On Tue, Sep 06, 2011 at 04:55:34PM +0800, Li Zefan wrote:
> Otherwise we can execced the array bound of path->slots[].
>
> Signed-off-by: Li Zefan <[email protected]>
Reviewed-by: David Sterba <[email protected]>
> ---
> fs/btrfs/ctree.c | 10 ++++++----
> 1 files changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
> index 011cab3..0fe615e 100644
> --- a/fs/btrfs/ctree.c
> +++ b/fs/btrfs/ctree.c
> @@ -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];
> + 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];
> + pslot = path->slots[level + 1];
> + }
>
> if (!parent)
> return 1;
> --
> 1.7.3.1
> --
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