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=-3.7 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 A5936C2BBCA for ; Wed, 16 Dec 2020 02:45:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8371E23103 for ; Wed, 16 Dec 2020 02:45:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725857AbgLPCpu (ORCPT ); Tue, 15 Dec 2020 21:45:50 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:53718 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725804AbgLPCpu (ORCPT ); Tue, 15 Dec 2020 21:45:50 -0500 Received: by mail-il1-f200.google.com with SMTP id q2so18226674ilt.20 for ; Tue, 15 Dec 2020 18:45:34 -0800 (PST) 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:in-reply-to:message-id:subject :from:to; bh=rDUW7r87onx/RWl3unGJ4GmRrVMni5cJjxiJLLepcRI=; b=kXrXtjvE4HGl9TPgGoQvRPJCpy1M/p6SBfkkYULRniHevVLRMGSeBsF0UmFNLMFoyZ zHyDWXDRs6yEfZHUg5E3yCoQx0hFtz+PCNuRZRnjVrjyADHHT4QG8sbltPqOMYMv8eDT De76thLSLCndPcRzXc6VUtk9Hjg0xPdinhHLbP/qGU7XUdUYnYUFAc4rCIgZr7+K+Iwh p4aR4dux5g5peUi+GJ8E5HM3B/W9N272HcUTdjLKwqAFkJqTUR7spaxPagCZEXsiSNrK ewMAotm1rNmyTHFNbRgApicOIVp9th6JAWNgWqYdIFY5dSy6B86Q4EQZIAP/4OL0bZpF g9Kg== X-Gm-Message-State: AOAM5324Kn7duxm4HVVd0DToo/OrPeBoYgdALiVg0xL0IbyaRnUrIxQ+ gm2tQW62rE51mbD+lFCzMiCHgVlftcJc49vS4TladRAz1JRX X-Google-Smtp-Source: ABdhPJxRkIbvQahC67PlL1n+oMTqKog23TOdu43rxkB6n4ivsNsa9DqMa47EvkdhQW92i8e7RoA4zZNKG7dVAfJd4z/qtCMLBPkv MIME-Version: 1.0 X-Received: by 2002:a92:6f12:: with SMTP id k18mr1959322ilc.66.1608086709308; Tue, 15 Dec 2020 18:45:09 -0800 (PST) Date: Tue, 15 Dec 2020 18:45:09 -0800 In-Reply-To: <0000000000005b303e05b62d6674@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000013920205b68bdd58@google.com> Subject: Re: INFO: task can't die in corrupted (2) From: syzbot To: ast@kernel.org, christian.brauner@ubuntu.com, daniel@iogearbox.net, davem@davemloft.net, gnault@redhat.com, kuba@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@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 syzbot has found a reproducer for the following issue on: HEAD commit: 9317f948 Add linux-next specific files for 20201215 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=151add97500000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c81cc44aa25b5b3 dashboard link: https://syzkaller.appspot.com/bug?extid=61cb1d04bf13f0c631b1 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=177df703500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1342f30f500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+61cb1d04bf13f0c631b1@syzkaller.appspotmail.com INFO: task syz-executor656:8498 can't die for more than 143 seconds. task:syz-executor656 state:R running task stack:27904 pid: 8498 ppid: 8493 flags:0x00004006 Call Trace: Showing all locks held in the system: 1 lock held by khungtaskd/1647: #0: ffffffff8b78f920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8185: #0: ffff88801ad9e0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:923 3 locks held by syz-executor656/8498: ============================================= Kernel panic - not syncing: hung_task: blocked tasks CPU: 0 PID: 1647 Comm: khungtaskd Not tainted 5.10.0-next-20201215-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+0x107/0x163 lib/dump_stack.c:120 panic+0x343/0x77f kernel/panic.c:231 check_hung_uninterruptible_tasks kernel/hung_task.c:257 [inline] watchdog.cold+0x157/0x31d kernel/hung_task.c:338 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Kernel Offset: disabled Rebooting in 86400 seconds..