linux-kernel - [PATCH] Misc: eeprom - Fix possible NULL derefrence.

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Message-id: <1485515551-3191-1-git-send-email-shailendra.v@samsung.com>
Date:   Fri, 27 Jan 2017 16:42:31 +0530
From:   Shailendra Verma <shailendra.v@...sung.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Cory Tusar <cory.tusar@...1solutions.com>,
        Vladimir Zapolskiy <vz@...ia.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Andrew Lunn <andrew@...n.ch>, linux-kernel@...r.kernel.org,
        p.shailesh@...sung.com, ashish.kalra@...sung.com,
        Shailendra Verma <shailendra.v@...sung.com>,
        Shailendra Verma <shailendra.capricorn@...il.com>
Subject: [PATCH] Misc: eeprom - Fix possible NULL derefrence.

of_match_device could return NULL, and so can cause a NULL
pointer dereference later.

Signed-off-by: Shailendra Verma <shailendra.v@...sung.com>
---
 drivers/misc/eeprom/eeprom_93xx46.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c
index 94cc035..6555975 100644
--- a/drivers/misc/eeprom/eeprom_93xx46.c
+++ b/drivers/misc/eeprom/eeprom_93xx46.c
@@ -381,6 +381,11 @@ static int eeprom_93xx46_probe_dt(struct spi_device *spi)
 	enum of_gpio_flags of_flags;
 	int ret;
 
+	if (!of_id) {
+		dev_err(&spi->dev, "Error: No device match found\n");
+		return -ENODEV;
+	}
+
 	pd = devm_kzalloc(&spi->dev, sizeof(*pd), GFP_KERNEL);
 	if (!pd)
 		return -ENOMEM;
-- 
1.7.9.5