Merge branch 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Pull btrfs fixes from Chris Mason:
 "I have two more small fixes this week:

  Qu's fix avoids unneeded COW during fallocate, and Christian found a
  memory leak in the error handling of an earlier fix"

* 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: fix possible leak in btrfs_ioctl_balance()
  btrfs: Avoid truncate tailing page if fallocate range doesn't exceed inode size

fs/btrfs/file.c

@@ -2584,7 +2584,7 @@ static long btrfs_fallocate(struct file *file, int mode,
 					alloc_start);
 		if (ret)
 			goto out;
-	} else {
+	} else if (offset + len > inode->i_size) {
 		/*
 		 * If we are fallocating from the end of the file onward we
 		 * need to zero out the end of the page if i_size lands in the

fs/btrfs/ioctl.c

@@ -4641,7 +4641,7 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
 
 	if (bctl->flags & ~(BTRFS_BALANCE_ARGS_MASK | BTRFS_BALANCE_TYPE_MASK)) {
 		ret = -EINVAL;
-		goto out_bargs;
+		goto out_bctl;
 	}
 
 do_balance:
@@ -4655,12 +4655,15 @@ static long btrfs_ioctl_balance(struct file *file, void __user *arg)
 	need_unlock = false;
 
 	ret = btrfs_balance(bctl, bargs);
+	bctl = NULL;
 
 	if (arg) {
 		if (copy_to_user(arg, bargs, sizeof(*bargs)))
 			ret = -EFAULT;
 	}
 
+out_bctl:
+	kfree(bctl);
 out_bargs:
 	kfree(bargs);
 out_unlock: