linux-kernel - Re: [PATCH] aio: propogate post-EIOCBQUEUED errors to completion event

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]

Message-ID: <20070220002853.GL6133@think.oraclecorp.com>
Date:	Mon, 19 Feb 2007 19:28:53 -0500
From:	Chris Mason <chris.mason@...cle.com>
To:	Benjamin LaHaise <bcrl@...ck.org>
Cc:	"Ananiev, Leonid I" <leonid.i.ananiev@...el.com>,
	Zach Brown <zach.brown@...cle.com>, linux-aio@...ck.org,
	linux-kernel@...r.kernel.org,
	Suparna bhattacharya <suparna@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] aio: propogate post-EIOCBQUEUED errors to completion event

On Mon, Feb 19, 2007 at 07:21:09PM -0500, Benjamin LaHaise wrote:
> On Mon, Feb 19, 2007 at 04:50:48PM -0500, Chris Mason wrote:
> > aio is not responsible for this particular synchronization.  Those fixes
> > (if we make them) should come from other places.  The patch is important
> > to get aio error handling right.
> > 
> > I would argue that one common cause of the EIO is userland
> > error (mmap concurrent with O_DIRECT), and EIO is the correct answer.
> 
> I disagree.  That means that using the pagecache to synchronize things like 
> the proposed online defragmentation will occasionally make O_DIRECT users 
> fail.  O_DIRECT doesn't prevent the sysadmin from copying files or other 
> page cache uses, which implies that generating an error in these cases is 
> horrifically broken.  If only root could do it, I wouldn't complain, but 
> this would seem to imply that user vs root holes still exist.

I'm working on this part in the placeholder patches.  It's just a separate
problem from the aio code.

-chris

-
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/