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Subject: Re: [PATCH] ASoC: SOF: Fix memory leak in sof_dfsentry_write
To:     Navid Emamdoost <navid.emamdoost@gmail.com>
Cc:     emamd001@umn.edu, kjlu@umn.edu, smccaman@umn.edu,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Wei Yongjun <weiyongjun1@huawei.com>,
        alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
References: <20191027194856.4056-1-navid.emamdoost@gmail.com>
From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Message-ID: <4d08ed12-48fa-ed7f-3988-8d040c64acb1@linux.intel.com>
Date:   Sun, 27 Oct 2019 20:47:42 -0500
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On 10/27/19 2:48 PM, Navid Emamdoost wrote:
> In the implementation of sof_dfsentry_write() memory allocated for
> string is leaked in case of an error. Go to error handling path if the
> d_name.name is not valid.
> 
> Fixes: 091c12e1f50c ("ASoC: SOF: debug: add new debugfs entries for IPC flood test")
> Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

> ---
>   sound/soc/sof/debug.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c
> index 54cd431faab7..5529e8eeca46 100644
> --- a/sound/soc/sof/debug.c
> +++ b/sound/soc/sof/debug.c
> @@ -152,8 +152,10 @@ static ssize_t sof_dfsentry_write(struct file *file, const char __user *buffer,
>   	 */
>   	dentry = file->f_path.dentry;
>   	if (strcmp(dentry->d_name.name, "ipc_flood_count") &&
> -	    strcmp(dentry->d_name.name, "ipc_flood_duration_ms"))
> -		return -EINVAL;
> +	    strcmp(dentry->d_name.name, "ipc_flood_duration_ms")) {
> +		ret = -EINVAL;
> +		goto out;
> +	}
>   
>   	if (!strcmp(dentry->d_name.name, "ipc_flood_duration_ms"))
>   		flood_duration_test = true;
>