Use memblock quirk instead of delayed allocation for GICv3 LPI tables

Bug #1816425 reported by dann frazier on 2019-02-18
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Undecided
Unassigned
Cosmic
Undecided
Unassigned
Disco
Undecided
Unassigned

Bug Description

[Impact]
The fix for LP: #1806766 has the issue that the persistent memory reservations for the GICv3 LPI tables may have been allocated an overwritten by the time we get to reserving them. This can continue to break kdump in certain conditions.

[Test Case]
sudo apt install linux-crashdump
echo 'GRUB_CMDLINE_LINUX_DEFAULT="$GRUB_CMDLINE_LINUX_DEFAULT crashkernel=512M"' | \
  sudo tee /etc/default/grub.d/kdump-tools.cfg
sudo update-grub
sudo reboot
echo 1 | sudo tee /proc/sys/kernel/sysrq
echo c | sudo tee /proc/sysrq-trigger

[Fix]
582a32e708823 efi/arm: Revert "Defer persistent reservations until after paging_init()"
8a5b403d71aff arm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve table

[Regression Risk]
The change in reserved regions only impacts arm64.

dann frazier (dannf) on 2019-02-18
Changed in linux (Ubuntu Cosmic):
status: New → In Progress
Changed in linux (Ubuntu Disco):
status: New → In Progress
Seth Forshee (sforshee) on 2019-02-22
Changed in linux (Ubuntu Disco):
status: In Progress → Fix Committed
Changed in linux (Ubuntu Cosmic):
status: In Progress → Fix Committed
Brad Figg (brad-figg) 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-cosmic' to 'verification-done-cosmic'. If the problem still exists, change the tag 'verification-needed-cosmic' to 'verification-failed-cosmic'.

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-cosmic
dann frazier (dannf) wrote :

Verified - I was able to successfully crash dump a cosmic system.

tags: added: verification-done-cosmic
removed: verification-needed-cosmic
Launchpad Janitor (janitor) wrote :
Download full text (5.0 KiB)

This bug was fixed in the package linux - 4.18.0-17.18

---------------
linux (4.18.0-17.18) cosmic; urgency=medium

  * linux: 4.18.0-17.18 -proposed tracker (LP: #1819624)

  * Packaging resync (LP: #1786013)
    - [Packaging] resync getabis
    - [Packaging] update helper scripts

  * C++ demangling support missing from perf (LP: #1396654)
    - [Packaging] fix a mistype

  * arm-smmu-v3 arm-smmu-v3.3.auto: CMD_SYNC timeout (LP: #1818162)
    - iommu/arm-smmu-v3: Fix unexpected CMD_SYNC timeout

  * Crash in nvme_irq_check() when using threaded interrupts (LP: #1818747)
    - nvme-pci: fix out of bounds access in nvme_cqe_pending

  * CVE-2019-9003
    - ipmi: fix use-after-free of user->release_barrier.rda

  * CVE-2019-9162
    - netfilter: nf_nat_snmp_basic: add missing length checks in ASN.1 cbs

  * CVE-2019-9213
    - mm: enforce min addr even if capable() in expand_downwards()

  * CVE-2019-3460
    - Bluetooth: Check L2CAP option sizes returned from l2cap_get_conf_opt

  * tun/tap: unable to manage carrier state from userland (LP: #1806392)
    - tun: implement carrier change

  * CVE-2019-8980
    - exec: Fix mem leak in kernel_read_file

  * [Packaging] Allow overlay of config annotations (LP: #1752072)
    - [Packaging] config-check: Add an include directive

  * amdgpu with mst WARNING on blanking (LP: #1814308)
    - drm/amd/display: Fix MST dp_blank REG_WAIT timeout

  * CVE-2019-7308
    - bpf: move {prev_,}insn_idx into verifier env
    - bpf: move tmp variable into ax register in interpreter
    - bpf: enable access to ax register also from verifier rewrite
    - bpf: restrict map value pointer arithmetic for unprivileged
    - bpf: restrict stack pointer arithmetic for unprivileged
    - bpf: restrict unknown scalars of mixed signed bounds for unprivileged
    - bpf: fix check_map_access smin_value test when pointer contains offset
    - bpf: prevent out of bounds speculation on pointer arithmetic
    - bpf: fix sanitation of alu op with pointer / scalar type from different
      paths
    - bpf: add various test cases to test_verifier
    - bpf: add various test cases to selftests

  * CVE-2017-5753
    - bpf: fix inner map masking to prevent oob under speculation

  * Use memblock quirk instead of delayed allocation for GICv3 LPI tables
    (LP: #1816425)
    - efi/arm: Revert "Defer persistent reservations until after paging_init()"
    - arm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve
      table

  * efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted (LP: #1814982)
    - efi/arm/arm64: Allow SetVirtualAddressMap() to be omitted

  * Update ENA driver to version 2.0.3K (LP: #1816806)
    - net: ena: update driver version from 2.0.2 to 2.0.3
    - net: ena: fix race between link up and device initalization
    - net: ena: fix crash during failed resume from hibernation

  * Silent "Unknown key" message when pressing keyboard backlight hotkey
    (LP: #1817063)
    - platform/x86: dell-wmi: Ignore new keyboard backlight change event

  * CVE-2018-19824
    - ALSA: usb-audio: Fix UAF decrement if card has no live interfaces in card.c

  * CVE-2019-3459
    - Bluetooth: Verify that l2cap_get...

Read more...

Changed in linux (Ubuntu Cosmic):
status: Fix Committed → Fix Released
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers