linux-kernel - Is read barrier missed in kfifo?

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

Message-ID: <5382d3a8-08e0-5429-0cd3-36f9c69197e1@gmail.com>
Date:   Fri, 11 May 2018 15:25:18 +0800
From:   Xiao Guangrong <guangrong.xiao@...il.com>
To:     paulmck@...ux.vnet.ibm.com
Cc:     peterz@...radead.org, rostedt@...dmis.org,
        Lai Jiangshan <jiangshanlai@...il.com>, stefani@...bold.net,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Is read barrier missed in kfifo?

Hi,

Currently, there is no read barrier between reading the index
(kfifo.in) and fetching the real data from the fifo.

I am afraid that will cause the vfifo is observed as not empty
however the data is not actually ready for read. Right?

Thanks!