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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 22880C4332D for ; Fri, 20 Mar 2020 17:36:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 023B420722 for ; Fri, 20 Mar 2020 17:36:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727046AbgCTRgP (ORCPT ); Fri, 20 Mar 2020 13:36:15 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:52912 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726801AbgCTRgP (ORCPT ); Fri, 20 Mar 2020 13:36:15 -0400 Received: by mail-io1-f72.google.com with SMTP id e21so5196691ios.19 for ; Fri, 20 Mar 2020 10:36:13 -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=f6YMHfjGnTP/8tpRuBlv/1UcczrHhE1lvW3GQCZN6jo=; b=a8gkH+swzDFZkIhgKzDr80gWmXWN60EkLZvpC7qcgfPi78py54NnsVZbITiuuNOgXs hH62EIkhZNFs6wye+CEgGzTNG/7vkBgbThw0/ZcNYmu63/IGuuiKkOWJf1OvQoFPR4Yt 6EXHyi7WmFIIoU3WNPgNdBnrODEM5W1CaI0lr+Z7akLuiYrTNUScFaSWGHb/DyMMhb9b 6eMRpfp1rxaf1txFcOktHBzWuNeMonh2WbPuO+rzwXfxSqTSjpiW+VWeFcGX7PY/5ZzF V4M/j7EBWY6hI33pP/VcUTMCx1146fv0PONuTh2XcAdpn6vqMiWZNcFS//XJD1jKuGJj AFnw== X-Gm-Message-State: ANhLgQ0o/tezVWgRyo8PBxcY7DhWdI4wxfxrrM9UmKDGXp6PHZ3qvyw4 KYPeApMDL1cSplQX7o1hjchMy0avvBsnwviyVc1+Nj9/Kyka X-Google-Smtp-Source: ADFU+vuWnrKmg+t9ZBYrg60qhMerqd32AYFr+T07WRSMw35JqJhGd5CPwXr27RVuXtxbj83tAYf8K+0/wMtfoFvjkF6+J2OnDyJw MIME-Version: 1.0 X-Received: by 2002:a92:2911:: with SMTP id l17mr9927998ilg.166.1584725772967; Fri, 20 Mar 2020 10:36:12 -0700 (PDT) Date: Fri, 20 Mar 2020 10:36:12 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c3a75205a14cb8c9@google.com> Subject: WARNING in ib_uverbs_remove_one From: syzbot To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 5076190d mm: slub: be more careful about the double cmpxch.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1601ab55e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=9f894bd92023de02 dashboard link: https://syzkaller.appspot.com/bug?extid=d3f37b9458fe8281d078 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+d3f37b9458fe8281d078@syzkaller.appspotmail.com ------------[ cut here ]------------ sysfs group 'power' not found for kobject 'uverbs0' WARNING: CPU: 0 PID: 73 at fs/sysfs/group.c:278 sysfs_remove_group fs/sysfs/group.c:278 [inline] WARNING: CPU: 0 PID: 73 at fs/sysfs/group.c:278 sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 73 Comm: kworker/u4:3 Not tainted 5.6.0-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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:sysfs_remove_group fs/sysfs/group.c:278 [inline] RIP: 0010:sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269 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 41 48 8b 33 48 c7 c7 60 a8 19 88 e8 c3 0d 61 ff <0f> 0b eb 95 e8 92 ba cb ff e9 d2 fe ff ff 48 89 df e8 85 ba cb ff RSP: 0018:ffffc90001057ad0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff887145e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200020af4c RBP: 0000000000000000 R08: ffff8880a9330580 R09: ffffed1015cc6659 R10: ffffed1015cc6658 R11: ffff8880ae6332c7 R12: ffff8880905fc058 R13: ffffffff88714b80 R14: ffff88804d598558 R15: ffffffff8a1df3e0 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:741 device_del+0x18b/0xd30 drivers/base/core.c:2654 cdev_device_del+0x15/0x80 fs/char_dev.c:570 ib_uverbs_remove_one drivers/infiniband/core/uverbs_main.c:1207 [inline] ib_uverbs_remove_one+0x3f/0x540 drivers/infiniband/core/uverbs_main.c:1199 remove_client_context+0xbe/0x110 drivers/infiniband/core/device.c:724 disable_device+0x13b/0x230 drivers/infiniband/core/device.c:1268 __ib_unregister_device+0x91/0x180 drivers/infiniband/core/device.c:1435 ib_unregister_work+0x15/0x30 drivers/infiniband/core/device.c:1545 process_one_work+0x94b/0x1690 kernel/workqueue.c:2266 worker_thread+0x96/0xe20 kernel/workqueue.c:2412 kthread+0x357/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. 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