From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC764C433B4 for ; Fri, 30 Apr 2021 06:00:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9219D61490 for ; Fri, 30 Apr 2021 06:00:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230280AbhD3GBl (ORCPT ); Fri, 30 Apr 2021 02:01:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:54836 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230286AbhD3GBk (ORCPT ); Fri, 30 Apr 2021 02:01:40 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 61ECA61482; Fri, 30 Apr 2021 06:00:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1619762452; bh=rep6HKRUTv6IBwjMTY5aCj3DijjQGK/hcJFjtBBCuKU=; h=Date:From:To:Subject:In-Reply-To:From; b=pz990X1LOAs1sXa6uHMGXNflzvtkCRyMLvnGOsU+ItXdSNlTZZxv0pyX4GNxB14iy bfkgXBiInQaShpGzWVopcDlNAdFKvxLNRwIhtofsPlHogT7gPB5vU/M2VuDA1xo5A9 rzvelLMDAsu97mdTlgClRJd2sflYloxj6DHOpdKE= Date: Thu, 29 Apr 2021 23:00:52 -0700 From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@gmail.com, dvyukov@google.com, frederic@kernel.org, glider@google.com, linux-mm@kvack.org, matthias.bgg@gmail.com, mm-commits@vger.kernel.org, oleg@redhat.com, qiang.zhang@windriver.com, ryabinin.a.a@gmail.com, torvalds@linux-foundation.org, walter-zh.wu@mediatek.com Subject: [patch 149/178] irq_work: record irq_work_queue() call stack Message-ID: <20210430060052.keBnrf36M%akpm@linux-foundation.org> In-Reply-To: <20210429225251.02b6386d21b69255b4f6c163@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Zqiang Subject: irq_work: record irq_work_queue() call stack Add the irq_work_queue() call stack into the KASAN auxiliary stack in order to improve KASAN reports. this will let us know where the irq work be queued. Link: https://lkml.kernel.org/r/20210331063202.28770-1-qiang.zhang@windriver.com Signed-off-by: Zqiang Reviewed-by: Dmitry Vyukov Acked-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Matthias Brugger Cc: Oleg Nesterov Cc: Walter Wu Cc: Frederic Weisbecker Signed-off-by: Andrew Morton --- kernel/irq_work.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/kernel/irq_work.c~irq_work-record-irq_work_queue-call-stack +++ a/kernel/irq_work.c @@ -19,7 +19,7 @@ #include #include #include - +#include static DEFINE_PER_CPU(struct llist_head, raised_list); static DEFINE_PER_CPU(struct llist_head, lazy_list); @@ -70,6 +70,9 @@ bool irq_work_queue(struct irq_work *wor if (!irq_work_claim(work)) return false; + /*record irq_work call stack in order to print it in KASAN reports*/ + kasan_record_aux_stack(work); + /* Queue the entry and raise the IPI if needed. */ preempt_disable(); __irq_work_queue_local(work); @@ -98,6 +101,8 @@ bool irq_work_queue_on(struct irq_work * if (!irq_work_claim(work)) return false; + kasan_record_aux_stack(work); + preempt_disable(); if (cpu != smp_processor_id()) { /* Arch remote IPI send/receive backend aren't NMI safe */ _