Commit a05a9bb1 authored by Li Zefan's avatar Li Zefan Committed by David Sterba
Browse files

Btrfs: fix array bound checking 



Otherwise we can execced the array bound of path->slots[].

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
parent f4c697e6

fs/btrfs/ctree.c

+6 −4
Original line number Diff line number Diff line
@@ -902,9 +902,10 @@ static noinline int balance_level(struct btrfs_trans_handle *trans, 


	orig_ptr = btrfs_node_blockptr(mid, orig_slot);



	if (level < BTRFS_MAX_LEVEL - 1)

	if (level < BTRFS_MAX_LEVEL - 1) {

		parent = path->nodes[level + 1];

		pslot = path->slots[level + 1];

	}



	/*

	 * deal with the case where there is only one pointer in the root
@@ -1107,9 +1108,10 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans, 
	mid = path->nodes[level];

	WARN_ON(btrfs_header_generation(mid) != trans->transid);



	if (level < BTRFS_MAX_LEVEL - 1)

	if (level < BTRFS_MAX_LEVEL - 1) {

		parent = path->nodes[level + 1];

		pslot = path->slots[level + 1];

	}



	if (!parent)

		return 1;