Btrfs: dereferencing freed memory

The original code dereferenced range on the next line.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/ioctl.c

@@ -1374,6 +1374,7 @@ static int btrfs_ioctl_defrag(struct file *file, void __user *argp)
 					   sizeof(*range))) {
 				ret = -EFAULT;
 				kfree(range);
+				goto out;
 			}
 			/* compression requires us to start the IO */
 			if ((range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)) {