linux-kernel - Re: [PATCH 3.16 58/87] cifs: add spinlock for the openFileList to cifsInodeInfo

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Message-ID: <8301f887ce091340b6662371ab2bd1628a06118e.camel@decadent.org.uk>
Date:   Tue, 29 Oct 2019 14:15:45 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     Pavel Shilovskiy <pshilov@...rosoft.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        Denis Kirjanov <kda@...ux-powerpc.org>,
        Ronnie Sahlberg <lsahlber@...hat.com>,
        Steven French <Steven.French@...rosoft.com>
Subject: Re: [PATCH 3.16 58/87] cifs: add spinlock for the openFileList to
 cifsInodeInfo

On Mon, 2019-10-28 at 22:19 +0000, Pavel Shilovskiy wrote:
> > -----Original Message-----
> > From: Ben Hutchings <ben@...adent.org.uk>
> > Sent: Wednesday, October 2, 2019 12:07 PM
> > To: linux-kernel@...r.kernel.org; stable@...r.kernel.org
> > Cc: akpm@...ux-foundation.org; Denis Kirjanov <kda@...ux-powerpc.org>; Ronnie Sahlberg <lsahlber@...hat.com>; Steven French <Steven.French@...rosoft.com>; Pavel Shilovskiy <pshilov@...rosoft.com>
> > Subject: [PATCH 3.16 58/87] cifs: add spinlock for the openFileList to cifsInodeInfo
> > 
> > 3.16.75-rc1 review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Ronnie Sahlberg <lsahlber@...hat.com>
> > 
> > commit 487317c99477d00f22370625d53be3239febabbe upstream.
[...]
> We have recently found regressions in this patch that are addressed in the following two patches:
> 
> cb248819d209d ("cifs: use cifsInodeInfo->open_file_lock while iterating to avoid a panic")
> 1a67c41596575 ("CIFS: Fix use after free of file info structures")
> 
> So, I would suggest either to apply those two patches above or to revert this one.

Thanks for pointing thse out.  I will try to include those in a later
update.

Ben.

-- 
Ben Hutchings
Any sufficiently advanced bug is indistinguishable from a feature.



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