[PATCH v3 1/2] ARM: mm: fix use-after-free in __do_user_fault() under CONFIG_DEBUG_USER

[Lorenzo Stoakes]

On Tue, Jul 07, 2026 at 12:57:45PM +0100, Russell King wrote:
> On Tue, Jul 07, 2026 at 07:48:12PM +0800, Qi Xi wrote:
> > You're right. And I think the fix is to simply skip show_pte() for kernel
> > addresses.
>
> No. This information is useful debug for kernel oops.

Yup see my reply, just upgrade it to an mmap write lock and you should be
safe to keep this.

>
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Cheers, Lorenzo