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From: Vasilis Liaskovitis <vliaskovitis@suse.com>
To: "Roger Pau Monné" <roger.pau@citrix.com>
Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
	linux-block@vger.kernel.org, jgross@suse.com,
	boris.ostrovsky@oracle.com, konrad.wilk@oracle.com,
	axboe@kernel.dk
Subject: Re: [PATCH v2] xen/blkfront: avoid NULL blkfront_info dereference on device removal
Date: Mon, 15 Oct 2018 16:25:56 +0200	[thread overview]
Message-ID: <b0b793a6cdfd634e126fbb00554ca68a780a00bd.camel@suse.com> (raw)
In-Reply-To: <20181015140201.elir7ettk7sz4aix@mac.bytemobile.com>

On Mon, 2018-10-15 at 16:02 +0200, Roger Pau Monné wrote:
> 
> > This results in a NULL pointer BUG when blkfront_remove and
> > blkif_free
> > try to access the failing device's NULL struct blkfront_info.
> > 
> > 
> I guess this is a candidate for backporting?
> 

yes, I think so. At least for kernels >=4.5, which could face this
issue due to commit c31ecf6c12 (this frees the struct blkinfo in the
failing path of talk_to_blkback).

thanks, 

- Vasilis



  reply	other threads:[~2018-10-15 14:26 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-15 13:25 Vasilis Liaskovitis
2018-10-15 14:02 ` Roger Pau Monné
2018-10-15 14:25   ` Vasilis Liaskovitis [this message]
2018-10-18 23:54     ` Konrad Rzeszutek Wilk

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