amdgpu hangs on DCN 3.5 at bootup: RIP: 0010:dcn35_clk_mgr_construct+0x183/0x2210 [amdgpu]

[You-Sheng Yang]

[SRU Justification]

BugLink: https://bugs.launchpad.net/bugs/2066233

[Impact]

Newer VBIOS on DCN 3.5 bumped the version of IntegratedInfo table from 2.2 to 2.3. This version uses same structure. Version 2.3 is missing from the construct_integrated_info() parser, so it leads to NULL pointer dereference.

```
Call Trace:
<TASK>
? show_regs+0x72/0x90
? __die+0x25/0x80
? page_fault_oops+0x154/0x4c0
? ttm_bo_kmap+0x11d/0x310 [ttm]
? dma_resv_wait_timeout+0x48/0xe0
? do_user_addr_fault+0x30e/0x6e0
? exc_page_fault+0x84/0x1b0
? asm_exc_page_fault+0x27/0x30
? dcn35_clk_mgr_construct+0x183/0x2210 [amdgpu]
? dcn35_clk_mgr_construct+0x15a/0x2210 [amdgpu]
? dcn35_hwseq_create+0x23/0x470 [amdgpu]
```

[Fix]

Fix landed to upstream v6.9-rc7: 9a35d205f466 ("drm/amd/display: Atom Integrated System Info v2_2 for DCN35")

[Test Case]

AMDGPU should then be initialized successfully without NULL pointer deref dump at boot.

[Where problems could occur]

No. New hardware revision with same data only.

[Other Info]

While this has been landed to v6.9-rc7, expect every kernel version older than that with planned support to the new VBIOS update should be fixed. So far linux/noble and linux-oem-6.8/noble are nominated by chip vendor.

========== original bug report ==========

Newer VBIOS on DCN 3.5 bumped the version of IntegratedInfo table from 2.2 to 2.3. This version uses same structure. Version 2.3 is missing from the construct_integrated_info() parser, so it leads to NULL pointer dereference.

[Thu May 9 18:02:38 2024] Call Trace:
[Thu May 9 18:02:38 2024] <TASK>
[Thu May 9 18:02:38 2024] ? show_regs+0x72/0x90
[Thu May 9 18:02:38 2024] ? __die+0x25/0x80
[Thu May 9 18:02:38 2024] ? page_fault_oops+0x154/0x4c0
[Thu May 9 18:02:38 2024] ? ttm_bo_kmap+0x11d/0x310 [ttm]
[Thu May 9 18:02:38 2024] ? dma_resv_wait_timeout+0x48/0xe0
[Thu May 9 18:02:38 2024] ? do_user_addr_fault+0x30e/0x6e0
[Thu May 9 18:02:38 2024] ? exc_page_fault+0x84/0x1b0
[Thu May 9 18:02:38 2024] ? asm_exc_page_fault+0x27/0x30
[Thu May 9 18:02:38 2024] ? dcn35_clk_mgr_construct+0x183/0x2210 [amdgpu]
[Thu May 9 18:02:38 2024] ? dcn35_clk_mgr_construct+0x15a/0x2210 [amdgpu]
[Thu May 9 18:02:38 2024] ? dcn35_hwseq_create+0x23/0x470 [amdgpu]
...

Fix landed to upstream v6.9-rc7: 9a35d205f466 ("drm/amd/display: Atom Integrated System Info v2_2 for DCN35")

[You-Sheng Yang (vicamo)]

SRU:
* https://kernel.ubuntu.com/gitea/kernel/noble-linux-oem/pulls/9 (oem-6.8)

[Timo Aaltonen (tjaalton)]

oracular has 6.8 still, how is this fixed there?

[You-Sheng Yang (vicamo)]

SRU: https://lists.ubuntu.com/archives/kernel-team/2024-June/151628.html (noble)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-oem-6.8/6.8.0-1007.7 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-noble-linux-oem-6.8' to 'verification-done-noble-linux-oem-6.8'. If the problem still exists, change the tag 'verification-needed-noble-linux-oem-6.8' to 'verification-failed-noble-linux-oem-6.8'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-6.8 - 6.8.0-1007.7

---------------
linux-oem-6.8 (6.8.0-1007.7) noble; urgency=medium

  * noble/linux-oem-6.8: 6.8.0-1007.7 -proposed tracker (LP: #2068142)

  * Packaging resync (LP: #1786013)
    - [Packaging] Replace fs/cifs with fs/smb in inclusion list

  * Panels show garbage or flickering when i915.psr2 enabled (LP: #2069993)
    - SAUCE: drm/i915/display/psr: add a psr2 disable quirk table
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x4d_0x10_0x93_0x15
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x8b_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x78_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x30_0xe4_0x8c_0x07
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x06_0xaf_0x9a_0xf9
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x4d_0x10_0x8f_0x15
    - SAUCE: drm/i915/display/psr: disable psr2 for panel_0x06_0xaf_0xa3_0xc3

  * FPS of glxgear with fullscreen is too low on MTL platform (LP: #2069380)
    - drm/i915: Bypass LMEMBAR/GTTMMADR for MTL stolen memory access

  * amdgpu hangs on DCN 3.5 at bootup: RIP:
    0010:dcn35_clk_mgr_construct+0x183/0x2210 [amdgpu] (LP: #2066233)
    - drm/amd/display: Atom Integrated System Info v2_2 for DCN35

  [ Ubuntu: 6.8.0-36.36 ]

  * noble/linux: 6.8.0-36.36 -proposed tracker (LP: #2068150)
  * CVE-2024-26924
    - netfilter: nft_set_pipapo: do not free live element

  [ Ubuntu: 6.8.0-35.35 ]

  * noble/linux: 6.8.0-35.35 -proposed tracker (LP: #2065886)
  * CVE-2024-21823
    - VFIO: Add the SPR_DSA and SPR_IAX devices to the denylist
    - dmaengine: idxd: add a new security check to deal with a hardware erratum
    - dmaengine: idxd: add a write() method for applications to submit work

 -- Kuan-Ying Lee <email address hidden> Wed, 26 Jun 2024 14:17:06 +0800