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authorWalter Wu <walter-zh.wu@mediatek.com>2020-12-14 19:09:21 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 12:13:42 -0800
commit4784be284adaa516df4144fc919f9bde8200443a (patch)
tree9944cf02aecff5ee3ca2d9b8305b5b62e1498d57 /Documentation
parent214c783d593bdb83cc7e3bd9df9c6fe206d82e1c (diff)
kasan: update documentation for generic kasan
Generic KASAN also supports to record the last two workqueue stacks and print them in KASAN report. So that need to update documentation. Link: https://lkml.kernel.org/r/20201203023037.30792-1-walter-zh.wu@mediatek.com 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> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/dev-tools/kasan.rst5
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst
index 2b68addaadcd..f0b2d65e4b8a 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() and workqueue queuing.
Software tag-based KASAN
~~~~~~~~~~~~~~~~~~~~~~~~