linux-kernel - [PATCH v3 6/6] kasan: update documentation for generic kasan

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Message-ID: <20200825020208.28950-1-walter-zh.wu@mediatek.com>
Date:   Tue, 25 Aug 2020 10:02:08 +0800
From:   Walter Wu <walter-zh.wu@...iatek.com>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jonathan Corbet <corbet@....net>
CC:     <kasan-dev@...glegroups.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>
Subject: [PATCH v3 6/6] kasan: update documentation for generic kasan

Generic KASAN also supports to record the last two timer and workqueue
stacks and print them in KASAN report. So that need to update
documentation.

Signed-off-by: Walter Wu <walter-zh.wu@...iatek.com>
Suggested-by: Marco Elver <elver@...gle.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Jonathan Corbet <corbet@....net>
---

v3:
- Thanks for Macro suggestion

---
 Documentation/dev-tools/kasan.rst | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index 38fd5681fade..698ccb65e634 100644
--- a/Documentation/dev-tools/kasan.rst
+++ b/Documentation/dev-tools/kasan.rst
@@ -190,8 +190,9 @@ 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.
+Generic KASAN also reports the last 2 call stacks to creation of work that
+potentially has access to an object. Call stacks for the following are shown:
+call_rcu(), timer and workqueue queuing.
 
 Software tag-based KASAN
 ~~~~~~~~~~~~~~~~~~~~~~~~
-- 
2.18.0