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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 9EF95C433B4 for ; Wed, 5 May 2021 07:51:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4477E613C0 for ; Wed, 5 May 2021 07:51:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231823AbhEEHwW (ORCPT ); Wed, 5 May 2021 03:52:22 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:53094 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231650AbhEEHwV (ORCPT ); Wed, 5 May 2021 03:52:21 -0400 Received: by mail-il1-f200.google.com with SMTP id s2-20020a056e0210c2b0290196bac26c2cso872207ilj.19 for ; Wed, 05 May 2021 00:51:25 -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=Gx9YBfhAApSMSPzOqe5EH8EB6gM0L8yCq0gPlS464UU=; b=CUZMgBke2HxIZpHHJ4msD+AFV0YGIHw6sIjNE39taQnZSMo7z4foc3AZJwXTf42wXn Su+Ze22rK/3bS8wjnkgRPIXmiBLGd44NyeErzTPuDJTnnRkR+zI5YwgjxTkPVat72AkN kP4Wk9MOovxVXrHvRjTArd0IiC7DNJgqFnqLG6RWvKgF3Q6wZ7Kiu93ROcwh64zzV/5Q Ag0Gir4ck2PbdwIhir9Ml7CeKmKX0xqGd9zxtk0kHK3Vzs/v7LZRdkyd0NNCMtqToGca S6FLPbgNipggnDXRCpItjlU5oUfi2iklgb07hBANp8dKlv9MOnZMvIE5uuu9+GncIOuL ajXQ== X-Gm-Message-State: AOAM533BWcAa+hCCoNtnwjy/WbfEaD/McKEs4gYpisBRuxDD/umjByik AJKelXiI0TPmZW9RpospsGLri7BNZpDGx7unzBJgNa88N0hN X-Google-Smtp-Source: ABdhPJzdPNhHyMYBHXL0JYjztH6zmVszihIm7f31Ad1OxlScuoLTx+WgrjzQGen0TAtJceQS5ifexN+o1oId6QQk5R66/IpAVim5 MIME-Version: 1.0 X-Received: by 2002:a92:a301:: with SMTP id a1mr23649432ili.41.1620201084819; Wed, 05 May 2021 00:51:24 -0700 (PDT) Date: Wed, 05 May 2021 00:51:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000201e3405c19076a4@google.com> Subject: [syzbot] WARNING: suspicious RCU usage in nf_ct_iterate_cleanup (2) From: syzbot To: ap420073@gmail.com, christian.brauner@ubuntu.com, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, gnault@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, serge@hallyn.com, 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: d2b6f8a1 Merge tag 'xfs-5.13-merge-3' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=120f2da3d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=65c207250bba4efe dashboard link: https://syzkaller.appspot.com/bug?extid=86efe6206c1373c8a7cc 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+86efe6206c1373c8a7cc@syzkaller.appspotmail.com ============================= WARNING: suspicious RCU usage 5.12.0-syzkaller #0 Not tainted ----------------------------- kernel/sched/core.c:8304 Illegal context switch in RCU-bh read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 0 3 locks held by kworker/u4:7/11790: #0: ffff888011e93138 ( (wq_completion)netns ){+.+.}-{0:0} , at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] , at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] , at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] , at: set_work_data kernel/workqueue.c:616 [inline] , at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] , at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc90002377da8 ( net_cleanup_work ){+.+.}-{0:0} , at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffffffff8d672190 ( pernet_ops_rwsem ){++++}-{3:3} , at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557 stack backtrace: CPU: 1 PID: 11790 Comm: kworker/u4:7 Not tainted 5.12.0-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:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 ___might_sleep+0x229/0x2c0 kernel/sched/core.c:8304 get_next_corpse net/netfilter/nf_conntrack_core.c:2223 [inline] nf_ct_iterate_cleanup+0x16d/0x450 net/netfilter/nf_conntrack_core.c:2245 nf_conntrack_cleanup_net_list+0x81/0x250 net/netfilter/nf_conntrack_core.c:2432 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178 cleanup_net+0x4ea/0xb10 net/core/net_namespace.c:595 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 --- 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.