linux-kernel - RE: [PATCH 06/15] hv: acquire vmbus_connection.channel_mutex in vmbus_free

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Message-ID: <DM5PR03MB24907786E04A57B4886A3E2FA08E0@DM5PR03MB2490.namprd03.prod.outlook.com>
Date:   Fri, 2 Dec 2016 06:11:42 +0000
From:   KY Srinivasan <kys@...rosoft.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "leann.ogasawara@...onical.com" <leann.ogasawara@...onical.com>
Subject: RE: [PATCH 06/15] hv: acquire vmbus_connection.channel_mutex in
 vmbus_free_channels()



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Thursday, December 1, 2016 12:37 PM
> To: KY Srinivasan <kys@...rosoft.com>
> Cc: linux-kernel@...r.kernel.org; devel@...uxdriverproject.org;
> olaf@...fle.de; apw@...onical.com; vkuznets@...hat.com;
> jasowang@...hat.com; leann.ogasawara@...onical.com
> Subject: Re: [PATCH 06/15] hv: acquire vmbus_connection.channel_mutex in
> vmbus_free_channels()
> 
> On Thu, Dec 01, 2016 at 09:28:43AM -0800, kys@...hange.microsoft.com
> wrote:
> > From: Vitaly Kuznetsov <vkuznets@...hat.com>
> >
> > "kernel BUG at drivers/hv/channel_mgmt.c:350!" is observed when
> hv_vmbus
> > module is unloaded. BUG_ON() was introduced in commit 85d9aa705184
> > ("Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister()") as
> > vmbus_free_channels() codepath was apparently forgotten.
> >
> > Fixes: 85d9aa705184 ("Drivers: hv: vmbus: add an API
> vmbus_hvsock_device_unregister()")
> > Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> > ---
> >  drivers/hv/channel_mgmt.c |    2 ++
> >  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> Shouldn't this go to stable kernels?

Yes; I will resubmit.

Regards,

K. Y