From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f177.google.com (mail-pl1-f177.google.com [209.85.214.177]) (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 119D9283FD9 for ; Fri, 14 Aug 2026 01:23:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786670626; cv=none; b=tKeeXYPyFIjaHvTGzaS4fW5Hg5SSY/J0cKF4+KbQxGiPK/hY+pGTLq1upxfaJRLUwHF02fD2gPo3t5ROfGhuvGTdfjB1YBa48pdmHNAgEGRiOnv5K+/Shiv7AEALXpqEckhP0c6ryDnprpqsvT1ceg5p6kyOi9caKOlgB4LH7s0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786670626; c=relaxed/simple; bh=k1PdrtA/9PqMB4Q/KFzTfjWb3Z2R+facX6ikbQwV5ho=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=eA2hnbeHM8JZsuf6z1ZtE2Azs5cIZaCxv3Il1347ePAEGoFoJyfLcliL3P0DuehgGnZBjYR8PGVlocYdqzP89BZb9E104Oaw9VX99YKFoK/aa03yxgC5QE+zDqGSeN7EYbo9eE1B2WR7ygKb3RyMj74QyVlYZHbtDGNo9z6b4i4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=M8aam0fa; arc=none smtp.client-ip=209.85.214.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="M8aam0fa" Received: by mail-pl1-f177.google.com with SMTP id d9443c01a7336-2cc97653887so9267465ad.1 for ; Thu, 13 Aug 2026 18:23:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786670624; x=1787275424; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=Ec9denQCMG1siPi/j1GAugEq6qMWjv0MMecbi60zlMI=; b=M8aam0faoKFfAN3E2M0QjZaPvQhMkWoqM1z9QvW+oWj8Rfl1lVxlzWcb3Wd7FHIewb 0RqlBQFdPTbyz9+wCOm2BJZLzAwsMaan8ajP/tH/Pwyz7oTYtsIUwIcSfY0m5ZXTUcaq lZfCwgQkpY7vUS+xlte/q9nfrnobu2Vgd1zhzgCQyhq8UwK4gD778IaVV/T40MBDabzD 9dy6H/PvsA+YPkDdrkBuAoQSE+NDNDFIjkAbuU4kVY97+Kj35Y05dJUsAnih1cYDwhWY 3qjbyDk92C21qcwyq6q/VEHurj5cI6xEcIntdqhxv5/S30+jbHSFu8HjfUP0UEvf+uTH X8NA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786670624; x=1787275424; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Ec9denQCMG1siPi/j1GAugEq6qMWjv0MMecbi60zlMI=; b=sSuaOZSiFzCEMz0Uc9HEMlG+wf+NPJdfHj2Z5jJusXna/3bHOvB3Z3to9pI+3i90wI VtdUqKTAQ9lGIPt7Re/fBtGZUaYwGQw46hrhFGK3x1odOhx/0eitxiTJv1LaQZawQ8Ju pMHSuQBDc5zI7dyJjG0akTZ7oJOxow1OFqAZcYMnsksSD+oglLXDGIcaJSUeH0YOzlku 9V0wONay8cw1KUJM910ayAQqE3IV8ElTxYhOy9zp8d41VR4dEFYYgG+hrj7qSTdUx5gy nQKqAzVRB+PrPoxo/Fu3py/hfSqbV49+pID/mT5oYKaaviJ03SX2pfRSegyhshuyZP7B rsUQ== X-Forwarded-Encrypted: i=1; AHgh+RrYkMBqDkjQWtTXndhYx8B+vtz0hr8bxMc/6RBVFc0ypZvPrJjWfm26haWdrJ3UYquFlSQLIi+O3G5i3Po=@vger.kernel.org X-Gm-Message-State: AOJu0Yw+QnrtH409hQVz+vtV9ZbhsU57Sz0qqbWYOmAQ95ebTTD5s9ji qYUavccfl7JTrkmyhpWloz3adlpn5xR6A0ca44ANAAnqd6Fk/MPMP7KD X-Gm-Gg: AR+sD12VxangoI4utx1ew4ObjCJI4N3NOFgCHEUWB6QWqw4zQ14xYSWUI34OszdUBQZ yrxiA7rKwxn4CHn0I9iNJpbLoIepY4800rsKehCKhuu4qO19hkCA5iMVx6OA1GA+qESKbzg+uRU BXHLipVtZyl5OY/fbNUnmiz/9cTXw6bAjSRnod0IGMBWuxo+k/gNcyH0jmwMhNJ7BR3b3mfdqOW 8SnnpVPtElSN4GfJwhp2lUEQsB6FGEFAsnH0A/w4hvwf5M6NSvp/AbQ+YRKeW233YO0ZK1318xN 5Y3vT4qkiWpn/MLGXZvuKeABEINgqGRT3AGBfTwatLv27x6NX1BU0Bn2NiPfCLR5XgzoBcMsqtS U6YaKU6a0cns+Izy/0PXFONboSCU5xKMEqY2PRp+xQlWrnoFYWYoH+zBtJZ5p9CokMXbdRm/Zrv 6ztZgIwzNf37xc+aSvn4FRtm99NiGXKFT2TB419XD+YxhGMff8s7LTM54= X-Received: by 2002:a05:6a21:688:b0:3c3:92ba:c61f with SMTP id adf61e73a8af0-3cc71c1b043mr2280234637.8.1786670623990; Thu, 13 Aug 2026 18:23:43 -0700 (PDT) Received: from fedora ([203.175.12.240]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cbef710a897sm1667083a12.18.2026.08.13.18.23.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Aug 2026 18:23:42 -0700 (PDT) Date: Fri, 14 Aug 2026 09:23:36 +0800 From: Hangbin Liu To: Ruoyu Wang Cc: netdev@vger.kernel.org, jv@jvosburgh.net, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH net] bonding: initialize err for empty target lists Message-ID: References: <20260813153126.3952893-1-ruoyuw560@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260813153126.3952893-1-ruoyuw560@gmail.com> On Thu, Aug 13, 2026 at 11:31:26PM +0800, Ruoyu Wang wrote: > Empty NLA_NESTED attributes are valid, and bonding uses them to clear > the ARP and NS target lists. When either target attribute is empty, > nla_for_each_nested() does not execute, so err retains an uninitialized > value before it is tested. The request can consequently return an > unpredictable error after clearing the targets. > > Initialize err to zero so an empty target list completes successfully. > Non-empty lists still propagate errors from __bond_opt_set() unchanged. > > This issue was found by a static analysis checker and confirmed by manual > source review. > > Fixes: 4fb0ef585eb2 ("bonding: convert arp_ip_target to use the new option API") > Signed-off-by: Ruoyu Wang > --- > drivers/net/bonding/bond_netlink.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c > index 4a11572f663d31..87d92d3cce4a88 100644 > --- a/drivers/net/bonding/bond_netlink.c > +++ b/drivers/net/bonding/bond_netlink.c > @@ -220,7 +220,7 @@ static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[], > struct bonding *bond = netdev_priv(bond_dev); > struct bond_opt_value newval; > int miimon = 0; > - int err; > + int err = 0; > > if (!data) > return 0; > -- > 2.51.0 > Reviewed-by: Hangbin Liu