linux-kernel - Re: [PATCH] NVMe: init nvme queue before enabling irq

Open Source and information security mailing list archives

Message-ID: <20160120102228.GP2742@c203.arch.suse.de>
Date:	Wed, 20 Jan 2016 11:22:28 +0100
From:	Johannes Thumshirn <jthumshirn@...e.de>
To:	Sagi Grimberg <sagig@....mellanox.co.il>
Cc:	Wenbo Wang <wenbo.wang@...blaze.com>,
	Wenbo Wang <mail_weber_wang@....com>,
	"keith.busch@...el.com" <keith.busch@...el.com>,
	"axboe@...com" <axboe@...com>,
	"Wenwei.Tao" <wenwei.tao@...blaze.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>
Subject: Re: [PATCH] NVMe: init nvme queue before enabling irq

On Wed, Jan 20, 2016 at 11:56:01AM +0200, Sagi Grimberg wrote:
> 
> >>If it can cause a kernel panic shouldn't it go through stable then as well?
> >
> >Sorry, not quite understand this comment.
> >The "reset process" is the nvme device reset process (performed by nvme_reset_work()) triggered by device fail condition.
> >During normal boot up, nvmeq door bell is initialized in nvme_alloc_queue() which happens before enabling irq, so there is no error.
> >During nvme device reset process, nvme_alloc_queue() is skipped and the race condition exists.
> 
> I think what Johannes meant was that this patch should include a
> "CC: stable@...r.kernel.org" tag.
> 

Exactly. This makes work for us distribution people a lot easier (i.e. we do
not have to manually scan all commits and decide if we need to backport a
patch or not)

Thanks

> _______________________________________________
> Linux-nvme mailing list
> Linux-nvme@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-nvme

-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850

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