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From: Alex Deucher <alexdeucher@gmail.com>
Date: Tue, 9 Apr 2024 00:23:05 -0400
Message-ID: <CADnq5_PKoX9G8jD=m1WnX3nxd_+GL_xi03_Dgq8HK6Diw3=JsQ@mail.gmail.com>
Subject: Re: 6.5.5: UBSAN: radeon_atombios.c: index 1 is out of range for type
 'UCHAR [1]'
To: Kees Cook <kees@kernel.org>
Cc: Jeff Johnson <quic_jjohnson@quicinc.com>, Justin Piszcz <jpiszcz@lucidpixels.com>, 
	Bagas Sanjaya <bagasdotme@gmail.com>, "Pan, Xinhui" <Xinhui.Pan@amd.com>, 
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Linux AMDGPU <amd-gfx@lists.freedesktop.org>, 
	Alex Deucher <alexander.deucher@amd.com>, Dave Airlie <airlied@redhat.com>, 
	=?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>, 
	Kees Cook <keescook@chromium.org>
Content-Type: text/plain; charset="UTF-8"
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On Mon, Apr 8, 2024 at 9:45=E2=80=AFPM Kees Cook <kees@kernel.org> wrote:
>
>
>
> On April 8, 2024 5:45:29 PM PDT, Jeff Johnson <quic_jjohnson@quicinc.com>=
 wrote:
> >On 10/1/23 17:12, Justin Piszcz wrote:
> >>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
> >>>> [Sun Oct  1 15:59:04 2023] UBSAN: array-index-out-of-bounds in
> >>>> drivers/gpu/drm/radeon/radeon_atombios.c:2620:43
> >>>> [Sun Oct  1 15:59:04 2023] index 1 is out of range for type 'UCHAR [=
1]'
> >>>> [Sun Oct  1 15:59:04 2023] CPU: 5 PID: 1 Comm: swapper/0 Tainted: G
> >>>>              T  6.5.5 #13 55df8de52754ef95effc50a55e9206abdea304ac
> >>>> [Sun Oct  1 15:59:04 2023] Hardware name: Supermicro X9SRL-F/X9SRL-F=
,
> >>>> BIOS 3.3 11/13/2018
> >>>> [Sun Oct  1 15:59:04 2023] Call Trace:
> >>>> [Sun Oct  1 15:59:04 2023]  <TASK>
> >>>> [Sun Oct  1 15:59:04 2023]  dump_stack_lvl+0x36/0x50
> >>>> [Sun Oct  1 15:59:04 2023]  __ubsan_handle_out_of_bounds+0xc7/0x110
> >>>> [Sun Oct  1 15:59:04 2023]  radeon_atombios_get_power_modes+0x87a/0x=
8f0
> >>>> [Sun Oct  1 15:59:04 2023]  radeon_pm_init+0x13a/0x7e0
> >>>> [Sun Oct  1 15:59:04 2023]  evergreen_init+0x13d/0x3d0
> >>>> [Sun Oct  1 15:59:04 2023]  radeon_device_init+0x60a/0xbf0
> >>>> [Sun Oct  1 15:59:04 2023]  radeon_driver_load_kms+0xb1/0x250
> >>>> [Sun Oct  1 15:59:04 2023]  drm_dev_register+0xfc/0x250
> >>>> [Sun Oct  1 15:59:04 2023]  radeon_pci_probe+0xd0/0x150
> >>>> [Sun Oct  1 15:59:04 2023]  pci_device_probe+0x97/0x130
> >>>> [Sun Oct  1 15:59:04 2023]  really_probe+0xbe/0x2f0
> >>>> [Sun Oct  1 15:59:04 2023]  ? __pfx___driver_attach+0x10/0x10
> >>>> [Sun Oct  1 15:59:04 2023]  __driver_probe_device+0x6e/0x120
> >>>> [Sun Oct  1 15:59:04 2023]  driver_probe_device+0x1a/0x90
> >>>> [Sun Oct  1 15:59:04 2023]  __driver_attach+0xd4/0x170
> >>>> [Sun Oct  1 15:59:04 2023]  bus_for_each_dev+0x87/0xe0
> >>>> [Sun Oct  1 15:59:04 2023]  bus_add_driver+0xf3/0x1f0
> >>>> [Sun Oct  1 15:59:04 2023]  driver_register+0x58/0x120
> >>>> [Sun Oct  1 15:59:04 2023]  ? __pfx_radeon_module_init+0x10/0x10
