* [PATCH v5 4/4] kasan: update documentation for generic kasan
@ 2020-05-20 12:39 Walter Wu
0 siblings, 0 replies; only message in thread
From: Walter Wu @ 2020-05-20 12:39 UTC (permalink / raw)
To: Andrey Ryabinin, Alexander Potapenko, Dmitry Vyukov, Jonathan Corbet
Cc: kasan-dev, linux-mm, linux-kernel, linux-arm-kernel,
wsd_upstream, linux-mediatek, Walter Wu
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@mediatek.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Jonathan Corbet <corbet@lwn.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
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