Fix kernel panic caused by legacy devices on AMD platforms

Bug #1936682 reported by Kai-Heng Feng
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
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linux (Ubuntu)
High
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Focal
Undecided
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Hirsute
High
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Impish
High
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linux-oem-5.10 (Ubuntu)
Undecided
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Focal
High
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Hirsute
Undecided
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Impish
Undecided
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linux-oem-5.13 (Ubuntu)
Undecided
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Focal
High
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Hirsute
Undecided
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Impish
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Bug Description

[Impact]
When a legacy device is only 32bit DMA capable and it's in the same
IOMMU group with iommu_v2 capable devices, the device in question will
be forced to use identity mapping and triggers kernel panic on DMA
operation because it can't do 64bit DMA.

[Fix]
Keep swiotlb enabled so legacy devices can do 64bit DMA. This is also
how Intel and ARM64 platforms deal with legacy devices.

[Test]
Boot an affected system. Kernel panic in Realtek WiFi driver's probe
routine.

After the patch is applied, the system can work normally.

[Where problems could occur]
The default swiotlb uses 64MB memory, so if the system doesn't have any
legacy device, there are 64MB ram less for the system to use.

CVE References

Changed in linux (Ubuntu Focal):
status: New → Won't Fix
Changed in linux (Ubuntu Hirsute):
status: New → Confirmed
Changed in linux (Ubuntu Impish):
status: New → Confirmed
Changed in linux (Ubuntu Hirsute):
importance: Undecided → High
Changed in linux (Ubuntu Impish):
importance: Undecided → High
Changed in linux-oem-5.10 (Ubuntu Focal):
status: New → Confirmed
importance: Undecided → High
Changed in linux-oem-5.10 (Ubuntu Hirsute):
status: New → Invalid
Changed in linux-oem-5.10 (Ubuntu Impish):
status: New → Invalid
Changed in linux-oem-5.13 (Ubuntu Focal):
importance: Undecided → High
status: New → Confirmed
Changed in linux-oem-5.13 (Ubuntu Hirsute):
status: New → Invalid
Changed in linux-oem-5.13 (Ubuntu Impish):
status: New → Invalid
tags: added: oem-priority originate-from-1933798 stella
AceLan Kao (acelankao)
Changed in linux-oem-5.10 (Ubuntu Focal):
status: Confirmed → Fix Committed
AceLan Kao (acelankao)
Changed in linux-oem-5.13 (Ubuntu Focal):
status: Confirmed → Fix Committed
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

This bug is awaiting verification that the 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-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

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!

tags: added: verification-needed-focal
tags: added: verification-done-focal
removed: verification-needed-focal
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux-oem-5.10 - 5.10.0-1044.46

---------------
linux-oem-5.10 (5.10.0-1044.46) focal; urgency=medium

  * focal/linux-oem-5.10: 5.10.0-1044.46 -proposed tracker (LP: #1939533)

  * mute/micmute LEDs no function on HP ProBook 650 G8 (LP: #1939473)
    - SAUCE: ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8
      Notebook PC

 -- Chia-Lin Kao (AceLan) <email address hidden> Wed, 11 Aug 2021 17:35:07 +0800

Changed in linux-oem-5.10 (Ubuntu Focal):
status: Fix Committed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (5.6 KiB)

This bug was fixed in the package linux-oem-5.13 - 5.13.0-1010.11

---------------
linux-oem-5.13 (5.13.0-1010.11) focal; urgency=medium

  * focal/linux-oem-5.13: 5.13.0-1010.11 -proposed tracker (LP: #1937217)

  * Packaging resync (LP: #1786013)
    - [Packaging] update update.conf, follow impish

  * [SRU][OEM-5.13/U] Fix firmware reload failure of MT7921 (LP: #1936790)
    - mt76: mt7921: continue to probe driver when fw already downloaded

