From: Walter Wu <walter-zh.wu@xxxxxxxxxxxx> Subject: 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@xxxxxxxxxxxx Signed-off-by: Walter Wu <walter-zh.wu@xxxxxxxxxxxx> Suggested-by: Marco Elver <elver@xxxxxxxxxx> Acked-by: Marco Elver <elver@xxxxxxxxxx> Reviewed-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: Lai Jiangshan <jiangshanlai@xxxxxxxxx> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/dev-tools/kasan.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/Documentation/dev-tools/kasan.rst~kasan-update-documentation-for-generic-kasan +++ a/Documentation/dev-tools/kasan.rst @@ -190,8 +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. +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 ~~~~~~~~~~~~~~~~~~~~~~~~ _
