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:	Thu, 13 Sep 2012 18:46:21 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org, tytso@....edu, jack@...e.cz,
	wenqing.lz@...bao.com
Subject: Re: [PATCH 4/7] ext4: fsync should wait for DIO writers

On Sun, Sep 09, 2012 at 09:27:11PM +0400, Dmitry Monakhov wrote:
> fsync and punch_hole are the places where we have to wait for all
> existing writers (writeback, aio, dio), but currently we simply
> flush pended end_io request which is not sufficient.
> Even more i_mutex is not holded while punch_hole which obviously
> result in dangerous data corruption due to write-after-free.

Hi Dmitry,

Lukas already has a patch to take i_mutex locking before punching a
hole.  Just a reminding. :-)

https://patchwork.kernel.org/patch/1247271/

Regards,
Zheng
--
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

Powered by blists - more mailing lists