linux-kernel - [PATCH 4.19 084/148] media: dvbdev: Fix memleak in dvb_register

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Message-ID: <20240324235012.1356413-85-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:49:08 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Dinghao Liu <dinghao.liu@....edu.cn>,
	Sean Young <sean@...s.org>,
	Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 084/148] media: dvbdev: Fix memleak in dvb_register_device

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit 167faadfcf9339088910e9e85a1b711fcbbef8e9 ]

When device_create() fails, dvbdev and dvbdevfops should
be freed just like when dvb_register_media_device() fails.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Signed-off-by: Sean Young <sean@...s.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Stable-dep-of: 8c64f4cdf4e6 ("media: edia: dvbdev: fix a use-after-free")
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/dvb-core/dvbdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index 5d68ad0ac5d26..8273c969358e6 100644
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -547,6 +547,9 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
 	if (IS_ERR(clsdev)) {
 		pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
 		       __func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
+		dvb_media_device_free(dvbdev);
+		kfree(dvbdevfops);
+		kfree(dvbdev);
 		return PTR_ERR(clsdev);
 	}
 	dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n",
-- 
2.43.0