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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 3CE5EC07E9C for ; Sun, 11 Jul 2021 12:24:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2DCF61222 for ; Sun, 11 Jul 2021 12:24:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229688AbhGKM1E (ORCPT ); Sun, 11 Jul 2021 08:27:04 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:42894 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232822AbhGKM1E (ORCPT ); Sun, 11 Jul 2021 08:27:04 -0400 Received: by mail-il1-f200.google.com with SMTP id d17-20020a9236110000b02901cf25fcfdcdso9856461ila.9 for ; Sun, 11 Jul 2021 05:24:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=CLbGI7UkfbxLcnvn5/PVcxj3iqrwRfUbR/u6hvGyPHw=; b=Z7VxUY0gWE5uNupGon9MGXxNzPbqOe/U6YXStp1iy9ykmP28elxCVufj8w0SGr4L7z UCK8VfbcXp1qvbsJXb3cSFSYXVCxPY5r/RbszkstrR9thGBSCgQTs2pekMjyCbrSJWj0 NUyc08wnm+V4PfF87fXHQh9P1HH7+eSUE+KMuWWtHGXUGAT937mNeb9mb2VjGARMWbSx COwo3OGIeUfOrTA/PlUcglaTLCOmyyiYQYzeTVylJLVkVws4b30XrcMoTXA2HxA3H+EW MfF8ATYHXWu+XGzPX7+QUbZHoZcEj6QxJdWwElpdogWiRoG08QuNA+yKHN8keaYE9aFb JE7A== X-Gm-Message-State: AOAM530x/4rUnvz7hKBl63RIkZe28ClKy2oZfwdf+U83RJxDIln8Mem+ o2Amic+DHZkMzx3DvI7FD3vUvrP1irw85poip4/3E50iYbKE X-Google-Smtp-Source: ABdhPJzrfCNPWGCQUPqweJmxs97VxuJWg+ZMI5qRCs0PQmwsKbFm7S4uojcjSkgxprgoaafagHn8KMEpOyrswojgMznGXL+9EPHH MIME-Version: 1.0 X-Received: by 2002:a02:380b:: with SMTP id b11mr4836839jaa.83.1626006256570; Sun, 11 Jul 2021 05:24:16 -0700 (PDT) Date: Sun, 11 Jul 2021 05:24:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000053572d05c6d81503@google.com> Subject: [syzbot] INFO: task hung in io_uring_cancel_generic 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: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14cd9efbd00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757 dashboard link: https://syzkaller.appspot.com/bug?extid=ba6fcd859210f4e9e109 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13bbf280300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1111ec9c300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ba6fcd859210f4e9e109@syzkaller.appspotmail.com INFO: task syz-executor015:8439 blocked for more than 143 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor015 state:D stack:28184 pid: 8439 ppid: 8438 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 io_uring_cancel_generic+0x54d/0x890 fs/io_uring.c:9203 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x28b/0x2a50 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x43eac9 RSP: 002b:00007ffc2d1b6378 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eac9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00000000f0ffffff R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b02f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1650 Comm: khungtaskd Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd4b/0xfb0 kernel/hung_task.c:294 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches