Re: [PATCH v6 1/2] kasan/hw-tags: introduce kasan.write_only option

[Yeoreum Yun]

> On Mon,  1 Sep 2025 11:46:22 +0100 Yeoreum Yun <yeoreum.yun@xxxxxxx> wrote:
>
> > Since Armv8.9, FEATURE_MTE_STORE_ONLY feature is introduced to restrict
> > raise of tag check fault on store operation only.
> > Introcude KASAN write only mode based on this feature.
> >
> > KASAN write only mode restricts KASAN checks operation for write only and
> > omits the checks for fetch/read operations when accessing memory.
> > So it might be used not only debugging enviroment but also normal
> > enviroment to check memory safty.
> >
> > This features can be controlled with "kasan.write_only" arguments.
> > When "kasan.write_only=on", KASAN checks write operation only otherwise
> > KASAN checks all operations.
> >
> > This changes the MTE_STORE_ONLY feature as BOOT_CPU_FEATURE like
> > ARM64_MTE_ASYMM so that makes it initialise in kasan_init_hw_tags()
> > with other function together.
> >
> > ...
> >
> >
> > -	pr_info("KernelAddressSanitizer initialized (hw-tags, mode=%s, vmalloc=%s, stacktrace=%s)\n",
> > +	pr_info("KernelAddressSanitizer initialized (hw-tags, mode=%s, vmalloc=%s, stacktrace=%s, write_only=%s\n",
> >  		kasan_mode_info(),
>
> This lost the closing ")" in the printk control string.  I fixed that
> up while resolving rejects.

Oops.. Thanks and Sorry for my mistake :( ...

--
Sincerely,
Yeoreum Yun