From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-182.mta1.migadu.com (out-182.mta1.migadu.com [95.215.58.182]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 865112E1F11; Fri, 20 Mar 2026 07:33:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773992015; cv=none; b=f89zpMIl6Bks1UadhQKedrfmCgka89gQNTZ1TLBzsdb1Y/NGvHnkCj2dSWc57D/kaDAZIddmls+H1/MYMlmuo5L8JonZty88Y9ActgYmgklSonuwqO/XqH6KIhfXgnlWQavnErlQo+esE6iiM+4lpL/DkraBcQ7UnJ62aX4nzIc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773992015; c=relaxed/simple; bh=mDxASL2NYfrGfQNB0AwjVZ78bVAlLUC3X5AxC4QKgxY=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=sqyhL66/h98PMN8Vf8MnK2Kp4rYm8ouJtJtkueG/XmEx+3mgqrBg97lWz/skT0aNM/dALQ5BCKmqSIR4SX84xUKPMD6lbDefKtbWPEVbmFRsoK0pe7H53MY200//yd7Xd6Om/YTgHudVawg25oVl6lt1FyhWlCcITE0RjdT3Wx8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=i20Ts1sl; arc=none smtp.client-ip=95.215.58.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="i20Ts1sl" Message-ID: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1773992011; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ewotJeu+IfO3qRPmLBMELeKgiPEzDCIRjYWohnQPmXs=; b=i20Ts1slsIChM5gklO7p6itL8svLCLzmi4nQyBODoE/0qpdfC30pWm8mAKA3mQ+9ejAwBV c36ydo+vuNorO7uJqL6OwG3helgZ1QrTQ/LY/m/TGkZL+KS8Wn9E/6kCvCtgEEt7KB+cUj BycYm4cKumdY+fJlRcKclG+/pVMawv0= Date: Fri, 20 Mar 2026 15:33:09 +0800 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH net v5 1/2] bonding: fix null-ptr-deref in bond_rr_gen_slave_id() X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Jiayuan Chen To: Paolo Abeni , Nikolay Aleksandrov , Sebastian Andrzej Siewior Cc: netdev@vger.kernel.org, jiayuan.chen@shopee.com, syzbot+80e046b8da2820b6ba73@syzkaller.appspotmail.com, Jay Vosburgh , Andrew Lunn , "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Shuah Khan , Clark Williams , Steven Rostedt , Jussi Maki , linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-rt-devel@lists.linux.dev References: <20260309030702.128520-1-jiayuan.chen@linux.dev> <20260309030702.128520-2-jiayuan.chen@linux.dev> <8d746046-eed9-4d82-a064-c20b6a131bdc@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT On 3/12/26 7:02 PM, Jiayuan Chen wrote: > f who calls it, preventing similar crashes from other potential code > paths. Sorry for the noise. Could we include both: 1. Add link status check in xdp 2. Adding a defensive null check in bond_rr_gen_slave_id() This way, the bond layer is robust regardless of who calls it, preventing similar crashes from other potential code paths.