Re: [PATCH] ethernet: fix potential memory leak in gemini_ethernet_port_probe()

From: Markus Elfring <hidden>
Date: 2020-07-29 08:39:13
Also in: kernel-janitors, lkml

If some processes in gemini_ethernet_port_probe() fail,
free_netdev(dev) needs to be called to avoid a memory leak.
Would you like to use an imperative wording for this change description?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=6ba1b005ffc388c2aeaddae20da29e4810dea298#n151
quoted hunk
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2501,8 +2513,10 @@  static int gemini_ethernet_port_probe(struct platform_device *pdev)
 					IRQF_SHARED,
 					port_names[port->id],
 					port);
-	if (ret)
+	if (ret) {
+		free_netdev(netdev);
 		return ret;
+	}

 	ret = register_netdev(netdev);
…

I suggest to add a jump target for the desired exception handling
in this function implementation.

 	if (ret)
-		return ret;
+		goto free_netdev;

Regards,
Markus
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