linux-kernel - Re: [PATCH] fs/splice: Pull buf->ops->confirm() from splice_from

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, 13 Dec 2010 14:38:19 +0100
From:	Jens Axboe <jaxboe@...ionio.com>
To:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
CC:	Alexander Viro <viro@...iv.linux.org.uk>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Neil Brown <neilb@...e.de>
Subject: Re: [PATCH] fs/splice: Pull buf->ops->confirm() from splice_from_pipe
  actors

On 2010-12-12 22:23, Michał Mirosław wrote:
> This patch pulls calls to buf->ops->confirm() from all actors passed
> (also indirectly) to splice_from_pipe_feed().

Why? The point of ->confirm() is to ensure that the contents are
stable, otherwise the pages in the pipe could merely be in flight.
It's needed if you need to actually look at the data, rather than just
reference it.

-- 
Jens Axboe

--
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/