr(regs, mac_addr)) if (ioc3eth_get_mac_addr(regs, mac_addr))
return -EPROBE_DEFER; /* not available yet */ return -EPROBE_DEFER; /* not available yet */