linux-kernel - [PATCH v3] media: davinci: vpif: Fix memory leak in probe error path

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Message-ID: <20250416205121.2348-1-Dm1tryNk@yandex.ru>
Date: Wed, 16 Apr 2025 23:51:19 +0300
From: Dmitry Nikiforov <Dm1tryNk@...dex.ru>
To: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc: Dmitry Nikiforov <Dm1tryNk@...dex.ru>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil@...all.nl>,
	Johan Hovold <johan@...nel.org>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	lvc-project@...uxtesting.org
Subject: [PATCH v3] media: davinci: vpif: Fix memory leak in probe error path

If an error occurs during the initialization of `pdev_display`,
the allocated platform device `pdev_capture` is not released properly,
leading to a memory leak.

Adjust error path handling to fix the leak.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 43acb728bbc4 ("media: davinci: vpif: fix use-after-free on driver unbind")
Signed-off-by: Dmitry Nikiforov <Dm1tryNk@...dex.ru>
---
v2: also fix of_graph_get_endpoint_by_regs() error path.
v3: Rework incorrect error handling added in v2.
Also fix missing platform_device_del() in another error path (Johan Hovold).
 drivers/media/platform/ti/davinci/vpif.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/ti/davinci/vpif.c b/drivers/media/platform/ti/davinci/vpif.c
index a81719702a22..969d623fc842 100644
--- a/drivers/media/platform/ti/davinci/vpif.c
+++ b/drivers/media/platform/ti/davinci/vpif.c
@@ -504,7 +504,7 @@ static int vpif_probe(struct platform_device *pdev)
 	pdev_display = kzalloc(sizeof(*pdev_display), GFP_KERNEL);
 	if (!pdev_display) {
 		ret = -ENOMEM;
-		goto err_put_pdev_capture;
+		goto err_del_pdev_capture;
 	}
 
 	pdev_display->name = "vpif_display";
@@ -527,6 +527,8 @@ static int vpif_probe(struct platform_device *pdev)
 
 err_put_pdev_display:
 	platform_device_put(pdev_display);
+err_del_pdev_capture:
+	platform_device_del(pdev_capture);
 err_put_pdev_capture:
 	platform_device_put(pdev_capture);
 err_put_rpm:
-- 
2.49.0