From nobody Fri Jun 19 14:43:28 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B006C433F5 for ; Sat, 2 Apr 2022 14:25:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356266AbiDBO1W (ORCPT ); Sat, 2 Apr 2022 10:27:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356255AbiDBO1T (ORCPT ); Sat, 2 Apr 2022 10:27:19 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F9591B7AE for ; Sat, 2 Apr 2022 07:25:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648909528; x=1680445528; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=R6M6OmbRe4RMZI555C8KBCJG/enQgm/jqTKIB6tEdlU=; b=LO0nKSIfMA7PkutT3TXnpO1IM74hoxqiCL+Lna1ofz7VBvzmFOzIfZTs cUivUkhK6jk9yQ4WfSw25doR7h/FBzq44dxYjEgwUTCZ5yqwLaJ7VghlL SEy5epdpqaIyo0n7NYQXTUEjnuQwuN79MaJl1NE69u9KGtERgQhoXS8y3 2r4UBaUUAi4Et1KiJxp8NhBs9ZbO3bCikZoQDFa2i4B87DCUVhQRg8GMv kygik1LPrc164BrWV6cKTrjljIiHQmpen9rC6PUxg15hptbyl4p4fSYs1 5pf8yZJreIfTWfld5Xv4PRpw72fYxpSTMpT9IgR0rt/70I4aBxW8xsCR0 g==; X-IronPort-AV: E=McAfee;i="6200,9189,10305"; a="240242657" X-IronPort-AV: E=Sophos;i="5.90,230,1643702400"; d="scan'208";a="240242657" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Apr 2022 07:25:27 -0700 X-IronPort-AV: E=Sophos;i="5.90,230,1643702400"; d="scan'208";a="548145044" Received: from zq-optiplex-7090.bj.intel.com ([10.238.156.125]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Apr 2022 07:25:25 -0700 From: Zqiang To: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH] irq_work: Use kasan_record_aux_stack_noalloc() record callstack Date: Sat, 2 Apr 2022 22:25:55 +0800 Message-Id: <20220402142555.2699582-1-qiang1.zhang@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" [ 4.113128] BUG: sleeping function called from invalid context at kernel= /locking/spinlock_rt.c:46 [ 4.113132] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 239, = name: bootlogd [ 4.113149] Preemption disabled at: [ 4.113149] [] rt_mutex_slowunlock+0xa1/0x4e0 [ 4.113154] CPU: 3 PID: 239 Comm: bootlogd Tainted: G W 5.17.1-rt17-yocto-preempt-rt+ #105 [ 4.113157] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014 [ 4.113159] Call Trace: [ 4.113160] [ 4.113161] dump_stack_lvl+0x60/0x8c [ 4.113165] dump_stack+0x10/0x12 [ 4.113167] __might_resched.cold+0x13b/0x173 [ 4.113172] rt_spin_lock+0x5b/0xf0 [ 4.113179] get_page_from_freelist+0x20c/0x1610 [ 4.113208] __alloc_pages+0x25e/0x5e0 [ 4.113222] __stack_depot_save+0x3c0/0x4a0 [ 4.113228] kasan_save_stack+0x3a/0x50 [ 4.113322] __kasan_record_aux_stack+0xb6/0xc0 [ 4.113326] kasan_record_aux_stack+0xe/0x10 [ 4.113329] irq_work_queue_on+0x6a/0x1c0 [ 4.113333] pull_rt_task+0x631/0x6b0 [ 4.113343] do_balance_callbacks+0x56/0x80 [ 4.113346] __balance_callbacks+0x63/0x90 [ 4.113350] rt_mutex_setprio+0x349/0x880 [ 4.113366] rt_mutex_slowunlock+0x22a/0x4e0 [ 4.113377] rt_spin_unlock+0x49/0x80 [ 4.113380] uart_write+0x186/0x2b0 [ 4.113385] do_output_char+0x2e9/0x3a0 [ 4.113389] n_tty_write+0x306/0x800 [ 4.113413] file_tty_write.isra.0+0x2af/0x450 [ 4.113422] tty_write+0x22/0x30 [ 4.113425] new_sync_write+0x27c/0x3a0 [ 4.113446] vfs_write+0x3f7/0x5d0 [ 4.113451] ksys_write+0xd9/0x180 [ 4.113463] __x64_sys_write+0x43/0x50 [ 4.113466] do_syscall_64+0x44/0x90 [ 4.113469] entry_SYSCALL_64_after_hwframe+0x44/0xae On PREEMPT_RT kernel and KASAN is enabled. the kasan_record_aux_stack() may call alloc_pages(), and the rt-spinlock will be acquired, if currently in atomic context, will trigger warning. fix it by use kasan_record_aux_stack_noalloc() to avoid call alloc_pages(). Signed-off-by: Zqiang --- kernel/irq_work.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/irq_work.c b/kernel/irq_work.c index f7df715ec28e..7afa40fe5cc4 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -137,7 +137,7 @@ bool irq_work_queue_on(struct irq_work *work, int cpu) if (!irq_work_claim(work)) return false; =20 - kasan_record_aux_stack(work); + kasan_record_aux_stack_noalloc(work); =20 preempt_disable(); if (cpu !=3D smp_processor_id()) { --=20 2.25.1