linux-kernel - [PATCH] most: fix a memleak in audio_probe

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Date: Tue, 23 Jan 2024 01:20:44 +0800
From: Zhipeng Lu <alexious@....edu.cn>
To: alexious@....edu.cn
Cc: Parthiban Veerasooran <parthiban.veerasooran@...rochip.com>,
	Christian Gromm <christian.gromm@...rochip.com>,
	Dan Carpenter <error27@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] most: fix a memleak in audio_probe_channel

When get_channel fails, audio_probe_channel should free adpt like all
its following error-handling paths after get_channel. Otherwise there
could be a memleak.

Fixes: 15600aea2754 ("staging: most: sound: create one sound card w/ multiple PCM devices per MOST device")
Signed-off-by: Zhipeng Lu <alexious@....edu.cn>
---
 drivers/most/most_snd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/most/most_snd.c b/drivers/most/most_snd.c
index 45d762804c5e..6cccc9c26796 100644
--- a/drivers/most/most_snd.c
+++ b/drivers/most/most_snd.c
@@ -564,7 +564,8 @@ static int audio_probe_channel(struct most_interface *iface, int channel_id,
 	if (get_channel(iface, channel_id)) {
 		pr_err("channel (%s:%d) is already linked\n",
 		       iface->description, channel_id);
-		return -EEXIST;
+		ret = -EEXIST;
+		goto err_free_adpt;
 	}
 
 	if (cfg->direction == MOST_CH_TX) {
-- 
2.34.1