linux-kernel - Re: [PATCH] net: fjes: fix potential NULL pointer dereferences

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Message-Id: <3B261BFF-1A3A-4EC1-B1CC-52404F709EC6@umn.edu>
Date:   Mon, 11 Mar 2019 23:56:24 -0500
From:   Kangjie Lu <kjlu@....edu>
To:     David Miller <davem@...emloft.net>
Cc:     pakki001@....edu, colin.king@...onical.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: fjes: fix potential NULL pointer dereferences



> On Mar 11, 2019, at 6:19 PM, David Miller <davem@...emloft.net> wrote:
> 
> From: Kangjie Lu <kjlu@....edu>
> Date: Mon, 11 Mar 2019 02:10:21 -0500
> 
>> 	adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
>> 					      WQ_MEM_RECLAIM, 0);
>> +	if (!adapter->control_wq) {
>> +		err = -ENOMEM;
>> +		goto err_free_netdev;
>> +	}
> 
> This error path leaks adapter->txrx_wq.

The following code also has an error-handling case: goto err_free_netdev.
Shouldn’t the resource release be in err_free_netdev?

>