Re: [RFC PATCH 00/10] uaccess: Refuse and warn on user accesses when current->mm is NULL

[Arnd Bergmann]

On Tue, Oct 27, 2026, at 01:12, Arnd Bergmann wrote:
>
> E.g. on arm64 with CONFIG_ARM64_SW_TTBR0_PAN, the page table base for
> the current process is only set in user_access_begin() and would
> not point to any task here. Without ttbr0_pan, it should be
> covered by cpu_set_reserved_ttbr0() turning off all user space access
> for kernel threads.

correction: for non-sw_ttbr0_pan, enter_lazy_tlb() does nothing
on arm64, so it is the same as x86 and the others.

     Arnd