  * Backport support for AMD SMU statistics (LP: #1934809)
    - platform/x86: amd-pmc: Fix command completion code
    - platform/x86: amd-pmc: Fix SMU firmware reporting mechanism
    - platform/x86: amd-pmc: call dump registers only once
    - platform/x86: amd-pmc: Add support for logging SMU metrics
    - platform/x86: amd-pmc: Add support for logging s0ix counters
    - platform/x86: amd-pmc: Add support for ACPI ID AMDI0006
    - platform/x86: amd-pmc: Add new acpi id for future PMC controllers
    - platform/x86: amd-pmc: Use return code on suspend
    - platform/x86: amd-pmc: Fix missing unlock on error in amd_pmc_send_cmd()
    - platform/x86: amd-pmc: Fix undefined reference to __udivdi3

  * Skip rtcpie test in kselftests/timers if the default RTC device does not
    exist (LP: #1937991)
    - selftests: timers: rtcpie: skip test if default RTC device does not exist

  * Support AMD W6600 [1002:73E3] (LP: #1938145)
    - drm/amdgpu: add new dimgrey cavefish DID

  * Add additional Mediatek MT7921 WiFi/BT device IDs (LP: #1937004)
    - Bluetooth: btusb: Fixed too many in-token issue for Mediatek Chip.
    - Bluetooth: btusb: Add support for Lite-On Mediatek Chip
    - Bluetooth: btusb: fix memory leak
    - SAUCE: Bluetooth: btusb: Add Mediatek MT7921 support for Foxconn
    - SAUCE: Bluetooth: btusb: Add Mediatek MT7921 support for IMC Network
    - SAUCE: Bluetooth: btusb: Add support for Foxconn Mediatek Chip

  * Add new PCI MMIO based thermal driver [8086:461d] for Intel Alder Lake
    (LP: #1934741)
    - thermal/drivers/int340x/processor_thermal: Split enumeration and processing
      part
    - thermal/drivers/int340x/processor_thermal: Add PCI MMIO based thermal driver

  * On TGL platforms screen shows garbage when browsing website by scrolling
    mouse (LP: #1926579)
    - drm/i915/display: Disable PSR2 if TGL Display stepping is B1 from A0

  * Fix kernel panic caused by legacy devices on AMD platforms (LP: #1936682)
    - SAUCE: iommu/amd: Keep swiotlb enabled to ensure devices with 32bit DMA
      still work

  * Fix display output on HP hybrid GFX laptops (LP: #1936296)
    - drm/i915: Invoke another _DSM to enable MUX on HP Workstation laptops

  * Add support for AMD BCL DID (LP: #1936785)
    - SAUCE: drm/amdgpu: add another Renior DID

  * e1000e blocks the boot process when it tried to write checksum to its NVM
    (LP: #1936998)
    - SAUCE: e1000e: Do not take care about recovery NVM checksum

  * Mute/mic LEDs no function on some HP platfroms (LP: #1934878)
    - ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 450 G8
    - ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 445 G8
    - ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 630 G8

  * ...

Read more...

Changed in linux-oem-5.13 (Ubuntu Focal):
status: Fix Committed → Fix Released
Changed in linux (Ubuntu Hirsute):
status: Confirmed → Fix Committed
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

This bug is awaiting verification that the 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-hirsute' to 'verification-done-hirsute'. If the problem still exists, change the tag 'verification-needed-hirsute' to 'verification-failed-hirsute'.

