linux-kernel - Re: [PATCH] net/mlx4_en: do batched put_page using atomic

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] [day] [month] [year] [list]

Message-Id: <20160419.200709.1456260686653504927.davem@davemloft.net>
Date:	Tue, 19 Apr 2016 20:07:09 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	khlebnikov@...dex-team.ru
Cc:	netdev@...r.kernel.org, yishaih@...lanox.com, eugenia@...lanox.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx4_en: do batched put_page using atomic_sub

From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Date: Mon, 18 Apr 2016 14:34:05 +0300

> This patch fixes couple error paths after allocation failures.
> Atomic set of page reference counter is safe only if it is zero,
> otherwise set can race with any speculative get_page_unless_zero.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>

Applied.