linux-kernel - [PATCH 4.15 14/72] i2c: i2c-stm32f7: fix no check on returned setup

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Message-Id: <20180406084350.661098580@linuxfoundation.org>
Date:   Fri,  6 Apr 2018 15:23:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Wolfram Sang <wsa@...-dreams.de>, stable@...nel.org
Subject: [PATCH 4.15 14/72] i2c: i2c-stm32f7: fix no check on returned setup

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pierre-Yves MORDRET <pierre-yves.mordret@...com>

commit 771b7bf05339081019d22452ebcab6929372e13e upstream.

Before assigning returned setup structure check if not null

Fixes: 463a9215f3ca7600b5ff ("i2c: stm32f7: fix setup structure")
Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@...com>
Acked-by: Alexandre TORGUE <alexandre.torgue@...com>
Signed-off-by: Wolfram Sang <wsa@...-dreams.de>
Cc: stable@...nel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/i2c/busses/i2c-stm32f7.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -888,6 +888,11 @@ static int stm32f7_i2c_probe(struct plat
 	}
 
 	setup = of_device_get_match_data(&pdev->dev);
+	if (!setup) {
+		dev_err(&pdev->dev, "Can't get device data\n");
+		ret = -ENODEV;
+		goto clk_free;
+	}
 	i2c_dev->setup = *setup;
 
 	ret = device_property_read_u32(i2c_dev->dev, "i2c-scl-rising-time-ns",