linux-kernel - [PATCH v8 4/4] kasan: update documentation for generic kasan

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Message-ID: <20200710162709.24036-1-walter-zh.wu@mediatek.com>
Date:   Sat, 11 Jul 2020 00:27:09 +0800
From:   Walter Wu <walter-zh.wu@...iatek.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Andrey Konovalov <andreyknvl@...gle.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        wsd_upstream <wsd_upstream@...iatek.com>,
        <linux-mediatek@...ts.infradead.org>,
        Walter Wu <walter-zh.wu@...iatek.com>,
        Jonathan Corbet <corbet@....net>
Subject: [PATCH v8 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 <walter-zh.wu@...iatek.com>
Reviewed-and-tested-by: Dmitry Vyukov <dvyukov@...gle.com>
Reviewed-by: Andrey Konovalov <andreyknvl@...gle.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Jonathan Corbet <corbet@....net>
---
 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