linux-kernel - Re: [PATCH v6 1/2] drm/amd: validate user pitch alignment

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Date:   Tue, 8 Jan 2019 16:25:45 +0100
From:   Michel Dänzer <michel@...nzer.net>
To:     Yu Zhao <yuzhao@...gle.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Christian König <christian.koenig@....com>,
        Alex Deucher <alexander.deucher@....com>
Cc:     David Zhou <David1.Zhou@....com>,
        Daniel Stone <daniels@...labora.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, Samuel Li <Samuel.Li@....com>,
        Junwei Zhang <Jerry.Zhang@....com>, stable@...r.kernel.org,
        Harry Wentland <harry.wentland@....com>
Subject: Re: [PATCH v6 1/2] drm/amd: validate user pitch alignment

On 2019-01-07 11:51 p.m., Yu Zhao wrote:
> Userspace may request pitch alignment that is not supported by GPU.
> Some requests 32, but GPU ignores it and uses default 64 when cpp is
> 4. If GEM object is allocated based on the smaller alignment, GPU
> DMA will go out of bound.
> 
> Cc: stable@...r.kernel.org # v4.2+
> Signed-off-by: Yu Zhao <yuzhao@...gle.com>

Both patches applied to amd-staging-drm-next (should land in 5.0), thanks!


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer