On Thu, Jul 17, 2025 at 07:27:30PM +0500, Sabyrzhan Tasbolatov wrote:
> Call kasan_init_generic() which handles Generic KASAN initialization
> and prints the banner. Since s390 doesn't select ARCH_DEFER_KASAN,
> kasan_enable() will be a no-op, and kasan_enabled() will return
> IS_ENABLED(CONFIG_KASAN) for optimal compile-time behavior.
>
> s390 sets up KASAN mappings in the decompressor and can run with KASAN
> enabled from very early, so it doesn't need runtime control.
>
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217049
> Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com>
> ---
> arch/s390/kernel/early.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
> index 54cf0923050..7ada1324f6a 100644
> --- a/arch/s390/kernel/early.c
> +++ b/arch/s390/kernel/early.c
> @@ -21,6 +21,7 @@
> #include <linux/kernel.h>
> #include <asm/asm-extable.h>
> #include <linux/memblock.h>
> +#include <linux/kasan.h>
> #include <asm/access-regs.h>
> #include <asm/asm-offsets.h>
> #include <asm/machine.h>
> @@ -65,7 +66,7 @@ static void __init kasan_early_init(void)
> {
> #ifdef CONFIG_KASAN
> init_task.kasan_depth = 0;
> - pr_info("KernelAddressSanitizer initialized\n");
> + kasan_init_generic();
> #endif
> }
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>