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From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>,
	Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>,
	David Airlie <airlied@linux.ie>,
	intel-gfx@lists.freedesktop.org,
	intel-gvt-dev@lists.freedesktop.org,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915/kvmgt: Fix potential Spectre v1
Date: Tue, 7 Aug 2018 11:35:23 -0500	[thread overview]
Message-ID: <3457723b-826e-fbfe-be10-752241bd9224@embeddedor.com> (raw)
In-Reply-To: <20180807022624.GY22630@zhen-hp.sh.intel.com>

Hi Zhenyu,

On 8/6/18 9:26 PM, Zhenyu Wang wrote:
> On 2018.08.02 22:40:19 -0500, Gustavo A. R. Silva wrote:
>> info.index can be indirectly controlled by user-space, hence leading
>> to a potential exploitation of the Spectre variant 1 vulnerability.
>>
>> This issue was detected with the help of Smatch:
>>
>> drivers/gpu/drm/i915/gvt/kvmgt.c:1232 intel_vgpu_ioctl() warn:
>> potential spectre issue 'vgpu->vdev.region' [r]
>>
>> Fix this by sanitizing info.index before indirectly using it to index
>> vgpu->vdev.region
> 
> Thanks for catching this! Applied.
> 

Glad to help. :)

Thanks
--
Gustavo

      reply	other threads:[~2018-08-07 16:58 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-03  3:40 Gustavo A. R. Silva
2018-08-07  2:26 ` Zhenyu Wang
2018-08-07 16:35   ` Gustavo A. R. Silva [this message]

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