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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS autolearn=ham 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 74DA2C4360F for ; Thu, 21 Feb 2019 14:44:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B9822077B for ; Thu, 21 Feb 2019 14:44:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729832AbfBUOoE (ORCPT ); Thu, 21 Feb 2019 09:44:04 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:39389 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729826AbfBUOoE (ORCPT ); Thu, 21 Feb 2019 09:44:04 -0500 Received: by mail-io1-f70.google.com with SMTP id a9so1515326iol.6 for ; Thu, 21 Feb 2019 06:44:03 -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:message-id:subject:from:to; bh=Ka1LfNYrMGwk9ee+N1Vo76fA+wItesHIaTwt/Apjta8=; b=nYFkMgZhIpiXk8IAHH02kYHzXTKdE1jHXU4XHs9LvEPDCmYSt0POtl2Rd2AG4mNtUb 9RtyVRkIFfuc188TX2WLRYN429f7IaIqLxnpHv3FZln9yyFW7kad4BWRbPpRZU2mERBk 8Eg+VrOXEH15jsiZqp2op6Ib0ouNKrp8sUQNMEci+2WFhYeS2iT1m6ad7khXFTrl81Nj X5NXKUnB7SgJF/uFtNSfijnqHV+/mdiPGhXlkoqWvV75GHBLfdvGxORCJrpKpaQ6Lcjk 5/dYPBhjUgR9lYdZnRNmyTsvpD+f5q2k7SYsiNohPxGPCQnatsCvIH+04K7buxxgaMiu /ssg== X-Gm-Message-State: AHQUAuaxA+C9QYu4wY0x0orUar2ogoHXGRU99nQhNwZaG+PUP8iij0js Q2GfQtBMZNFAVUom/wiLWJ3qQwmlI37zCbRK/ptlLJys8ThY X-Google-Smtp-Source: AHgI3IZ9weZbif3KbgtO1QaBazEm+cxJ8sNajAAYfTbEVD3Jv3YTXhu1NKZGpJRk5wI15NkZLfPYP1ghUWkHvZ2jNzS3GjRBWswl MIME-Version: 1.0 X-Received: by 2002:a5d:914f:: with SMTP id y15mr12331802ioq.18.1550760243382; Thu, 21 Feb 2019 06:44:03 -0800 (PST) Date: Thu, 21 Feb 2019 06:44:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007056430582688164@google.com> Subject: WARNING in cleanup_mnt From: syzbot To: 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"; format=flowed; delsp=yes Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 48b161983ae5 Merge tag 'xarray-5.0-rc3' of git://git.infra.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10cc68ef400000 kernel config: https://syzkaller.appspot.com/x/.config?x=505743eba4e4f68 dashboard link: https://syzkaller.appspot.com/bug?extid=3f12aa66b747ba56fcae 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+3f12aa66b747ba56fcae@syzkaller.appspotmail.com Enabling of bearer rejected, already enabled WARNING: CPU: 0 PID: 17831 at fs/namespace.c:1091 cleanup_mnt+0x118/0x160 fs/namespace.c:1091 Kernel panic - not syncing: panic_on_warn set ... Enabling of bearer rejected, already enabled CPU: 0 PID: 17831 Comm: kworker/0:1 Not tainted 5.0.0-rc3+ #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events proc_cleanup_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 kobject: 'loop4' (00000000cd062423): kobject_uevent_env __warn.cold+0x20/0x48 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 kobject: 'loop4' (00000000cd062423): fill_kobj_path: path = '/devices/virtual/block/loop4' fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:cleanup_mnt+0x118/0x160 fs/namespace.c:1091 Code: 1c 01 00 00 48 c7 c7 c0 c9 a5 89 e8 12 4e 11 06 48 8d 7b 38 48 c7 c6 a0 0f db 81 e8 e2 77 91 ff 5b 41 5c 5d c3 e8 a8 dc a6 ff <0f> 0b e9 0e ff ff ff e8 9c dc a6 ff 48 89 df e8 94 fe 06 00 e9 31 RSP: 0018:ffff8880586b7888 EFLAGS: 00010293 RAX: ffff88809f4b4140 RBX: ffff8880909c3a00 RCX: ffffffff81db2334 RDX: 0000000000000000 RSI: ffffffff81db2428 RDI: 0000000000000005 RBP: ffff8880586b7898 R08: ffff88809f4b4140 R09: fffffbfff13024e6 R10: fffffbfff13024e5 R11: ffffffff8981272b R12: 00000000000000fc R13: 0000000000004000 R14: dffffc0000000000 R15: ffff8880909c3a30 mntput_no_expire fs/namespace.c:1175 [inline] mntput_no_expire+0x866/0xbd0 fs/namespace.c:1117 kobject: 'loop2' (00000000d5abe9f2): kobject_uevent_env kobject: 'loop2' (00000000d5abe9f2): fill_kobj_path: path = '/devices/virtual/block/loop2' mntput fs/namespace.c:1185 [inline] create_mnt_ns fs/namespace.c:3005 [inline] kern_unmount+0xbd/0xf0 fs/namespace.c:2995 pid_ns_release_proc+0x37/0x41 fs/proc/root.c:224 proc_cleanup_work+0x19/0x20 kernel/pid_namespace.c:64 Enabling of bearer rejected, already enabled process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 Enabling of bearer rejected, already enabled worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 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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