From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753444AbeDSOwD (ORCPT ); Thu, 19 Apr 2018 10:52:03 -0400 Received: from mail-it0-f72.google.com ([209.85.214.72]:36516 "EHLO mail-it0-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752733AbeDSOwC (ORCPT ); Thu, 19 Apr 2018 10:52:02 -0400 X-Google-Smtp-Source: AIpwx49QJ+2Dj3DmCExN5soT47SyPC7p25xSO86XV584YXFK/RKyuVyQI/b7n4TwfqOEmo5+OQEOKLpREN03kw/FWSycxaoZwr+f MIME-Version: 1.0 Date: Thu, 19 Apr 2018 07:52:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d71bf6056a34b628@google.com> Subject: unregister_netdevice: waiting for DEV to become free From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit 87ef12027b9b1dd0e0b12cf311fbcb19f9d92539 (Wed Apr 18 19:48:17 2018 +0000) Merge tag 'ceph-for-4.17-rc2' of git://github.com/ceph/ceph-client syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=2dfb68e639f0621b19fb So far this crash happened 5 times on upstream. Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5531107864870912 Kernel config: https://syzkaller.appspot.com/x/.config?id=1808800213120130118 compiler: gcc (GCC) 8.0.1 20180413 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2dfb68e639f0621b19fb@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. connbytes_mt_check: 1 callbacks suppressed xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. unregister_netdevice: waiting for lo to become free. Usage count = 3 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. kernel msg: ebtables bug: please report to author: Entries_size never zero xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 nla_parse: 1 callbacks suppressed netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 netlink: 17 bytes leftover after parsing attributes in process `syz-executor6'. xt_connbytes: cannot load conntrack support for proto=7 --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com. syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.