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=-4.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 03942C4727F for ; Wed, 30 Sep 2020 22:29:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD66820719 for ; Wed, 30 Sep 2020 22:29:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731615AbgI3W30 (ORCPT ); Wed, 30 Sep 2020 18:29:26 -0400 Received: from mail-il1-f205.google.com ([209.85.166.205]:49320 "EHLO mail-il1-f205.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731598AbgI3W3X (ORCPT ); Wed, 30 Sep 2020 18:29:23 -0400 Received: by mail-il1-f205.google.com with SMTP id o18so2798226ilm.16 for ; Wed, 30 Sep 2020 15:29:21 -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=+0VlvcNRUBLPwYY+/l3iWps8TddUUFMalUbSMxo1nMc=; b=JoGslo6sQxvI60ezTW7/3KtHZggrNo3x9SGHts2w4ctLzw2zEgEv3QA3ccRLG64qv2 JVSkg7s0Nl3K8KjZRO87W/HqL+Fu4XAN2THzK+QaChGuwBddNRrvInJbFLT/y4QZw5vB zeCFiO6AJsTSrjMjPcWhO7Ymdf3rZmCYfkopwozCIACH9L4lMx1nPh+Bq9Rkkx716dQl r87cT/iGYhd+I2ayEWdT67R6G/OqZR9jhvpRo+j5DfOJP0In4mi6iJ7i/xQq0iCGMAnI VURfVR5rkk7goH48O/DYEffAi4uCqy/1iEFAJYxT8SynuwaXInKCtjLXnQ+UJo+C3FzY ViGg== X-Gm-Message-State: AOAM531rWJxMf1Nt0cj8C1pugHmkl5RfJpsb1obwK9XriHvr8yMQUZjx 4vzcikL8kSrj6l4oa0FEFF5tsTF5OnY4J2D6pgCyZBPVbN3S X-Google-Smtp-Source: ABdhPJxQ53hwefKNF6WE9W0GG8xHlmhPERFSu7t/v13Oo8rcSYfID9pDQh/morvR5iOb+/sczzfKsSw84sYfzhDoi8jBLmnKOSv5 MIME-Version: 1.0 X-Received: by 2002:a92:de4b:: with SMTP id e11mr89152ilr.101.1601504961330; Wed, 30 Sep 2020 15:29:21 -0700 (PDT) Date: Wed, 30 Sep 2020 15:29:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000053864e05b08f6e58@google.com> Subject: WARNING in kthread_park From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: d1d2220c Add linux-next specific files for 20200924 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15b1918d900000 kernel config: https://syzkaller.appspot.com/x/.config?x=254e028a642027c dashboard link: https://syzkaller.appspot.com/bug?extid=e7eea402700c6db193be compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e7eea402700c6db193be@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 28162 at kernel/kthread.c:547 kthread_park+0x17c/0x1b0 kernel/kthread.c:547 Modules linked in: CPU: 1 PID: 28162 Comm: syz-executor.3 Not tainted 5.9.0-rc6-next-20200924-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kthread_park+0x17c/0x1b0 kernel/kthread.c:547 Code: 2a 04 27 00 0f 0b e9 fb fe ff ff e8 1e 04 27 00 0f 0b e8 17 04 27 00 41 bc da ff ff ff 5b 44 89 e0 5d 41 5c c3 e8 04 04 27 00 <0f> 0b 41 bc f0 ff ff ff eb be e8 f5 03 27 00 0f 0b eb b2 e8 bc 74 RSP: 0018:ffffc90017ebfd50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888092c0ca00 RCX: ffffffff814e2ccf RDX: ffff88804f30a040 RSI: ffffffff814e2d6c RDI: 0000000000000007 RBP: ffff88804f46c440 R08: 0000000000000000 R09: ffff888092c0ca07 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffff888096f7d000 R15: 0000000000000000 FS: 0000000002a7e940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001590004 CR3: 000000020a32f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: io_sq_thread_park fs/io_uring.c:7145 [inline] io_sq_thread_park fs/io_uring.c:7139 [inline] io_uring_flush+0x10a6/0x1640 fs/io_uring.c:8596 filp_close+0xb4/0x170 fs/open.c:1276 __close_fd+0x2f/0x50 fs/file.c:671 __do_sys_close fs/open.c:1295 [inline] __se_sys_close fs/open.c:1293 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1293 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x417901 Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fffe4c281e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000417901 RDX: 0000000000000000 RSI: ffffffff8840e309 RDI: 0000000000000003 RBP: 0000000000000001 R08: ffffffff8134e496 R09: 0000000092f8bb6d R10: 00007fffe4c282d0 R11: 0000000000000293 R12: 000000000118d9c0 R13: 000000000118d9c0 R14: ffffffffffffffff R15: 000000000118cf4c --- 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.