From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D838B1A239A for ; Mon, 20 Oct 2025 01:52:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760925147; cv=none; b=e0AHbuDU75sI+OnORIGgOOf+Bo1rv1dlXWN1t8X8qbciGIerFCQ06yasAQLdnKUW7+GnPtOTm7X7/6560eYrhxNgj9dXt19m4l8l2vGnIWB9fsdMRhnHgMv9evmwSBmOGKp6yeESXHwdM5mdHtVrrAW3ZuAlZ+/bCtrEGS5hWWM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760925147; c=relaxed/simple; bh=7adGGVF9tdW1YJFMPKEmSFylgttva22iP01hwiRYwow=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=XfBTeZ8cfNcFbkTqvxPz2fILIsfqUu/0cU798B96x1GXUjhwajqzsOPG7QY3iq5ie9uDGX4IsLJ4/eI+RHt5+8/JDfx63666zNeQyeM90I7Wq/mDsdK3X8kcsHn38qLbPOq2bF6eFYDe9ZVPcQAk0Ez2LcesKycI9rPIt8SGtfw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f78.google.com with SMTP id ca18e2360f4ac-93e7b0584c9so217445539f.0 for ; Sun, 19 Oct 2025 18:52:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760925145; x=1761529945; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=rFUqgO/1X4tGf013zyFKn87MJvA/QpMdKd1TaPnKCjc=; b=vxDLxGNWA3i590/T5wW5tU99NP+65dmJpr5CKOAOWGVTi8hOTluKk1k768cw7N86kF Z4yGhzTPEgrYcUNZWMTrK/klPSPM3dDx9YsFL3avhO0OwJsCV3elA1P8T9MjvpgzT8p/ dIPjOMkoBCyY2KNWutHMSs23kpCGSM7LHoiqEMJpRZgNutuSfBtmJfARZDOBiLSwHq6z D9A8qmBFW/6x+q4HNZoObZhX7sQd/c0AM0fFm/JS1wdVBNRHzcwFqUeqUwPcXMWxfXAh X21zLeYN2dGEhwv/mm9CLrvdEdVcKDjXOy+TNuFYVhHuyZeI0mGMCDJ7rj9aoCcEVB6M casA== X-Forwarded-Encrypted: i=1; AJvYcCXbroipWt6t5Rjs8Ek/Yefa3U5YPHXSBsY+EkTEaLobKz3iK9IUDhpbRRWguhBv1zSAbD/nWZw=@vger.kernel.org X-Gm-Message-State: AOJu0Yx2+McLiAEBidXKVQ/PM8LyEpLD+j1wxbaI3sI/OaHirVLhKJhA ZNXoQFtXbzR6sepBDh+WdgPayZGusT8hwCengY9ThpVQHGaEkBJtPgX2iCN/xHQerJ4wQHDBVP3 shZ/bX6adjNv8YjNdCXcL2h7yGDYHRy/C2zJnnzVw8PZ2oKtxvnG/c9828HU= X-Google-Smtp-Source: AGHT+IGEOGgAhJ/VqxDKE9fKEFF/jaq3tSnh+we7qLzZ2LAHPDAXshaEsuvm4ccKBJLGxkBNcROv4yDvfOrJP5YcURXXt2nQ2uHU Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:6409:b0:901:3363:e663 with SMTP id ca18e2360f4ac-93e76451522mr1784937939f.13.1760925145012; Sun, 19 Oct 2025 18:52:25 -0700 (PDT) Date: Sun, 19 Oct 2025 18:52:25 -0700 In-Reply-To: <66f49736.050a0220.211276.0036.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68f595d8.050a0220.91a22.043c.GAE@google.com> Subject: Re: [syzbot] [wireguard?] INFO: task hung in wg_netns_pre_exit (5) From: syzbot To: Jason@zx2c4.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, jason@zx2c4.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, wireguard@lists.zx2c4.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 88224095b4e5 Merge branch 'net-dsa-lantiq_gswip-clean-up-a.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=17b28de2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=913caf94397d1b8d dashboard link: https://syzkaller.appspot.com/bug?extid=f2fbf7478a35a94c8b7c compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10796b04580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f3cb46a2b9fc/disk-88224095.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0d43ffbc738d/vmlinux-88224095.xz kernel image: https://storage.googleapis.com/syzbot-assets/9817e4fdd10a/bzImage-88224095.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f2fbf7478a35a94c8b7c@syzkaller.appspotmail.com INFO: task kworker/u8:8:6081 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:8 state:D stack:23424 pid:6081 tgid:6081 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0x165/0x360 kernel/sched/core.c:7026 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083 __mutex_lock_common kernel/locking/mutex.c:676 [inline] __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:760 wg_netns_pre_exit+0x1c/0x1d0 drivers/net/wireguard/device.c:419 ops_pre_exit_list net/core/net_namespace.c:161 [inline] ops_undo_list+0x187/0x990 net/core/net_namespace.c:234 cleanup_net+0x4d8/0x820 net/core/net_namespace.c:696 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz-executor:6161 blocked for more than 147 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:25608 pid:6161 tgid:6161 ppid:1 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0x165/0x360 kernel/sched/core.c:7026 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.