Public bug reported:
[Impact]
If trying to boot a system with PMEM:
"Unknown memory type 14, considering reserved"
The system will then not have access to EFIPresistentMemory ranges,
because grub could not hand them over to the kernel to use. The
resulting system would be missing a /dev/pmemN device.
Grub requires 4 cherry-picked commits:
- debian/patches/git_pmem_really_mark_mem_reserved_3d2c8048.patch
- debian/patches/git_pmem_translate_persistent_type_76ce1de7.patch
- debian/patches/git_pmem_mmap_handle_pmem_c79c59f1.patch
- debian/patches/git_pmem_efiemu_handle_pmem_ae3b83a4.patch
[Test case]
- Boot PMEM-enabled system with updated grub
[Regression Potential]
This changes handling of memory ranges in grub, and may lead to incorrectly
passing memory to the kernel, or otherwise allowing allocation of memory within
reserved ranges. This would typically lead to a failure to boot the kernel, or
missing memory-based devices (such a missing /dev/pmem0).
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: Fix Released
** Affects: grub2 (Ubuntu Xenial)
Importance: Critical
Assignee: Mathieu Trudel-Lapierre (cyphermox)
Status: In Progress
** Affects: grub2 (Ubuntu Zesty)
Importance: High
Assignee: Mathieu Trudel-Lapierre (cyphermox)
Status: Triaged
** Affects: grub2 (Ubuntu Artful)
Importance: Undecided
Status: Fix Released
** Also affects: grub2 (Ubuntu Artful)
Importance: Undecided
Status: New
** Also affects: grub2 (Ubuntu Zesty)
Importance: Undecided
Status: New
** Also affects: grub2 (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: grub2 (Ubuntu Artful)
Status: New => Fix Released
** Changed in: grub2 (Ubuntu Xenial)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: grub2 (Ubuntu Xenial)
Importance: Undecided => Critical
** Changed in: grub2 (Ubuntu Xenial)
Status: New => Triaged
** Changed in: grub2 (Ubuntu Zesty)
Status: New => Triaged
** Changed in: grub2 (Ubuntu Zesty)
Importance: Undecided => High
** Changed in: grub2 (Ubuntu Zesty)
Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)
** Changed in: grub2 (Ubuntu Xenial)
Status: Triaged => In Progress
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https://bugs.launchpad.net/bugs/1716424
Title:
correctly parse PMEM memory ranges to pass it to the kernel
Status in grub2 package in Ubuntu:
Fix Released
Status in grub2 source package in Xenial:
In Progress
Status in grub2 source package in Zesty:
Triaged
Status in grub2 source package in Artful:
Fix Released
Bug description:
[Impact]
If trying to boot a system with PMEM:
"Unknown memory type 14, considering reserved"
The system will then not have access to EFIPresistentMemory ranges,
because grub could not hand them over to the kernel to use. The
resulting system would be missing a /dev/pmemN device.
Grub requires 4 cherry-picked commits:
- debian/patches/git_pmem_really_mark_mem_reserved_3d2c8048.patch
- debian/patches/git_pmem_translate_persistent_type_76ce1de7.patch
- debian/patches/git_pmem_mmap_handle_pmem_c79c59f1.patch
- debian/patches/git_pmem_efiemu_handle_pmem_ae3b83a4.patch
[Test case]
- Boot PMEM-enabled system with updated grub
[Regression Potential]
This changes handling of memory ranges in grub, and may lead to incorrectly
passing memory to the kernel, or otherwise allowing allocation of memory within
reserved ranges. This would typically lead to a failure to boot the kernel, or
missing memory-based devices (such a missing /dev/pmem0).
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1716424/+subscriptions
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