ACK: [SRU Focal 0/2] CVE-2021-4002

[Kleber Souza]

On 26.11.21 03:11, Thadeu Lima de Souza Cascardo wrote:
> https://www.openwall.com/lists/oss-security/2021/11/25/1
>
> [Impact]
> Missing TLB flush on hugetlb unmapping may allow a different process to
> access another process memory, as long as it is using hugetlb mappings.
>
> [Test case]
> POC from the link above was used to test it on amd64 and ppc64el (Power9).
>
> Built tested on other architectures too. Will test on them as time allows.
>
> [Potential regression]
> hugetlb users may regress.
>
> [Notice]
> 4.15 backport is in progress and will be tested on other architectures
> as well.
>
>
> Nadav Amit (1):
>    hugetlbfs: flush TLBs correctly after huge_pmd_unshare
>
> Peter Zijlstra (Intel) (1):
>    tlb: mmu_gather: add tlb_flush_*_range APIs
>
>   include/asm-generic/tlb.h | 55 ++++++++++++++++++++++++++++-----------
>   mm/hugetlb.c              | 23 +++++++++++++---
>   2 files changed, 59 insertions(+), 19 deletions(-)
>

Acked-by: Kleber Sacilotto de Souza <kleber.souza at canonical.com>

Thanks