linux-kernel - Re: [PATCH PREEMPT RT] rt-mutex: fix deadlock in device mapper

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: <1511299251.30074.72.camel@gmx.de>
Date:   Tue, 21 Nov 2017 22:20:51 +0100
From:   Mike Galbraith <efault@....de>
To:     Mikulas Patocka <mpatocka@...hat.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-rt-users@...r.kernel.org
Subject: Re: [PATCH PREEMPT RT] rt-mutex: fix deadlock in device mapper

On Tue, 2017-11-21 at 14:56 -0500, Mikulas Patocka wrote:
> 
> If we don't have any reason why it is needed to unplug block requests when 
> a spinlock is taken - so let's not do this.

That's perfectly fine.  I guess I shouldn't have even mentioned having
encountered unplug at mutex being insufficient.

	-Mike