The patch titled
Subject: kasan: update documentation for generic kasan
has been added to the -mm tree. Its filename is
kasan-update-documentation-for-generic-kasan.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-update-documentation-for-generic-kasan.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-update-documentation-for-generic-kasan.patch
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------------------------------------------------------
From: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Subject: 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.
Link: http://lkml.kernel.org/r/20200601051111.1359-1-walter-zh.wu@xxxxxxxxxxxx
Signed-off-by: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Tested-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: "Paul E . McKenney" <paulmck@xxxxxxxxxx>
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/dev-tools/kasan.rst | 3 +++
1 file changed, 3 insertions(+)
--- a/Documentation/dev-tools/kasan.rst~kasan-update-documentation-for-generic-kasan
+++ a/Documentation/dev-tools/kasan.rst
@@ -190,6 +190,9 @@ function calls GCC directly inserts the
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
~~~~~~~~~~~~~~~~~~~~~~~~
_
Patches currently in -mm which might be from walter-zh.wu@xxxxxxxxxxxx are
rcu-kasan-record-and-print-call_rcu-call-stack.patch
kasan-record-and-print-the-free-track.patch
kasan-add-tests-for-call_rcu-stack-recording.patch
kasan-update-documentation-for-generic-kasan.patch
