linux-kernel - Re: [PATCH 1/2] amdgpu: validate drm_amdgpu_gem

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Date:   Thu, 18 May 2023 16:12:06 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Chia-I Wu <olvaffe@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, Philip Yang <Philip.Yang@....com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        amd-gfx@...ts.freedesktop.org,
        Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@....com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>, linux-kernel@...r.kernel.org,
        Mukul Joshi <mukul.joshi@....com>,
        Marek Olšák <marek.olsak@....com>,
        Luben Tuikov <luben.tuikov@....com>,
        Yang Li <yang.lee@...ux.alibaba.com>,
        Danijel Slivka <danijel.slivka@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH 1/2] amdgpu: validate drm_amdgpu_gem_va addrs for all ops

On Wed, May 17, 2023 at 5:27 PM Chia-I Wu <olvaffe@...il.com> wrote:
>
> On Tue, May 9, 2023 at 11:33 AM Chia-I Wu <olvaffe@...il.com> wrote:
> >
> > Extend the address and size validations to AMDGPU_VA_OP_UNMAP and
> > AMDGPU_VA_OP_CLEAR by moving the validations to amdgpu_gem_va_ioctl.
> >
> > Internal users of amdgpu_vm_bo_map are no longer validated but they
> > should be fine.
> >
> > Userspace (radeonsi and radv) seems fine as well.
> Does this series make sense?

I think so, I haven't had a chance to go through this too closely yet,
but amdgpu_vm_bo_map() is used by ROCm as well so we'd need to make
sure that removing the checks in patch 1 wouldn't affect that path as
well.  The changes in patch 2 look good.  Also, these patches are
missing your SOB.

Thanks,

Alex


Alex