[PATCH net-next] net: sgi: ioc3-eth: check return value after calling platform_get_resource()

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <redacted>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 6eef0f45b133..2b29fd4cbdf4 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c

@@ -835,6 +835,10 @@ static int ioc3eth_probe(struct platform_device *pdev)
 	int err;
 
 	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 */
 	if (ioc3eth_get_mac_addr(regs, mac_addr))
 		return -EPROBE_DEFER; /* not available yet */

-- 
2.25.1

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Wed, 9 Jun 2021 21:25:15 +0800 you wrote:

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <redacted>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 4 ++++
 1 file changed, 4 insertions(+)

Here is the summary with links:
  - [net-next] net: sgi: ioc3-eth: check return value after calling platform_get_resource()
    https://git.kernel.org/netdev/net-next/c/db8f7be1e1d6

You are awesome, thank you!
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