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 724E5C2D0A3 for ; Fri, 6 Nov 2020 10:53:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E799208B3 for ; Fri, 6 Nov 2020 10:53:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727100AbgKFKxZ (ORCPT ); Fri, 6 Nov 2020 05:53:25 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:33178 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726642AbgKFKxZ (ORCPT ); Fri, 6 Nov 2020 05:53:25 -0500 Received: by mail-il1-f198.google.com with SMTP id p17so712758ilj.0 for ; Fri, 06 Nov 2020 02:53:24 -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=DDSyTW0cXmYYVcRPO4w8oETTjvfxbaLefaEF1z3VOqw=; b=UEsOp2T0nv2KGfVKApGfp8etzya74eKXz/j+DmhcJeAtKcs7lt/5uR8mvJ3zNlLDrC k/zhdhM9DwbsIcebpCkVVcfDWqu6mkIdB5+WQ2hjb/MjNQd4WlBSAMGAg77fVLNH6qpM C1fTqFUoRSH0PGohycCcOLAmjBh3KMH4tdus8VBqA7ybJFhQT71q15iSZXR8+lJs6afY iBqpHbbAq1MSsETGNemJrb5XIl8gcXnHLSCdrccr1QXS1reUZQzl8+0HmFZ1WnfzHQY6 0L4p7Cxgo8rTdRIFQH/CUh2V9+wI/RJfmpX9LkLqRcMkN0hK+ysWyK1/0GDB47yOv8HF jVCg== X-Gm-Message-State: AOAM530O13Bf7Dih7wW3KhRR0mE2mD8VHwZG58Pe9jFqJPykWvxFouOn MYdBd9tY8nVqinWPmT841YONy1UabiRllejztXB8Fi3J/SUz X-Google-Smtp-Source: ABdhPJyW6YXkMYU74RkWHcekbpdxFTrNthZb9JCrArTwPLfB6vH6p3Oj1st3EsqwF3G89qvqNXHc4U3zgyZNV9Uh1STyXsK9LMjX MIME-Version: 1.0 X-Received: by 2002:a5e:9604:: with SMTP id a4mr973198ioq.61.1604660004200; Fri, 06 Nov 2020 02:53:24 -0800 (PST) Date: Fri, 06 Nov 2020 02:53:24 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000892b3905b36e059b@google.com> Subject: WARNING: bad unlock balance in ieee80211_unregister_hw From: syzbot To: ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net, gnault@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: cb5dc5b0 Merge branch 'bpf: safeguard hashtab locking in N.. git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=13498a0c500000 kernel config: https://syzkaller.appspot.com/x/.config?x=58a4ca757d776bfe dashboard link: https://syzkaller.appspot.com/bug?extid=a6e9e84a19d90b996a65 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+a6e9e84a19d90b996a65@syzkaller.appspotmail.com ===================================== WARNING: bad unlock balance detected! 5.9.0-syzkaller #0 Not tainted ------------------------------------- kworker/u4:3/24893 is trying to release lock ((wq_completion)phy264) at: [] flush_workqueue+0xe1/0x13e0 kernel/workqueue.c:2780 but there are no more locks to release! other info that might help us debug this: 3 locks held by kworker/u4:3/24893: #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff8881407aa938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243 #1: ffffc9000218fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247 #2: ffffffff8c914010 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa00 net/core/net_namespace.c:566 stack backtrace: CPU: 1 PID: 24893 Comm: kworker/u4:3 Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_unlock_imbalance_bug include/trace/events/lock.h:58 [inline] __lock_release kernel/locking/lockdep.c:5126 [inline] lock_release.cold+0x34/0x4e kernel/locking/lockdep.c:5462 flush_workqueue+0x125/0x13e0 kernel/workqueue.c:2784 drain_workqueue+0x1a5/0x3c0 kernel/workqueue.c:2948 destroy_workqueue+0x71/0x760 kernel/workqueue.c:4372 ieee80211_unregister_hw+0x1a2/0x210 net/mac80211/main.c:1388 mac80211_hwsim_del_radio drivers/net/wireless/mac80211_hwsim.c:3360 [inline] hwsim_exit_net+0x56b/0xc90 drivers/net/wireless/mac80211_hwsim.c:4115 ops_exit_list+0xb0/0x160 net/core/net_namespace.c:187 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:604 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 device hsr_slave_1 left promiscuous mode batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth0_macvtap left promiscuous mode --- 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.