linux-kernel - [PATCH] staging: vme: fix for a potential NULL pointer dereference

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Message-Id: <1364189869-9275-1-git-send-email-gmate.amit@gmail.com>
Date:	Sun, 24 Mar 2013 22:37:48 -0700
From:	Kumar Amit Mehta <gmate.amit@...il.com>
To:	martyn.welch@...com
Cc:	manohar.vanga@...il.com, gregkh@...uxfoundation.org,
	yamanetoshi@...il.com, joe@...ches.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] staging: vme: fix for a potential NULL pointer dereference

Audit the return value of cdev_alloc and hence fixes a potential NULL pointer
dereferencing.

Signed-off-by: Kumar Amit Mehta <gmate.amit@...il.com>
---
 drivers/staging/vme/devices/vme_user.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index d074b1e..da7f759 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -710,6 +710,10 @@ static int vme_user_probe(struct vme_dev *vdev)
 
 	/* Register the driver as a char device */
 	vme_user_cdev = cdev_alloc();
+	if (!vme_user_cdev) {
+		err = -ENOMEM;
+		goto err_char;
+	}
 	vme_user_cdev->ops = &vme_user_fops;
 	vme_user_cdev->owner = THIS_MODULE;
 	err = cdev_add(vme_user_cdev, MKDEV(VME_MAJOR, 0), VME_DEVS);
-- 
1.7.9.5

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