linux-kernel - [PATCH 4.18 112/158] regulator: tps65217: Fix NULL pointer dereference on probe

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Message-Id: <20180917211716.433122849@linuxfoundation.org>
Date:   Tue, 18 Sep 2018 00:42:22 +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, Anton Vasilyev <vasilyev@...ras.ru>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 112/158] regulator: tps65217: Fix NULL pointer dereference on probe

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

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

From: Anton Vasilyev <vasilyev@...ras.ru>

[ Upstream commit 4f919ca2bf6da826ba1a4316e1b8e9c94e5dbeb2 ]

There is no check that tps->strobes is allocated successfully in
tps65217_regulator_probe().
The patch adds corresponding check.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@...ras.ru>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/regulator/tps65217-regulator.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/regulator/tps65217-regulator.c
+++ b/drivers/regulator/tps65217-regulator.c
@@ -232,6 +232,8 @@ static int tps65217_regulator_probe(stru
 	tps->strobes = devm_kcalloc(&pdev->dev,
 				    TPS65217_NUM_REGULATOR, sizeof(u8),
 				    GFP_KERNEL);
+	if (!tps->strobes)
+		return -ENOMEM;
 
 	platform_set_drvdata(pdev, tps);