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 95DF4C64ED6 for ; Wed, 1 Mar 2023 18:21:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229606AbjCASVO (ORCPT ); Wed, 1 Mar 2023 13:21:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58528 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229515AbjCASVN (ORCPT ); Wed, 1 Mar 2023 13:21:13 -0500 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2FAF39BA0 for ; Wed, 1 Mar 2023 10:21:11 -0800 (PST) Received: by mail-io1-f72.google.com with SMTP id v10-20020a056602058a00b007076e06ba3dso9209011iox.20 for ; Wed, 01 Mar 2023 10:21:11 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=inptAgL1BoezTf1J4ilWI9gcDQQE95Nqr7+5/AqqGpw=; b=fGhWHSlHCEosKo5BX1ng7OUG5ARiRIGCJKtAhXJnk7aGG89XocpwlMw/hb6GcE8tM7 lQafeC9tBF9YDSwiO2W9B1h8usdh4dCkEHHqP1SncodkoX8pj/Xai1vtrBEqMujg9w9H i5VkxZ2ybW+nZOsemN/NANn4YKYjJ8EXZ5Q+176p7ZetVEyLU6XFzUCJ8ruxifaQHY8f HP2IpsEW22IG8edGIELo+uD/ndyiJ2vc9IaTQ/p49OmFuhGlQ4hiYmuixNsPPjNc1tAG Td7mm6wNPhX8TGhXc/Eomz8n/HyMy46ahUN6Mp/d+DSj6V/XjmsJDpRBZbSRgX8yBPgr waTQ== X-Gm-Message-State: AO0yUKVjB7p/dM4q1O7AK4H+uaDlNoUlrG0OgQhMx/V+wRNB81RW9QIR KNDGUSI3iJiIqudNCfJ5hCVH7ZPS8FKlz3WsiOJ1SJ2yKsdq X-Google-Smtp-Source: AK7set/acmEvNgAzK6clGiGBlYe0dliFOGSBas4VYz8Vsn4Ogx9uO1rT2O4t8+MZNym2t1nYLET3J0chNmGYnujYKh56xE53DLRg MIME-Version: 1.0 X-Received: by 2002:a02:9641:0:b0:3c5:1915:7d5 with SMTP id c59-20020a029641000000b003c5191507d5mr3440590jai.5.1677694871211; Wed, 01 Mar 2023 10:21:11 -0800 (PST) Date: Wed, 01 Mar 2023 10:21:11 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d7144305f5dac6ef@google.com> Subject: [syzbot] [io-uring?] INFO: task hung in sys_io_uring_register (2) 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 found the following issue on: HEAD commit: 489fa31ea873 Merge branch 'work.misc' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=135829a8c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbfa7a73c540248d dashboard link: https://syzkaller.appspot.com/bug?extid=eba3269b5fe4023dd5ad compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1632ceacc80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6bea5d39bf58/disk-489fa31e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/265538df6fa2/vmlinux-489fa31e.xz kernel image: https://storage.googleapis.com/syzbot-assets/8f0a643c86ea/bzImage-489fa31e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+eba3269b5fe4023dd5ad@syzkaller.appspotmail.com INFO: task syz-executor.1:5629 blocked for more than 143 seconds. Not tainted 6.2.0-syzkaller-10827-g489fa31ea873 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28664 pid:5629 ppid:5568 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5304 [inline] __schedule+0x17d8/0x4990 kernel/sched/core.c:6622 schedule+0xc3/0x180 kernel/sched/core.c:6698 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 __do_sys_io_uring_register io_uring/io_uring.c:4342 [inline] __se_sys_io_uring_register+0x1e5/0x15b0 io_uring/io_uring.c:4303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f898ee8c0f9 RSP: 002b:00007f898fb4c168 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007f898efac050 RCX: 00007f898ee8c0f9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000003 RBP: 00007f898eee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8ddae53f R14: 00007f898fb4c300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:1/11: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d127cf0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d1284f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510 2 locks held by kworker/1:1/26: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0 #1: ffffc90000a1fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365 1 lock held by khungtaskd/28: #0: ffffffff8d127b20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 4 locks held by kworker/u4:3/46: #0: ffff888016612938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0 #1: ffffc90000b77d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365 #2: ffffffff8e28a2d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb80 net/core/net_namespace.c:575 #3: ffffffff8e296848 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:172 [inline] #3: ffffffff8e296848 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x30/0x100 