> +static inline void *arch_kmsan_get_meta_or_null(void *addr, bool is_origin)
> +{
> + if (addr >= (void *)&S390_lowcore &&
> + addr < (void *)(&S390_lowcore + 1)) {
> + /*
> + * Different lowcores accessed via S390_lowcore are described
> + * by the same struct page. Resolve the prefix manually in
> + * order to get a distinct struct page.
> + */
> + addr += (void *)lowcore_ptr[raw_smp_processor_id()] -
> + (void *)&S390_lowcore;
> + return kmsan_get_metadata(addr, is_origin);
> + }
> + return NULL;
> +}
Is there a possibility for infinite recursion here? E.g. can
`lowcore_ptr[raw_smp_processor_id()]` point somewhere in between
`(void *)&S390_lowcore` and `(void *)(&S390_lowcore + 1))`?
