Re: [PATCH 1/4] xfs: detect self referencing btree sibling pointers

[Christoph Hellwig <hch@infradead.org>]

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>

One nit (with a few instances):

> +	if (level >= 0) {
> +		if (!xfs_btree_check_lptr(cur, sibling, level + 1))
> +			return __this_address;
> +	} else if (!xfs_verify_fsbno(mp, sibling)) {
> +		return __this_address;
> +	}

Maybe it's just me, but I would find the non-condensed version a little
easier to read for these kinds of checks:

	if (level >= 0) {
		if (!xfs_btree_check_lptr(cur, sibling, level + 1))
			return __this_address;
	} else {
		if (!xfs_verify_fsbno(mp, sibling))
			return __this_address;
	}