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From:   Dinghao Liu <dinghao.liu@zju.edu.cn>
To:     dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc:     Cezary Rojewski <cezary.rojewski@intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Liam Girdwood <liam.r.girdwood@linux.intel.com>,
        Jie Yang <yang.jie@linux.intel.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
        Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
        "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>,
        Vinod Koul <vkoul@kernel.org>, alsa-devel@alsa-project.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: intel: Fix memleak in sst_media_open
Date:   Sun,  9 Aug 2020 16:56:52 +0800
Message-Id: <20200809085654.16483-1-dinghao.liu@zju.edu.cn>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

When power_up_sst() fails, stream needs to be freed
just like when try_module_get() fails. However, current
code is returning directly and ends up leaking memory.

Fixes: 0121327c1a68b ("ASoC: Intel: mfld-pcm: add control for powering up/down dsp")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 sound/soc/intel/atom/sst-mfld-platform-pcm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
index 49b9f18472bc..79fedf9e3da1 100644
--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -330,8 +330,10 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 	runtime->private_data = stream;
 
 	ret_val = power_up_sst(stream);
-	if (ret_val < 0)
+	if (ret_val < 0) {
+		kfree(stream);
 		return ret_val;
+	}
 
 	/* Make sure, that the period size is always even */
 	snd_pcm_hw_constraint_step(substream->runtime, 0,
-- 
2.17.1