net/sched/act_gate.c:658 3 locks held by kworker/1:2/1661: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77f/0x13a0 #1: ffffc90005f7fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7c6/0x13a0 kernel/workqueue.c:2365 #2: ffffffff8e296848 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:277 3 locks held by kworker/u4:6/3146: 2 locks held by getty/4751: #0: ffff88802c5c2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.0/5388: 1 lock held by syz-executor.3/5405: 1 lock held by syz-executor.2/5484: 1 lock held by syz-executor.1/5486: 1 lock held by syz-executor.5/5496: 1 lock held by syz-executor.3/5555: 1 lock held by syz-executor.4/5584: 1 lock held by syz-executor.0/5594: 1 lock held by syz-executor.1/5628: 1 lock held by syz-executor.1/5629: #0: ffff88807fa300a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register io_uring/io_uring.c:4342 [inline] #0: ffff88807fa300a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __se_sys_io_uring_register+0x1e5/0x15b0 io_uring/io_uring.c:4303 1 lock held by syz-executor.2/5631: 1 lock held by syz-executor.5/5657: 1 lock held by syz-executor.5/5658: #0: ffff8880295ba0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __do_sys_io_uring_register io_uring/io_uring.c:4342 [inline] #0: ffff8880295ba0a8 (&ctx->uring_lock){+.+.}-{3:3}, at: __se_sys_io_uring_register+0x1e5/0x15b0 io_uring/io_uring.c:4303 1 lock held by syz-executor.3/5665: 1 lock held by syz-executor.0/5811: 2 locks held by syz-executor.5/5826: #0: ffffffff8e296848 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:75 [inline] #0: ffffffff8e296848 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7ce/0xf40 net/core/rtnetlink.c:6171 #1: ffffffff8d12d1f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffffffff8d12d1f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:989 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller-10827-g489fa31ea873 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x4e5/0x560 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1b4/0x410 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0x1024/0x1070 kernel/hung_task.c:379 kthread+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5665 Comm: syz-executor.3 Not tainted 6.2.0-syzkaller-10827-g489fa31ea873 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RIP: 0010:io_prep_async_work+0x3/0x6b0 io_uring/io_uring.c:409 Code: e1 80 e1 07 80 c1 03 38 c1 0f 8c 1c ff ff ff 4c 89 e7 e8 10 c5 ad fd e9 0f ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 30 49 89 fd 49 bc 00 00 00 00 00 fc RSP: 0018:ffffc900056e7b90 EFLAGS: 00000293 RAX: ffffffff84344cf5 RBX: ffff88805e00f8c0 RCX: ffff888021219d40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88805e00f8c0 RBP: 0000000000000000 R08: ffffffff843565e4 R09: ffffffff8434c403 R10: 0000000000000003 R11: ffff888021219d40 R12: dffffc0000000000 R13: 1ffff1100b376234 R14: ffff888059bb1140 R15: ffff888059bb11a0 FS: 00007fc2b7aab700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005636566335c0 CR3: 00000000671e3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_prep_async_link io_uring/io_uring.c:449 [inline] io_queue_iowq+0x14b/0x6d0 io_uring/io_uring.c:462 handle_tw_list io_uring/io_uring.c:1184 [inline] tctx_task_work+0x3d8/0xdc0 io_uring/io_uring.c:1246 task_work_run+0x24a/0x300 kernel/task_work.c:179 ptrace_notify+0x2cd/0x380 kernel/signal.c:2354 ptrace_report_syscall include/linux/ptrace.h:411 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:473 [inline] syscall_exit_work kernel/entry/common.c:251 [inline] syscall_exit_to_user_mode_prepare kernel/entry/common.c:278 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x17a/0x2e0 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc2b6c8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc2b7aab168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 00000000000040b3 RBX: 00007fc2b6dabf80 RCX: 00007fc2b6c8c0f9 RDX: 0000000000000000 RSI: 00000000000040b3 RDI: 0000000000000003 RBP: 00007fc2b6ce7ae9 R08: 0000000020000000 R09: 0000000000000008 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8e021b7f R14: 00007fc2b7aab300 R15: 0000000000022000 --- This report is generated by a bot. 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