> >>>> [Sun Oct  1 15:59:04 2023]  do_one_initcall+0x93/0x4a0
> >>>> [Sun Oct  1 15:59:04 2023]  kernel_init_freeable+0x301/0x580
> >>>> [Sun Oct  1 15:59:04 2023]  ? __pfx_kernel_init+0x10/0x10
> >>>> [Sun Oct  1 15:59:04 2023]  kernel_init+0x15/0x1b0
> >>>> [Sun Oct  1 15:59:04 2023]  ret_from_fork+0x2f/0x50
> >>>> [Sun Oct  1 15:59:04 2023]  ? __pfx_kernel_init+0x10/0x10
> >>>> [Sun Oct  1 15:59:04 2023]  ret_from_fork_asm+0x1b/0x30
> >>>> [Sun Oct  1 15:59:04 2023]  </TASK>
> >>>> [Sun Oct  1 15:59:04 2023]
> >>>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
> >>>> [Sun Oct  1 15:59:04 2023] [drm] radeon: dpm initialized
> >>>> [Sun Oct  1 15:59:04 2023] [drm] GART: num cpu pages 262144, num gpu
> >>>> pages 262144
> >>>> [Sun Oct  1 15:59:04 2023] [drm] enabling PCIE gen 2 link speeds,
> >>>> disable with radeon.pcie_gen2=3D0
> >>>> [Sun Oct  1 15:59:04 2023] [drm] PCIE GART of 1024M enabled (table a=
t
> >>>> 0x000000000014C000).
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: WB enabled
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: fence driver on ring=
 0
> >>>> use gpu addr 0x0000000040000c00
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: fence driver on ring=
 3
> >>>> use gpu addr 0x0000000040000c0c
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: fence driver on ring=
 5
> >>>> use gpu addr 0x000000000005c418
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: radeon: MSI limited =
to 32-bit
> >>>> [Sun Oct  1 15:59:04 2023] radeon 0000:03:00.0: radeon: using MSI.
> >>>> [Sun Oct  1 15:59:04 2023] [drm] radeon: irq initialized.
> >>>>
> >>>
> >>> Please also open an issue on freedesktop tracker [1].
> >>>
> >>> Thanks.
> >>>
> >>> [1]: https://gitlab.freedesktop.org/drm/amd/-/issues
> >>
> >> Issue opened: https://gitlab.freedesktop.org/drm/amd/-/issues/2894
> >>
> >> Regards,
> >> Justin
> >
> >+Kees since I've worked with him on several of these flexible array issu=
es.
> >
> >I just happened to look at kernel logs today for my ath1*k driver mainte=
nance and see the subject issue is present on my device, running 6.9.0-rc1.=
 The freedesktop issue tracker says the issue is closed, but any fix has no=
t landed in the upstream kernel. Is there a -next patch somewhere?
> >
> >[   12.105270] UBSAN: array-index-out-of-bounds in drivers/gpu/drm/radeo=
n/radeon_atombios.c:2718:34
> >[   12.105272] index 48 is out of range for type 'UCHAR [1]'
> >[
> >
> >If there isn't really an upstream fix, I can probably supply one.
>
> I would expect this to have fixed it:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit=
/drivers/gpu/drm/radeon/pptable.h?id=3Dc63079c61177ba1b17fa05c6875699a36924=
fe39
>
> If not, there must be something else happening?

This patch should silence it I think:
https://patchwork.freedesktop.org/patch/588305/

Alex

>
> -Kees
>
> --
> Kees Cook