2020-05-22 02:06:18

by Walter Wu

Subject: [PATCH v6 4/4] kasan: update documentation for generic kasan

Generic KASAN will support to record the last two call_rcu() call stacks
and print them in KASAN report. So that need to update documentation.

Signed-off-by: Walter Wu <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Jonathan Corbet <[email protected]>
---
Documentation/dev-tools/kasan.rst | 3 +++
1 file changed, 3 insertions(+)

diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index c652d740735d..fede42e6536b 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -193,6 +193,9 @@ function calls GCC directly inserts the code to check the shadow memory.
This option significantly enlarges kernel but it gives x1.1-x2 performance
boost over outline instrumented kernel.

+Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one
+and the second to last.
+
Software tag-based KASAN
~~~~~~~~~~~~~~~~~~~~~~~~

--
2.18.0

2020-05-25 10:00:41

by Dmitry Vyukov

Subject: Re: [PATCH v6 4/4] kasan: update documentation for generic kasan

On Fri, May 22, 2020 at 4:02 AM Walter Wu <[email protected]> wrote:
>
> Generic KASAN will support to record the last two call_rcu() call stacks
> and print them in KASAN report. So that need to update documentation.

Reviewed-and-tested-by: Dmitry Vyukov <[email protected]>

> Signed-off-by: Walter Wu <[email protected]>
> Cc: Andrey Ryabinin <[email protected]>
> Cc: Dmitry Vyukov <[email protected]>
> Cc: Alexander Potapenko <[email protected]>
> Cc: Jonathan Corbet <[email protected]>
> ---
> Documentation/dev-tools/kasan.rst | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
> index c652d740735d..fede42e6536b 100644
> --- a/Documentation/dev-tools/kasan.rst
> +++ b/Documentation/dev-tools/kasan.rst
> @@ -193,6 +193,9 @@ function calls GCC directly inserts the code to check the shadow memory.
> This option significantly enlarges kernel but it gives x1.1-x2 performance
> boost over outline instrumented kernel.
>
> +Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one
> +and the second to last.
> +
> Software tag-based KASAN
> ~~~~~~~~~~~~~~~~~~~~~~~~
>
> --
> 2.18.0
>
> --
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