linux-kernel - Re: [PATCH] amd-xgbe: fix potential memory leak in xgbe-debugfs

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Date:	Wed, 30 Sep 2015 09:06:47 -0500
From:	Tom Lendacky <thomas.lendacky@....com>
To:	Geliang Tang <geliangtang@....com>
CC:	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] amd-xgbe: fix potential memory leak in xgbe-debugfs

On 09/30/2015 05:48 AM, Geliang Tang wrote:
> Added kfree() to avoid the memory leak when debugfs_create_dir() fails.
>
> Signed-off-by: Geliang Tang <geliangtang@....com>

Acked-by: Tom Lendacky <thomas.lendacky@....com>

> ---
>   drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
> index 2c063b6..66137ff 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
> @@ -330,6 +330,7 @@ void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
>   	pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
>   	if (!pdata->xgbe_debugfs) {
>   		netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
> +		kfree(buf);
>   		return;
>   	}
>
>

Looking at the code, I should also check for buf being NULL before
calling debugfs_create_dir. I'll work up a patch for that and send
it in.

Thanks,
Tom
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