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From: Nadezda Lutovinova <>
To: Andrzej Hajda <>
Cc: Nadezda Lutovinova <>,
	Mauro Carvalho Chehab <>,,,,
Subject: [PATCH] media: s5p-mfc: Add checking to s5p_mfc_probe().
Date: Wed, 11 Aug 2021 16:32:28 +0300	[thread overview]
Message-ID: <> (raw)

If of_device_get_match_data() return NULL,
then null pointer dereference occurs in  s5p_mfc_init_pm().
The patch adds checking if dev->variant is NULL.

Found by Linux Driver Verification project (

Signed-off-by: Nadezda Lutovinova <>
 drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index eba2b9f040df..b56ff75cb9cc 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1288,6 +1288,10 @@ static int s5p_mfc_probe(struct platform_device *pdev)
 	dev->variant = of_device_get_match_data(&pdev->dev);
+	if (!dev->variant) {
+		dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n");
+		return -ENOENT;
+	}
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	dev->regs_base = devm_ioremap_resource(&pdev->dev, res);

                 reply	other threads:[~2021-08-11 13:32 UTC|newest]

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