linux-kernel - Re: [PATCH 1/2] bdi: make sure congestion states are clear on free

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: <20180205230231.GA24824@cmpxchg.org>
Date:   Mon, 5 Feb 2018 18:02:31 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Tejun Heo <tj@...nel.org>
Cc:     Jens Axboe <axboe@...nel.dk>, Miklos Szeredi <miklos@...redi.hu>,
        Joshua Miller <joshmiller@...com>, kernel-team@...com,
        Jan Kara <jack@...e.cz>, stable@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/2] bdi: make sure congestion states are clear on free

On Fri, Feb 02, 2018 at 09:53:28AM -0800, Tejun Heo wrote:
> FUSE has a bug where it fails to clear congestion states if a
> connection gets aborted while congested, which can leave
> nr_wb_congested[] stuck until reboot causing wait_iff_congested() to
> wait spuriously.
> 
> While the bdi owner, FUSE, is primarily responsible for clearing
> congestion states before destroying bdi_writebacks, bdi layer can
> ensure that congestion states are not leaked beyond bdi_writeback
> lifecycle.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reported-by: Joshua Miller <joshmiller@...com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Jan Kara <jack@...e.cz>
> Cc: stable@...r.kernel.org

Acked-by: Johannes Weiner <hannes@...xchg.org>