On 3/15/21 8:44 PM, Walter Wu wrote: > Why record task_work_add() call stack? > Syzbot reports many use-after-free issues for task_work, see [1]. > After see the free stack and the current auxiliary stack, we think > they are useless, we don't know where register the work, this work > may be the free call stack, so that we miss the root cause and > don't solve the use-after-free. > > Add task_work_add() call stack into KASAN auxiliary stack in > order to improve KASAN report. It is useful for programmers > to solve use-after-free issues. I think this is a very useful addition, especially as task_work proliferates. Reviewed-by: Jens Axboe <axboe@xxxxxxxxx> -- Jens Axboe
