linux-kernel - [PATCH] ALSA: pci/asihpi: Fix memory leak in snd_card_asihpi_capture

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Message-Id: <20200810063957.13692-1-dinghao.liu@zju.edu.cn>
Date:   Mon, 10 Aug 2020 14:39:55 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Eliot Blennerhassett <eblennerhassett@...ioscience.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: pci/asihpi: Fix memory leak in snd_card_asihpi_capture_open()

When snd_pcm_hw_constraint_pow2() fails, dpcm should be freed
just like when hpi_instream_open()  fails.

Fixes: 719f82d3987aa ("ALSA: Add support of AudioScience ASI boards")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 sound/pci/asihpi/asihpi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 023c35a2a951..736eceacd3d0 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -1244,8 +1244,10 @@ static int snd_card_asihpi_capture_open(struct snd_pcm_substream *substream)
 	if (card->can_dma)
 		err = snd_pcm_hw_constraint_pow2(runtime, 0,
 					SNDRV_PCM_HW_PARAM_BUFFER_BYTES);
-	if (err < 0)
+	if (err < 0) {
+		kfree(dpcm);
 		return err;
+	}
 
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 		card->update_interval_frames);
-- 
2.17.1