linux-kernel - Re: [PATCH 4/9] Factor common inode cluster buffer lookup code

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 23 Nov 2007 17:40:13 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	David Chinner <dgc@....com>
Cc:	xfs-oss <xfs@....sgi.com>, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/9] Factor common inode cluster buffer lookup code

On Thu, Nov 22, 2007 at 11:36:42AM +1100, David Chinner wrote:
> +STATIC int
> +xfs_ino_to_imap(
> +	xfs_mount_t	*mp,
> +	xfs_trans_t	*tp,
> +	xfs_ino_t	ino,
> +	xfs_imap_t	*imap,
> +	uint		imap_flags)
> +{
> +	int		error;
> +
> +	error = xfs_imap(mp, tp, ino, imap, imap_flags);
> +	if (error) {
> +		cmn_err(CE_WARN, "xfs_ino_to_imap: xfs_imap()  returned an "
> +				"error %d on %s.  Returning error.",
> +				error, mp->m_fsname);
> +		return error;
> +	}
> +
> +	/*
> +	 * If the inode number maps to a block outside the bounds
> +	 * of the file system then return NULL rather than calling
> +	 * read_buf and panicing when we get an error from the
> +	 * driver.
> +	 */
> +	if ((imap->im_blkno + imap->im_len) >
> +	    XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) {
> +		xfs_fs_cmn_err(CE_ALERT, mp, "xfs_ino_to_imap: "
> +			"(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > "
> +			" XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)",
> +			(unsigned long long) imap->im_blkno,
> +			(unsigned long long) imap->im_len,
> +			XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks));
> +		return XFS_ERROR(EINVAL);
> +	}

What about just adding this verification to xfs_imap instead of creating
this wrapper for two of it's three callers?

Otherwise this patch looks fine to me.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/