V4L/DVB (4176): Bug-fix: Fix memory overflow

Do not overflow kernel memory when more than BT878_MAX devices are 
present.

Signed-off-by: Sigmund Augdal Helberg <sigmund@snap.tv>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/media/dvb/bt8xx/bt878.c b/drivers/media/dvb/bt8xx/bt878.c
index 5500f8a0ffe2..47281c905149 100644
--- a/drivers/media/dvb/bt8xx/bt878.c
+++ b/drivers/media/dvb/bt8xx/bt878.c
@@ -417,6 +417,11 @@ static int __devinit bt878_probe(struct pci_dev *dev,
 
         printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
                bt878_num);
+        if (bt878_num >= BT878_MAX) {
+                printk(KERN_ERR "bt878: Too many devices inserted\n");
+                result = -ENOMEM;
+                goto fail0;
+        }
         if (pci_enable_device(dev))
                 return -EIO;