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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 E42D0C3A5A5 for ; Tue, 3 Sep 2019 13:39:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BBCFC2339D for ; Tue, 3 Sep 2019 13:39:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567517957; bh=WX++lsiW5/n4fIM7J1U21PJ8GwhnB7VQJktttkSjvK8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=qPvBLDrLRsFcmsgTNrEKKlwmZqiAxCbvuX6vYhfcto74cso15QT/vhbK/QC11YY87 EUs0OlomyAMBQRUnKU6qsyd2NDdXp0Ha134YldAvPBKyn/mouqEnMxBDdL8ShI5xWA ErZpalJhWDcX4AJ1dl3RfSEAM31m5XmZPG/UF5nw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729015AbfICNjR (ORCPT ); Tue, 3 Sep 2019 09:39:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:37950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727005AbfICNjQ (ORCPT ); Tue, 3 Sep 2019 09:39:16 -0400 Received: from zzz.localdomain (h184-61-154-48.mdsnwi.dsl.dynamic.tds.net [184.61.154.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 851622339D; Tue, 3 Sep 2019 13:39:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567517953; bh=WX++lsiW5/n4fIM7J1U21PJ8GwhnB7VQJktttkSjvK8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hdJyn8Ctp+DxnTUsVAaOGnh0ern1YQvY+SnVrEVrcIeSu2DdSjP8e0F8uM+TEpejk QdKB45J1OxrhjmvZBjp99LHzNO+iXO/O9WJgUtdU6YEu7al170dFUvLtJK356bRKOJ GcnejJKzWUCosUW26X03lm1oAFjVeCvrQq18e1D8= Date: Tue, 3 Sep 2019 08:39:10 -0500 From: Eric Biggers To: Miklos Szeredi Cc: linux-fsdevel@vger.kernel.org, linux-aio , Benjamin LaHaise , syzkaller-bugs , stable , Christoph Hellwig Subject: Re: [PATCH] fuse: disable irqs for fuse_iqueue::waitq.lock Message-ID: <20190903133910.GA5144@zzz.localdomain> Mail-Followup-To: Miklos Szeredi , linux-fsdevel@vger.kernel.org, linux-aio , Benjamin LaHaise , syzkaller-bugs , stable , Christoph Hellwig References: <0000000000008d8eac05906691ac@google.com> <20190822233529.4176-1-ebiggers@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Tue, Sep 03, 2019 at 09:31:29AM +0200, Miklos Szeredi wrote: > On Fri, Aug 23, 2019 at 1:35 AM Eric Biggers wrote: > > > > From: Eric Biggers > > > > When IOCB_CMD_POLL is used on the FUSE device, aio_poll() disables IRQs > > and takes kioctx::ctx_lock, then fuse_iqueue::waitq.lock. > > Not in -linus. > > Which tree was this reproduced with? > > Thanks, > Miklos Linus's tree. Here's the full symbolized output on v5.3-rc7: ===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.3.0-rc7 #1 Not tainted ----------------------------------------------------- syz_fuse/150 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: 00000000c2701b26 (&fiq->waitq){+.+.}, at: spin_lock include/linux/spinlock.h:338 [inline] 00000000c2701b26 (&fiq->waitq){+.+.}, at: aio_poll fs/aio.c:1751 [inline] 00000000c2701b26 (&fiq->waitq){+.+.}, at: __io_submit_one.constprop.0+0x203/0x5b0 fs/aio.c:1825 and this task is already holding: 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:363 [inline] 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll fs/aio.c:1749 [inline] 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: __io_submit_one.constprop.0+0x1f4/0x5b0 fs/aio.c:1825 which would create a new lock dependency: (&(&ctx->ctx_lock)->rlock){..-.} -> (&fiq->waitq){+.+.} but this new dependency connects a SOFTIRQ-irq-safe lock: (&(&ctx->ctx_lock)->rlock){..-.} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x25/0x190 fs/aio.c:618 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x202/0x210 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x2ae/0x890 kernel/rcu/tree.c:2114 rcu_core+0x13a/0x370 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0xbe/0x400 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x8f/0xc0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x8e/0x210 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] default_idle+0x29/0x160 arch/x86/kernel/process.c:580 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x1e/0x30 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x1f0/0x220 kernel/sched/idle.c:263 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354 rest_init+0x18a/0x24d init/main.c:451 arch_call_rest_init+0x9/0xc start_kernel+0x530/0x54e init/main.c:785 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x6d/0x71 arch/x86/kernel/head64.c:453 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 to a SOFTIRQ-irq-unsafe lock: (&fiq->waitq){+.