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!

tags: added: verification-needed-hirsute
tags: added: verification-done-hirsute
removed: verification-needed-hirsute
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux - 5.13.0-16.16

---------------
linux (5.13.0-16.16) impish; urgency=medium

  * impish/linux: 5.13.0-16.16 -proposed tracker (LP: #1942611)

  * Miscellaneous Ubuntu changes
    - [Config] update toolchain in configs

  * Miscellaneous upstream changes
    - Revert "UBUNTU: [Config] Enable CONFIG_UBSAN_BOUNDS"

 -- Andrea Righi <email address hidden> Fri, 03 Sep 2021 16:21:14 +0200

Changed in linux (Ubuntu Impish):
status: Confirmed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (68.6 KiB)

This bug was fixed in the package linux - 5.11.0-37.41

---------------
linux (5.11.0-37.41) hirsute; urgency=medium

  * hirsute/linux: 5.11.0-37.41 -proposed tracker (LP: #1944180)

  * CVE-2021-41073
    - io_uring: ensure symmetry in handling iter types in loop_rw_iter()

  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2021.09.06)

  * LRMv5: switch primary version handling to kernel-versions data set
    (LP: #1928921)
    - [Packaging] switch to kernel-versions

  * disable “CONFIG_HISI_DMA” config for ubuntu version (LP: #1936771)
    - Disable CONFIG_HISI_DMA
    - [Config] Record hisi_dma no longer built for arm64

  * ubunut_kernel_selftests: memory-hotplug: avoid spamming logs with
    dump_page() (LP: #1941829)
    - selftests: memory-hotplug: avoid spamming logs with dump_page(), ratio limit
      hot-remove error test

  * alsa: the soundwire audio doesn't work on the Dell TGL-H machines
    (LP: #1941669)
    - ASoC: SOF: allow soundwire use desc->default_fw_filename
    - ASoC: Intel: tgl: remove sof_fw_filename set for tgl_3_in_1_default

  * e1000e blocks the boot process when it tried to write checksum to its NVM
    (LP: #1936998)
    - e1000e: Do not take care about recovery NVM checksum

  * Dell XPS 17 (9710) PCI/internal sound card not detected (LP: #1935850)
    - ASoC: Intel: sof_sdw: include rt711.h for RT711 JD mode
    - ASoC: Intel: sof_sdw: add quirk for Dell XPS 9710

  * mute/micmute LEDs no function on HP ProBook 650 G8 (LP: #1939473)
    - ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8 Notebook PC

  * Fix mic noise on HP ProBook 445 G8 (LP: #1940610)
    - ALSA: hda/realtek: Limit mic boost on HP ProBook 445 G8

  * GPIO error logs in start and dmesg after update of kernel (LP: #1937897)
    - ODM: mfd: Check AAEON BFPI version before adding device

  * External displays not working on Thinkpad T490 with ThinkPad Thunderbolt 3
    Dock (LP: #1938999)
    - drm/i915/ilk-glk: Fix link training on links with LTTPRs

  * Fix kernel panic caused by legacy devices on AMD platforms (LP: #1936682)
    - SAUCE: iommu/amd: Keep swiotlb enabled to ensure devices with 32bit DMA
      still work

  * Hirsute update: upstream stable patchset 2021-08-30 (LP: #1942123)
    - drm/i915: Revert "drm/i915/gem: Asynchronous cmdparser"
    - Revert "drm/i915: Propagate errors on awaiting already signaled fences"
    - regulator: rtmv20: Fix wrong mask for strobe-polarity-high
    - regulator: rt5033: Fix n_voltages settings for BUCK and LDO
    - spi: stm32h7: fix full duplex irq handler handling
    - ASoC: tlv320aic31xx: fix reversed bclk/wclk master bits
    - r8152: Fix potential PM refcount imbalance
    - qed: fix possible unpaired spin_{un}lock_bh in _qed_mcp_cmd_and_union()
    - ASoC: rt5682: Fix the issue of garbled recording after powerd_dbus_suspend
    - net: Fix zero-copy head len calculation.
    - ASoC: ti: j721e-evm: Fix unbalanced domain activity tracking during startup
    - ASoC: ti: j721e-evm: Check for not initialized parent_clk_id
    - efi/mokvar: Reserve the table only if it is in boot services data
    - nvme: fix nvme_setup_command ...

Changed in linux (Ubuntu Hirsute):
status: Fix Committed → Fix Released
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