linux-kernel - [PATCH 4.19 167/346] media: siano: fix memory leak of debugfs members in smsdvb

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Date:   Mon, 28 Dec 2020 13:48:06 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Keita Suzuki <keitasuzuki.park@...ab.ics.keio.ac.jp>,
        Sean Young <sean@...s.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 167/346] media: siano: fix memory leak of debugfs members in smsdvb_hotplug

From: Keita Suzuki <keitasuzuki.park@...ab.ics.keio.ac.jp>

[ Upstream commit abf287eeff4c6da6aa804bbd429dfd9d0dfb6ea7 ]

When dvb_create_media_graph fails, the debugfs kept inside client should
be released. However, the current implementation does not release them.

Fix this by adding a new goto label to call smsdvb_debugfs_release.

Fixes: 0d3ab8410dcb ("[media] dvb core: must check dvb_create_media_graph()")
Signed-off-by: Keita Suzuki <keitasuzuki.park@...ab.ics.keio.ac.jp>
Signed-off-by: Sean Young <sean@...s.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/common/siano/smsdvb-main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/common/siano/smsdvb-main.c b/drivers/media/common/siano/smsdvb-main.c
index 43cfd1dbda014..afca47b97c2a2 100644
--- a/drivers/media/common/siano/smsdvb-main.c
+++ b/drivers/media/common/siano/smsdvb-main.c
@@ -1180,12 +1180,15 @@ static int smsdvb_hotplug(struct smscore_device_t *coredev,
 	rc = dvb_create_media_graph(&client->adapter, true);
 	if (rc < 0) {
 		pr_err("dvb_create_media_graph failed %d\n", rc);
-		goto client_error;
+		goto media_graph_error;
 	}
 
 	pr_info("DVB interface registered.\n");
 	return 0;
 
+media_graph_error:
+	smsdvb_debugfs_release(client);
+
 client_error:
 	dvb_unregister_frontend(&client->frontend);
 
-- 
2.27.0