On Tue, Jun 10, 2014 at 05:13:21PM -0500, Eric Sandeen wrote:
> In this case, if bp is null, error is set, and we send
> bp to xfs_trans_brelse, which will try to dereference it.
>
> Test whether we actualy have a buffer before we try to
> free it.
>
> Coverity spotted this.
>
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
> ---
Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>
>
> diff --git a/fs/xfs/xfs_da_btree.c b/fs/xfs/xfs_da_btree.c
> index 6cc5f67..41f7a42 100644
> --- a/fs/xfs/xfs_da_btree.c
> +++ b/fs/xfs/xfs_da_btree.c
> @@ -2571,7 +2571,8 @@ xfs_da_get_buf(
> mapp, nmap, 0);
> error = bp ? bp->b_error : XFS_ERROR(EIO);
> if (error) {
> - xfs_trans_brelse(trans, bp);
> + if (bp)
> + xfs_trans_brelse(trans, bp);
> goto out_free;
> }
>
>
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