From: Ian Abbott <abbotti@mev.co.uk>
Date: Mon, 9 Feb 2009 16:51:38 +0000 (+0000)
Subject: comedi_open: Fix null pointer dereference.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=9e49d96b10e0580f585a2405aa6cd1e7a17233eb;p=comedi.git

comedi_open: Fix null pointer dereference.
---

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 7fc40ca1..198f4d99 100644
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1756,7 +1756,7 @@ static int comedi_open(struct inode *inode, struct file *file)
 {
 	const unsigned minor = iminor(inode);
 	struct comedi_device_file_info *dev_file_info = comedi_get_device_file_info(minor);
-	comedi_device *dev = dev_file_info->device;
+	comedi_device *dev = dev_file_info ? dev_file_info->device : NULL;
 	if (dev == NULL) {
 		DPRINTK("invalid minor number\n");
 		return -ENODEV;