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Tue, 25 Nov 2025 06:30:39 -0800 (PST) Received: from [192.168.88.32] ([212.105.153.231]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-477bf36f535sm258809175e9.8.2025.11.25.06.30.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Nov 2025 06:30:39 -0800 (PST) Message-ID: Date: Tue, 25 Nov 2025 15:30:38 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 11/12] ipvlan: Ignore PACKET_LOOPBACK in handle_mode_l2() To: Dmitry Skorodumov , netdev@vger.kernel.org, Jakub Kicinski , Ido Schimmel , Eric Dumazet , Julian Vetter , Guillaume Nault , linux-kernel@vger.kernel.org Cc: andrey.bokhanko@huawei.com, Andrew Lunn , "David S. Miller" References: <20251120174949.3827500-1-skorodumov.dmitry@huawei.com> <20251120174949.3827500-12-skorodumov.dmitry@huawei.com> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20251120174949.3827500-12-skorodumov.dmitry@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/20/25 6:49 PM, Dmitry Skorodumov wrote: > Packets with pkt_type == PACKET_LOOPBACK are captured by > handle_frame() function, but they don't have L2 header. > We should not process them in handle_mode_l2(). > > This doesn't affect old L2 functionality, since handling > was anyway incorrect. > > Handle them the same way as in br_handle_frame(): > just pass the skb. > > To observe invalid behaviour, just start "ping -b" on bcast address > of port-interface. > > Signed-off-by: Dmitry Skorodumov Again, this looks like a fix suitable for 'net'. Also the condition described above looks easily reproducible, you should add a specific self-test. /P