ACK/Cmnt: [UBUNTU OEM-5.7 0/1] CVE-2022-2590

[Tim Gardner]

On 4/4/23 7:55 AM, Thadeu Lima de Souza Cascardo wrote:
> [Impact]
> Attackers can write to shmem files (on tmpfs, for example) without having write permissions.
> 
> [Fix]
> The upstream fix is not appropriate to 5.17 and the suggestion was to revert the offending commit.
> 
> [Test case]
> PoC was tested and stopped working with the revert applied.
> 
> Thadeu Lima de Souza Cascardo (1):
>    UBUNTU: SAUCE: Revert "mm/shmem: unconditionally set pte dirty in
>      mfill_atomic_install_pte"
> 
>   mm/shmem.c       | 1 +
>   mm/userfaultfd.c | 3 ++-
>   2 files changed, 3 insertions(+), 1 deletion(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>

Is this really a SAUCE patch ?
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Tim Gardner
Canonical, Inc