linux-kernel - Re: 6.7/regression/KASAN: null-ptr-deref in amdgpu_ras_reset_error

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Date:   Thu, 16 Nov 2023 13:56:16 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
Cc:     "Deucher, Alexander" <alexander.deucher@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Christian König <christian.koenig@....com>
Subject: Re: 6.7/regression/KASAN: null-ptr-deref in amdgpu_ras_reset_error_count+0x2d6

On Wed, Nov 15, 2023 at 1:14 PM Mikhail Gavrilov
<mikhail.v.gavrilov@...il.com> wrote:
>
> On Wed, Nov 8, 2023 at 4:24 AM Mikhail Gavrilov
> <mikhail.v.gavrilov@...il.com> wrote:
> >
> > Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@...il.com>
> > Thanks, after applying the patch GPU loading meets expectations.
> > Games are working so overall all looking good for now.
> >
>
> Unfortunately I didn't check this patch on 7900XTX.
> And now I see that this patch leads the systems with 7900XTX GPU to a
> lot of protection fault messages in the kernel log.
>
> [   75.211702] gmc_v11_0_process_interrupt: 164 callbacks suppressed
> [   75.211706] amdgpu 0000:03:00.0: amdgpu: [gfxhub] page fault
> (src_id:0 ring:169 vmid:0 pasid:0, for process  pid 0 thread  pid 0)
> [   75.211715] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x00008087fe5fd000 from client 10
> [   75.211718] amdgpu 0000:03:00.0: amdgpu:
> GCVM_L2_PROTECTION_FAULT_STATUS:0x00041D53
> [   75.211720] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID: SDMA1 (0xe)
> [   75.211723] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x1
> [   75.211725] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x1
> [   75.211727] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x5
> [   75.211729] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x1
> [   75.211732] amdgpu 0000:03:00.0: amdgpu: RW: 0x1
> [   75.211740] amdgpu 0000:03:00.0: amdgpu: [gfxhub] page fault
> (src_id:0 ring:169 vmid:0 pasid:0, for process  pid 0 thread  pid 0)
> [   75.211743] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x00008087bffff000 from client 10
> [   75.211746] amdgpu 0000:03:00.0: amdgpu:
> GCVM_L2_PROTECTION_FAULT_STATUS:0x00000000
> [   75.211748] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID: CB/DB (0x0)
> [   75.211750] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x0
> [   75.211752] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x0
> [   75.211754] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x0
> [   75.211756] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x0
> [   75.211758] amdgpu 0000:03:00.0: amdgpu: RW: 0x0
> [   75.212337] amdgpu 0000:03:00.0: amdgpu: [gfxhub] page fault
> (src_id:0 ring:169 vmid:0 pasid:0, for process  pid 0 thread  pid 0)
> [   75.212344] amdgpu 0000:03:00.0: amdgpu:   in page starting at
> address 0x00008087fe5fd000 from client 10
> [   75.212348] amdgpu 0000:03:00.0: amdgpu:
> GCVM_L2_PROTECTION_FAULT_STATUS:0x00041B52
> [   75.212352] amdgpu 0000:03:00.0: amdgpu: Faulty UTCL2 client ID: SDMA0 (0xd)
> [   75.212356] amdgpu 0000:03:00.0: amdgpu: MORE_FAULTS: 0x0
> [   75.212359] amdgpu 0000:03:00.0: amdgpu: WALKER_ERROR: 0x1
> [   75.212363] amdgpu 0000:03:00.0: amdgpu: PERMISSION_FAULTS: 0x5
> [   75.212367] amdgpu 0000:03:00.0: amdgpu: MAPPING_ERROR: 0x1
> [   75.212370] amdgpu 0000:03:00.0: amdgpu: RW: 0x1
>
> The full kernel log attached below.

This patch should address the issue:
https://patchwork.freedesktop.org/patch/567101/
If you still see issues, you may also need this series:
https://patchwork.freedesktop.org/series/126220/

Alex