staging: comedi: check return code of put_user

Function put_user may fail. Check for it. Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
git-mirror · Sep 5, 2010 · 81604d4 · 81604d4
1 parent b04462a
commit 81604d4
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
@@ -537,7 +537,8 @@ static int do_chaninfo_ioctl(struct comedi_device *dev,
 
 			x = (dev->minor << 28) | (it.subdev << 24) | (i << 16) |
 			    (s->range_table_list[i]->length);
-			put_user(x, it.rangelist + i);
+			if (put_user(x, it.rangelist + i))
+				return -EFAULT;
 		}
 #if 0
 		if (copy_to_user(it.rangelist, s->range_type_list,