From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 24AB22853E5 for ; Mon, 16 Jun 2025 16:07:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750090025; cv=none; b=EXWIdu5dfi5KZBbiYnRiZenLQtus3CPddaX6MR5CtHVjyCawIc7IlxfKqZJvoLOJefy/RLnciVZXXchxNBSCW//kUA3420mq0hhLN+0HkpBm2n1riE9Qi1fWKj5MGKsWrv7NIL7Iw/erLQ6AYHqzWe4i9O8ZJn4MaLldFYrAlIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750090025; c=relaxed/simple; bh=ods/arTWG7zZ2uno2X+VmD8n9DuNm4lm7lNPDCPVQEM=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=sX70ny/bf19ZWs6t+0OmcHsybEPpReyUF6xmvNlVoxMyDFwWPe2B6M/QwQPCJ2doyQEZgoCW7vggrrZBZjLm3SF7UWW4/mTjemPdElxfTSIvx1NRUNrGRGCAuHLNSDYu1Np2IrqAHta+xxoIfltBP317sBEQeoTyEddLglVe7VE= 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=209.85.166.71 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-f71.google.com with SMTP id ca18e2360f4ac-8730ca8143eso539535639f.0 for ; Mon, 16 Jun 2025 09:07:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750090022; x=1750694822; 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=oyrMjgYCMoTHaFVZEjrnp+WPauvIoz+a+6ANv4xt5JQ=; b=Rc5Oo5wWbxvXkbUSg+yLeroQgzft2TmfnfEEnXOhYWCtK1pUiCAJK7pxG+itP9HRvv 9sI/rpR1LIJZpQhJaXG0BZ9Dlyh/jvzqZRp9GEP0dYFCGE7PnWhXRbKwJorMdJEyKNCj BSHezyQzizFdR0sNU7MYwTX+5uj/ZyPzeyd9vGt1O9sDSimtw5WzQuq91dUNtD9NLt5E m+je8+aSMaQbBKPGe+nJfeQQrt1ehtjpuNSpRoFdewrXp5uY7p4FAqvIfAzuyEBbs2vS dzEzOYTUDPNkgssGNcCMSV7UsxwQU57/8UyplwU6xF2IbBCe2o7lmUsfdGhWp4N4IK7u GmDA== X-Forwarded-Encrypted: i=1; AJvYcCWOW+5WtyVgq4dSM8hv3VJtXz9JQ2b2Ff0sXR7VtCVUMaGaqkR1wsn251D3klaZjKDvT84IAZk=@vger.kernel.org X-Gm-Message-State: AOJu0YxyAMpdJh/WQe6mdqLC3yaHCRdGaWLNPyZJuBjgKn2Akic+1m2V 0JZRBF36kFibZ/sOQBFoRaYlFcfgckEubyOL1DbcgngB0V35W2ocjtH9v5dc876aEp4wrOrrYTj DSouhd5Vo05HT962VuzrtQp/wDBjfEGeN+L3uOVOzmw/f/PVJ55y0+sRxKuE= X-Google-Smtp-Source: AGHT+IGmzmhbQ10jKNMeBAYJc+boB0tO/bcvbxwh5R9+sXakm1D6YTGCMbDL0izvDKBz7Z1D9WlTUL0k4yqTud7rdk241oGDatiK Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2787:b0:3dc:7b3d:6a45 with SMTP id e9e14a558f8ab-3de07a9c6a0mr103005305ab.0.1750090022305; Mon, 16 Jun 2025 09:07:02 -0700 (PDT) Date: Mon, 16 Jun 2025 09:07:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68504126.a70a0220.395abc.01e4.GAE@google.com> Subject: Re: [syzbot] [net?] WARNING in __linkwatch_sync_dev (2) From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, stfomichev@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING: suspicious RCU usage in bond_mii_monitor ============================= WARNING: suspicious RCU usage 6.16.0-rc2-syzkaller-ge04c78d86a96-dirty #0 Not tainted ----------------------------- drivers/net/bonding/bond_main.c:2736 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u32:0/12: #0: ffff888044cc7948 ((wq_completion)bond0#2){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213 #1: ffffc900000f7d10 ((work_completion)(&(&bond->mii_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214 #2: ffffffff9034d128 (rtnl_mutex){+.+.}-{4:4}, at: bond_mii_monitor+0x122/0x2a20 drivers/net/bonding/bond_main.c:2966 stack backtrace: CPU: 2 UID: 0 PID: 12 Comm: kworker/u32:0 Not tainted 6.16.0-rc2-syzkaller-ge04c78d86a96-dirty #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: bond0 bond_mii_monitor Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x166/0x260 kernel/locking/lockdep.c:6871 bond_miimon_inspect drivers/net/bonding/bond_main.c:2736 [inline] bond_mii_monitor+0xab6/0x2a20 drivers/net/bonding/bond_main.c:2973 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: now running without any active interface! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: now running without any active interface! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: now running without any active interface! bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: now running without any active interface! bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: now running without any active interface! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down bond0: (slave bond_slave_0): link status definitely up, 10000 Mbps full duplex bond0: (slave bond_slave_1): link status definitely up, 10000 Mbps full duplex bond0: active interface up! bond0: (slave bond_slave_0): interface is now down bond0: (slave bond_slave_1): interface is now down Tested on: commit: e04c78d8 Linux 6.16-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1321e90c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4130f4d8a06c3e71 dashboard link: https://syzkaller.appspot.com/bug?extid=b8c48ea38ca27d150063 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1423490c580000