+.} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] flush_bg_queue+0x91/0xf0 fs/fuse/dev.c:415 fuse_request_queue_background+0xd1/0x140 fs/fuse/dev.c:676 fuse_request_send_background+0x27/0x60 fs/fuse/dev.c:687 fuse_send_init fs/fuse/inode.c:986 [inline] fuse_fill_super+0x656/0x681 fs/fuse/inode.c:1211 mount_nodev+0x42/0x90 fs/super.c:1329 fuse_mount+0x13/0x20 fs/fuse/inode.c:1236 legacy_get_tree+0x2c/0x50 fs/fs_context.c:661 vfs_get_tree+0x22/0xc0 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x7e3/0xa60 fs/namespace.c:3111 ksys_mount+0x7d/0xd0 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0x20/0x30 fs/namespace.c:3331 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&fiq->waitq); local_irq_disable(); lock(&(&ctx->ctx_lock)->rlock); lock(&fiq->waitq); lock(&(&ctx->ctx_lock)->rlock); *** DEADLOCK *** 1 lock held by syz_fuse/150: #0: 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: spin_lock_irq include/linux/spinlock.h:363 [inline] #0: 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: aio_poll fs/aio.c:1749 [inline] #0: 00000000f4c02e81 (&(&ctx->ctx_lock)->rlock){..-.}, at: __io_submit_one.constprop.0+0x1f4/0x5b0 fs/aio.c:1825 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&(&ctx->ctx_lock)->rlock){..-.} { IN-SOFTIRQ-W at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x25/0x190 fs/aio.c:618 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x202/0x210 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x2ae/0x890 kernel/rcu/tree.c:2114 rcu_core+0x13a/0x370 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0xbe/0x400 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x8f/0xc0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x8e/0x210 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] default_idle+0x29/0x160 arch/x86/kernel/process.c:580 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x1e/0x30 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x1f0/0x220 kernel/sched/idle.c:263 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354 rest_init+0x18a/0x24d init/main.c:451 arch_call_rest_init+0x9/0xc start_kernel+0x530/0x54e init/main.c:785 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x6d/0x71 arch/x86/kernel/head64.c:453 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 INITIAL USE at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] free_ioctx_users+0x25/0x190 fs/aio.c:618 percpu_ref_put_many include/linux/percpu-refcount.h:293 [inline] percpu_ref_put include/linux/percpu-refcount.h:309 [inline] percpu_ref_call_confirm_rcu lib/percpu-refcount.c:130 [inline] percpu_ref_switch_to_atomic_rcu+0x202/0x210 lib/percpu-refcount.c:165 __rcu_reclaim kernel/rcu/rcu.h:222 [inline] rcu_do_batch+0x2ae/0x890 kernel/rcu/tree.c:2114 rcu_core+0x13a/0x370 kernel/rcu/tree.c:2314 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323 __do_softirq+0xbe/0x400 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x8f/0xc0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x8e/0x210 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] default_idle+0x29/0x160 arch/x86/kernel/process.c:580 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x1e/0x30 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x1f0/0x220 kernel/sched/idle.c:263 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354 rest_init+0x18a/0x24d init/main.c:451 arch_call_rest_init+0x9/0xc start_kernel+0x530/0x54e init/main.c:785 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x6d/0x71 arch/x86/kernel/head64.c:453 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 } ... key at: [] __key.50377+0x0/0x10 ... acquired at: check_prev_add+0xa7/0x950 kernel/locking/lockdep.c:2409 check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain+0x483/0x870 kernel/locking/lockdep.c:2897 __lock_acquire+0x447/0x7d0 kernel/locking/lockdep.c:3880 lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1751 [inline] __io_submit_one.constprop.0+0x203/0x5b0 fs/aio.c:1825 io_submit_one+0x146/0x5b0 fs/aio.c:1862 __do_sys_io_submit fs/aio.c:1921 [inline] __se_sys_io_submit+0x8e/0x270 fs/aio.c:1891 __x64_sys_io_submit+0x15/0x20 fs/aio.c:1891 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (&fiq->waitq){+.+.