linux-ext4 - Re: [PATCH] Add checks to validate extent entries.

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

Date:	Mon, 9 Feb 2009 16:01:58 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Thiemo Nagel <thiemo.nagel@...tum.de>
Cc:	tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] Add checks to validate extent entries.

On Mon, Feb 09, 2009 at 11:26:12AM +0100, Thiemo Nagel wrote:
> Aneesh Kumar K.V wrote:
> > This patch adds check to validate the extent entries along
> > with extent  headers. Should handle crash with corrupt filesystem.
> 
> While your patch probably decreases the average number of checks that
> are done, it makes single random accesses quite expensive since always
> complete extent blocks are checked at once, even if just a single pblock
> is accessed.  No idea whether there are workloads which have that as a
> typical access pattern...

The second patch make sure we do it only when we read the extent
information from the disk.

-aneesh
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html