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[v4,6/6] kasan: update documentation for generic kasan

Message ID 20200924040650.31221-1-walter-zh.wu@mediatek.com (mailing list archive)
State New, archived
Headers show
Series kasan: add workqueue and timer stack for generic KASAN | expand

Commit Message

Walter Wu Sept. 24, 2020, 4:06 a.m. UTC 
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@mediatek.com>
Suggested-by: Marco Elver <elver@google.com>
Acked-by: Marco Elver <elver@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
---

v3:
- Thanks for Marco suggestion

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

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
 ~~~~~~~~~~~~~~~~~~~~~~~~