Re: [PATCH v5 14/15] mm/kasan: add document into kernel-parameters.txt

Samuel Holland
2026-03-12T12:54:01Z

Hi Baoquan,

On 2026-02-25 2:14 AM, Baoquan He wrote:
> And also remove the relevant description in dev-tools/kasan.rst
> which is hw_tags specificially.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 4 ++++
> Documentation/dev-tools/kasan.rst | 2 --
> 2 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index cb850e5290c2..e0115fad9e60 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2899,6 +2899,10 @@ Kernel parameters
> js= [HW,JOY] Analog joystick
> See Documentation/input/joydev/joystick.rst.
>
> + kasan= [KNL] controls whether KASAN is enabled.
> + Format: off | on
> + default: on
> +
> kasan_multi_shot
> [KNL] Enforce KASAN (Kernel Address Sanitizer) to print
> report on every invalid memory access. Without this
> diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
> index a034700da7c4..eaae83fcb5e4 100644
> --- a/Documentation/dev-tools/kasan.rst
> +++ b/Documentation/dev-tools/kasan.rst
> @@ -129,8 +129,6 @@ Hardware Tag-Based KASAN mode is intended for use in production as a security
> mitigation. Therefore, it supports additional boot parameters that allow
> disabling KASAN altogether or controlling its features:

The sentence above is now incorrect as well. I would recommend documenting the
parameter earlier in the "Boot parameters" section instead of removing it from
this document entirely.

Regards,
Samuel

>
> -- ``kasan=off`` or ``=on`` controls whether KASAN is enabled (default: ``on``).
> -
> - ``kasan.mode=sync``, ``=async`` or ``=asymm`` controls whether KASAN
> is configured in synchronous, asynchronous or asymmetric mode of
> execution (default: ``sync``).