APPLIED: [SRU Hirsute/Impish 0/1] CVE-2021-4002

[Kleber Souza]

On 26.11.21 02:02, 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.
>
> Built tested on other architectures so far. Will test on them as time allows.
>
> [Potential regression]
> hugetlb users may regress.
>
> [Notice]
> Other backports are in progress and will be tested on other architectures
> as well.
>
> Nadav Amit (1):
>    hugetlbfs: flush TLBs correctly after huge_pmd_unshare
>
>   mm/hugetlb.c | 23 +++++++++++++++++++----
>   1 file changed, 19 insertions(+), 4 deletions(-)
>

Applied to hirsute/impish:linux.

Thanks,
Kleber