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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 285DAC54EBD for ; Thu, 12 Jan 2023 11:05:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231575AbjALLFY (ORCPT ); Thu, 12 Jan 2023 06:05:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231656AbjALLFE (ORCPT ); Thu, 12 Jan 2023 06:05:04 -0500 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE0403AA for ; Thu, 12 Jan 2023 02:56:18 -0800 (PST) Received: by mail-io1-f69.google.com with SMTP id z9-20020a6be009000000b006e0577c3686so10876345iog.0 for ; Thu, 12 Jan 2023 02:56:18 -0800 (PST) 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x13-20020a92d64d000000b0030ed14d9204mr123257ilp.128.1673520977888; Thu, 12 Jan 2023 02:56:17 -0800 (PST) Date: Thu, 12 Jan 2023 02:56:17 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000694ccd05f20ef7be@google.com> Subject: Re: [syzbot] WARNING in io_cqring_event_overflow From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in io_cqring_event_overflow ------------[ cut here ]------------ WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 1 PID: 2836 Comm: kworker/u4:4 Not tainted 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000c655e578 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000d1727000 x18: 00000000000000c0 x17: ffff80000df48158 x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 576210 hardirqs last enabled at (576209): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (576209): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (576210): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (576168): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (576168): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (576166): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (576166): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000c3a36f78 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c70e9000 x18: 0000000000000232 x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 587416 hardirqs last enabled at (587415): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (587415): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (587416): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (587360): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (587360): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (587358): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (587358): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000cc27dc78 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c60f2000 x18: 0000000000000364 x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 588956 hardirqs last enabled at (588955): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (588955): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (588956): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (587754): [] sock_orphan include/net/sock.h:2098 [inline] softirqs last enabled at (587754): [] unix_release_sock+0x15c/0x544 net/unix/af_unix.c:604 softirqs last disabled at (587752): [] sock_orphan include/net/sock.h:2094 [inline] softirqs last disabled at (587752): [] unix_release_sock+0x140/0x544 net/unix/af_unix.c:604 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000cc1fb478 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c7bf0000 x18: 0000000000000191 x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 598112 hardirqs last enabled at (598111): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (598111): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (598112): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (597426): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (597426): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (597424): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (597424): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000c39dbe78 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c82e1000 x18: 000000000000032e x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 600672 hardirqs last enabled at (600671): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (600671): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (600672): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (600626): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (600626): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (600624): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (600624): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 0 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000cc27d878 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000d1727000 x18: 0000000000000315 x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 603390 hardirqs last enabled at (603389): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (603389): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (603390): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (603380): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (603380): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (603378): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (603378): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000c63c7478 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c9364000 x18: 0000000000000150 x17: ffff8001f1b6b000 x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 613556 hardirqs last enabled at (613555): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (613555): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (613556): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (613530): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (613530): [] ieee80211_ibss_work+0x184/0x9f0 net/mac80211/ibss.c:1701 softirqs last disabled at (613528): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (613528): [] ieee80211_ibss_work+0x68/0x9f0 net/mac80211/ibss.c:1690 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000cc1fb378 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c70e9000 x18: 000000000000028f x17: 0000000000000075 x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 621634 hardirqs last enabled at (621633): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (621633): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (621634): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (621566): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (621566): [] batadv_nc_purge_paths+0x1d0/0x214 net/batman-adv/network-coding.c:471 softirqs last disabled at (621564): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (621564): [] batadv_nc_purge_paths+0x60/0x214 net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 2836 at io_uring/io_uring.c:734 io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 Modules linked in: CPU: 1 PID: 2836 Comm: kworker/u4:4 Tainted: G W 6.2.0-rc3-syzkaller-00011-g0af4af977a59 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: events_unbound io_ring_exit_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 lr : io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 sp : ffff8000164abad0 x29: ffff8000164abad0 x28: ffff0000c4c59b78 x27: ffff80000d49b000 x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: ffff0000c70eb000 x18: 000000000000036d x17: ffff80000c15d8bc x16: ffff80000dd86118 x15: ffff0000c60dce00 x14: 0000000000000110 x13: 00000000ffffffff x12: ffff0000c60dce00 x11: ff808000095945e8 x10: 0000000000000000 x9 : ffff8000095945e8 x8 : ffff0000c60dce00 x7 : ffff80000c1090e0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: io_cqring_event_overflow+0x1c0/0x230 io_uring/io_uring.c:734 io_req_cqe_overflow+0x5c/0x70 io_uring/io_uring.c:773 io_fill_cqe_req io_uring/io_uring.h:168 [inline] io_do_iopoll+0x474/0x62c io_uring/rw.c:1065 io_iopoll_try_reap_events+0x6c/0x108 io_uring/io_uring.c:1513 io_uring_try_cancel_requests+0x13c/0x258 io_uring/io_uring.c:3056 io_ring_exit_work+0xec/0x390 io_uring/io_uring.c:2869 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:863 irq event stamp: 623186 hardirqs last enabled at (623185): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (623185): [] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 hardirqs last disabled at (623186): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (623164): [] spin_unlock_bh include/linux/spinlock.h:395 [inline] softirqs last enabled at (623164): [] ieee80211_ibss_work+0x184/0x9f0 net/mac80211/ibss.c:1701 softirqs last disabled at (623162): [] spin_lock_bh include/linux/spinlock.h:355 [inline] softirqs last disabled at (623162): [] ieee80211_ibss_work+0x68/0x9f0 net/mac80211/ibss.c:1690 ---[ end trace 0000000000000000 ]--- Tested on: commit: 0af4af97 io_uring/poll: add hash if ready poll request.. git tree: git://git.kernel.dk/linux.git syztest console output: https://syzkaller.appspot.com/x/log.txt?x=1415a902480000 kernel config: https://syzkaller.appspot.com/x/.config?x=965a23481ff8fa50 dashboard link: https://syzkaller.appspot.com/bug?extid=6805087452d72929404e compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 Note: no patches were applied.