linux-kernel - [PATCH v2 1/2] platform/x86: dell-wmi-descriptor: check if memory was allocated

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Message-Id: <f881e6211efa9cec49c29d324cb1c8e54f184bb4.1510246939.git.mario.limonciello@dell.com>
Date:   Thu,  9 Nov 2017 11:49:09 -0600
From:   Mario Limonciello <mario.limonciello@...l.com>
To:     dvhart@...radead.org, Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        platform-driver-x86@...r.kernel.org, pali.rohar@...il.com,
        Mario Limonciello <mario.limonciello@...l.com>
Subject: [PATCH v2 1/2] platform/x86: dell-wmi-descriptor: check if memory was allocated

devm_kzalloc will return NULL pointer if no memory was allocated.
This should be checked.  This problem also existed when the driver
was dell-wmi.c.

Signed-off-by: Mario Limonciello <mario.limonciello@...l.com>
Reviewed-by: Pali Rohár <pali.rohar@...il.com>
---
 drivers/platform/x86/dell-wmi-descriptor.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/platform/x86/dell-wmi-descriptor.c b/drivers/platform/x86/dell-wmi-descriptor.c
index 3204c408e261..28ef5f37cfbf 100644
--- a/drivers/platform/x86/dell-wmi-descriptor.c
+++ b/drivers/platform/x86/dell-wmi-descriptor.c
@@ -121,6 +121,11 @@ static int dell_wmi_descriptor_probe(struct wmi_device *wdev)
 	priv = devm_kzalloc(&wdev->dev, sizeof(struct descriptor_priv),
 	GFP_KERNEL);
 
+	if (!priv) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
 	priv->interface_version = buffer[2];
 	priv->size = buffer[3];
 	ret = 0;
-- 
2.14.1