} { HARDIRQ-ON-W at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] flush_bg_queue+0x91/0xf0 fs/fuse/dev.c:415 fuse_request_queue_background+0xd1/0x140 fs/fuse/dev.c:676 fuse_request_send_background+0x27/0x60 fs/fuse/dev.c:687 fuse_send_init fs/fuse/inode.c:986 [inline] fuse_fill_super+0x656/0x681 fs/fuse/inode.c:1211 mount_nodev+0x42/0x90 fs/super.c:1329 fuse_mount+0x13/0x20 fs/fuse/inode.c:1236 legacy_get_tree+0x2c/0x50 fs/fs_context.c:661 vfs_get_tree+0x22/0xc0 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x7e3/0xa60 fs/namespace.c:3111 ksys_mount+0x7d/0xd0 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0x20/0x30 fs/namespace.c:3331 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe SOFTIRQ-ON-W at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] flush_bg_queue+0x91/0xf0 fs/fuse/dev.c:415 fuse_request_queue_background+0xd1/0x140 fs/fuse/dev.c:676 fuse_request_send_background+0x27/0x60 fs/fuse/dev.c:687 fuse_send_init fs/fuse/inode.c:986 [inline] fuse_fill_super+0x656/0x681 fs/fuse/inode.c:1211 mount_nodev+0x42/0x90 fs/super.c:1329 fuse_mount+0x13/0x20 fs/fuse/inode.c:1236 legacy_get_tree+0x2c/0x50 fs/fs_context.c:661 vfs_get_tree+0x22/0xc0 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x7e3/0xa60 fs/namespace.c:3111 ksys_mount+0x7d/0xd0 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0x20/0x30 fs/namespace.c:3331 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe INITIAL USE at: lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] flush_bg_queue+0x91/0xf0 fs/fuse/dev.c:415 fuse_request_queue_background+0xd1/0x140 fs/fuse/dev.c:676 fuse_request_send_background+0x27/0x60 fs/fuse/dev.c:687 fuse_send_init fs/fuse/inode.c:986 [inline] fuse_fill_super+0x656/0x681 fs/fuse/inode.c:1211 mount_nodev+0x42/0x90 fs/super.c:1329 fuse_mount+0x13/0x20 fs/fuse/inode.c:1236 legacy_get_tree+0x2c/0x50 fs/fs_context.c:661 vfs_get_tree+0x22/0xc0 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x7e3/0xa60 fs/namespace.c:3111 ksys_mount+0x7d/0xd0 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0x20/0x30 fs/namespace.c:3331 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe } ... key at: [] __key.40870+0x0/0x10 ... acquired at: check_prev_add+0xa7/0x950 kernel/locking/lockdep.c:2409 check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain+0x483/0x870 kernel/locking/lockdep.c:2897 __lock_acquire+0x447/0x7d0 kernel/locking/lockdep.c:3880 lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1751 [inline] __io_submit_one.constprop.0+0x203/0x5b0 fs/aio.c:1825 io_submit_one+0x146/0x5b0 fs/aio.c:1862 __do_sys_io_submit fs/aio.c:1921 [inline] __se_sys_io_submit+0x8e/0x270 fs/aio.c:1891 __x64_sys_io_submit+0x15/0x20 fs/aio.c:1891 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe stack backtrace: CPU: 1 PID: 150 Comm: syz_fuse Not tainted 5.3.0-rc7 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-20181126_142135-anatol 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x70/0x9a lib/dump_stack.c:113 print_bad_irq_dependency.cold+0x380/0x3d8 kernel/locking/lockdep.c:2025 check_irq_usage+0x337/0x400 kernel/locking/lockdep.c:2223 check_prev_add+0xa7/0x950 kernel/locking/lockdep.c:2409 check_prevs_add kernel/locking/lockdep.c:2507 [inline] validate_chain+0x483/0x870 kernel/locking/lockdep.c:2897 __lock_acquire+0x447/0x7d0 kernel/locking/lockdep.c:3880 lock_acquire+0x99/0x180 kernel/locking/lockdep.c:4412 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2b/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] aio_poll fs/aio.c:1751 [inline] __io_submit_one.constprop.0+0x203/0x5b0 fs/aio.c:1825 io_submit_one+0x146/0x5b0 fs/aio.c:1862 __do_sys_io_submit fs/aio.c:1921 [inline] __se_sys_io_submit+0x8e/0x270 fs/aio.c:1891 __x64_sys_io_submit+0x15/0x20 fs/aio.c:1891 do_syscall_64+0x4a/0x1a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1bbde7ec6d Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f3 51 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffffa3a70e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007ffffa3a7140 RCX: 00007f1bbde7ec6d RDX: 00007ffffa3a70f8 RSI: 0000000000000001 RDI: 00007f1bbe27d000 RBP: 0000559337c29290 R08: 0000000000000000 R09: 00007f1bbe27d000 R10: 0000000000000029 R11: 0000000000000246 R12: 0000559337c29190 R13: 00007ffffa3a72b0 R14: 0000000000000000 R15: 0000000000000000