From: Alex Williamson <alex.williamson@redhat.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Sean O. Stalley" <sean.stalley@intel.com>,
Mark Rustad <mark.d.rustad@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [patch v2] vfio/pci: make an array larger
Date: Tue, 10 Nov 2015 19:03:52 +0000 [thread overview]
Message-ID: <1447182232.4925.116.camel@redhat.com> (raw)
In-Reply-To: <20151109122455.GA28870@mwanda>
On Mon, 2015-11-09 at 15:24 +0300, Dan Carpenter wrote:
> Smatch complains about a possible out of bounds error:
>
> drivers/vfio/pci/vfio_pci_config.c:1241 vfio_cap_init()
> error: buffer overflow 'pci_cap_length' 20 <= 20
>
> The problem is that pci_cap_length[] was defined as large enough to
> hold "PCI_CAP_ID_AF + 1" elements. The code in vfio_cap_init() assumes
> it has PCI_CAP_ID_MAX + 1 elements. Originally, PCI_CAP_ID_AF and
> PCI_CAP_ID_MAX were the same but then we introduced PCI_CAP_ID_EA in
> f80b0ba95964 ('PCI: Add Enhanced Allocation register entries') so now
> the array is too small.
>
> Let's fix this by making the array size PCI_CAP_ID_MAX + 1. And let's
> make a similar change to pci_ext_cap_length[] for consistency. Also
> both these arrays can be made const.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
Applied to next for v4.4. Thanks!
Alex
next prev parent reply other threads:[~2015-11-10 19:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 13:26 [patch] vfio: make an array larger Dan Carpenter
2015-11-04 16:40 ` Joe Perches
2015-11-04 18:23 ` Dan Carpenter
2015-11-04 16:54 ` Alex Williamson
2015-11-04 18:20 ` Dan Carpenter
2015-11-04 18:28 ` Alex Williamson
2015-11-09 12:24 ` [patch v2] vfio/pci: " Dan Carpenter
2015-11-10 19:03 ` Alex Williamson [this message]
2015-11-04 21:39 ` [patch] vfio: " walter harms
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