Re: [PATCH stable/linux-5.10.y 0/7] Backport Fix incorrect overlayfs mmap() and mprotect() LSM access controls

[Amir Goldstein]

On Mon, Jun 29, 2026 at 8:38 AM Cai Xinchen <caixinchen1@xxxxxxxxxx> wrote:
>
> ackport the patch series
> "Fix incorrect overlayfs mmap() and mprotect() LSM access controls" [1]
> to 5.10 lts

Chai,

First of all, I don't think that stable maintainers are picking backports
to 5.10 that were not backported to 6.1 and 5.15.

Second, backporting backing_file as a dependency to LTS kernels is a pretty
intrusive change, so your description above is very much lacking.

Please do not backport backing_file to any of the LTS kernels without providing
detailed explanation to try and convince the vfs maintainers that you
verified this
bacport is safe for the LTS kernel, because honestly, this looks a bit
risky for me.

Thanks,
Amir.