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 660DCC4727D for ; Mon, 5 Oct 2020 08:48:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 330232078D for ; Mon, 5 Oct 2020 08:48:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725987AbgJEIs3 (ORCPT ); Mon, 5 Oct 2020 04:48:29 -0400 Received: from mail-io1-f78.google.com ([209.85.166.78]:42077 "EHLO mail-io1-f78.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725909AbgJEIs0 (ORCPT ); Mon, 5 Oct 2020 04:48:26 -0400 Received: by mail-io1-f78.google.com with SMTP id w3so4330221iou.9 for ; Mon, 05 Oct 2020 01:48:25 -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=G6GsEG0RkZVPyjNqFfG3gKAiPzYx/YvR1ErOT0J12wk=; b=P44PLIaz2EmHfhcazwPVfQa+NLupQsdNyrY49aIbA4exFI+TK/h+xa+sck5WRqUszL 3WhGryikQsI03dKWt7QKpUbyg9KJMWb3cVDWW4ZZnlUyBR6qcYVbXuZ97YqxqvIi4Xzo e0m1GWrIrNzzrhEHPOmCQQHz5olNi1mN5l+y68bkoyB8L/gkrn307bplynnchqVl0m0F kqpdhuf9V0lORF0pgl5C1wPKE/EsFBMO3ldjezmEM1NShmBw87lc/grGi1Dlj6ebtIEn Bd+WEBViPlh4S9yIEdaBpUNRgUpW60DSStIUzIQJDX0JL6t5VDzz6wzCHABRGHrOsevl P6KQ== X-Gm-Message-State: AOAM532oc5jK4og4d+4Hcf7P9ty4edKFbQytwCKvXy1kMLHTa0May/ef ikAGVLJja3PH+ppZjZraPxHWUnBiyxzoedxwaDUGnL488rLx X-Google-Smtp-Source: ABdhPJxw2ZHnZrRMBSuA1WY+gur9HBw2dHlqtd6vUguLvgBjUDr/uw/WblqcEjpQDK1G6HYqIVz6onKMWuISYP6z3YVBcHt47jO4 MIME-Version: 1.0 X-Received: by 2002:a05:6e02:130e:: with SMTP id g14mr5716639ilr.205.1601887705328; Mon, 05 Oct 2020 01:48:25 -0700 (PDT) Date: Mon, 05 Oct 2020 01:48:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a5738205b0e88b7d@google.com> Subject: WARNING in __ib_unregister_device From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: f5083d0c drivers/net/wan/hdlc_fr: Improvements to the code.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=11546beb900000 kernel config: https://syzkaller.appspot.com/x/.config?x=1e6c5266df853ae dashboard link: https://syzkaller.appspot.com/bug?extid=8f167a5e27d042b88f5e 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+8f167a5e27d042b88f5e@syzkaller.appspotmail.com smc: removing ib device syz1 ------------[ cut here ]------------ sysfs group 'power' not found for kobject 'syz1' WARNING: CPU: 1 PID: 30473 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 30473 Comm: kworker/u4:0 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound ib_unregister_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x382/0x7fb kernel/panic.c:231 __warn.cold+0x20/0x4b kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279 Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 37 48 8b 33 48 c7 c7 c0 31 9b 88 e8 8c ae 58 ff <0f> 0b eb 98 e8 a1 69 ca ff e9 01 ff ff ff 48 89 df e8 94 69 ca ff RSP: 0018:ffffc9001599fbd8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffffff88fa00e0 RCX: 0000000000000000 RDX: ffff888065092380 RSI: ffffffff815f7935 RDI: fffff52002b33f6d RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8880ae531927 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880666c46d8 R13: ffffffff88fa0680 R14: ffff8880a6adb100 R15: ffff8880aa071800 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:801 device_del+0x18b/0xd90 drivers/base/core.c:3080 __ib_unregister_device+0xb5/0x1a0 drivers/infiniband/core/device.c:1464 ib_unregister_work+0x15/0x30 drivers/infiniband/core/device.c:1569 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.