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* [PATCH v7 4/4] kasan: update documentation for generic kasan
@ 2020-06-01  5:11 Walter Wu
  0 siblings, 0 replies; only message in thread
From: Walter Wu @ 2020-06-01  5:11 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 <>
Reviewed-and-tested-by: Dmitry Vyukov <>
Reviewed-by: Andrey Konovalov <>
Cc: Andrey Ryabinin <>
Cc: Alexander Potapenko <>
Cc: Jonathan Corbet <>
 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

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