From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LlSUib0M" Received: from mail-oi1-x22f.google.com (mail-oi1-x22f.google.com [IPv6:2607:f8b0:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60710C8 for ; Mon, 20 Nov 2023 22:40:40 -0800 (PST) Received: by mail-oi1-x22f.google.com with SMTP id 5614622812f47-3b3f6dd612cso3226787b6e.3 for ; Mon, 20 Nov 2023 22:40:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700548839; x=1701153639; darn=vger.kernel.org; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :from:to:cc:subject:date:message-id:reply-to; bh=eL4jCQeFQIYZYErtx4yG+Kj0J/IpnUxPNL3amNjq+0k=; b=LlSUib0MwDRhM3vZ3nyib6id8B0P4QGLs6utn3B9U2xV0o4UlOz0FQrEIKQqhNHu/K QrR/y2UvsxKdtpcIZwRGrN9B1sfzpGz8bP0ucQvO8eifDUyWWYQKqUrFHvSni/fQJJ8X sAw4/BJ4RRE+tbKfMPncV04esVoZ/nlvn6I471FypMUpVdahCw4QKjTYypkDSMCES3Cf kHlANFh+824ssxeHs7zZRRc7WfetZRNuJdGksfdFN9Hb/YTcNpepiztHkyF9Mw7GZ95W Ah5+ze+KlpuZAR2l83/a9kIEF7cMjUHyN14DYBCEXXIjiXhurnAJeYeGhIFGb0/3GwFe dKOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700548839; x=1701153639; h=content-disposition:mime-version:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=eL4jCQeFQIYZYErtx4yG+Kj0J/IpnUxPNL3amNjq+0k=; b=kQNsMZhYe065onYEry9k/l/TFbKylMgdwR029ust3Zsq3d7t3sZgCMjI8qxD633CSr UysoomCiwXTU1c/p8DUY5Fah4eRwh9TUo7yWynr9aBe/JOl+UOfzfSoMuqWS0KF21/C+ i1uzvBIQF4zDkyt6ASGfdIDkFzSrtcrogyUpTLaJzTLzFmDN/7Pol0AHAiYCAXa6JgtN QCE8h0HTc2Bx227QGtnVmGrX7ZFHM4I8NBCNbV8Z8ILjf8eryPlO9jQ92iRT0rnV7Ka9 SuG6h67+AZhGlvfH7wMUVHTd8f0HlsUAZWxnbd1AXA0RRX0otvin5Xj85kCZbxAVHc6k 3rVw== X-Gm-Message-State: AOJu0Yx+FWcwSmbWyeRADfIFpNrUjnaVRH6hN69vaBa2gqkZIJlwmELy S/L9KmDAtwB5Zs+RD8Ko1rSiJWaH1I2EYBRm X-Google-Smtp-Source: AGHT+IFR28x8RDScHvGCe6ir5WNJ9ojr4T5O7gyShm5f/P+BeNfNgzn29FzwME8VITm72vOnAEgi0g== X-Received: by 2002:a05:6808:159e:b0:3b2:ea7c:c402 with SMTP id t30-20020a056808159e00b003b2ea7cc402mr14402857oiw.25.1700548839646; Mon, 20 Nov 2023 22:40:39 -0800 (PST) Received: from Laptop-X1 ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id fn19-20020a056a002fd300b006c5da6411b9sm7198022pfb.101.2023.11.20.22.40.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Nov 2023 22:40:38 -0800 (PST) Date: Tue, 21 Nov 2023 14:40:35 +0800 From: Hangbin Liu To: David Ahern Cc: netdev@vger.kernel.org Subject: selftest fib_nexthop_multiprefix failed due to route mismatch Message-ID: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi David, Recently when run fib_nexthop_multiprefix test I saw all IPv6 test failed. e.g. # ./fib_nexthop_multiprefix.sh TEST: IPv4: host 0 to host 1, mtu 1300 [ OK ] TEST: IPv6: host 0 to host 1, mtu 1300 [FAIL] With -v it shows COMMAND: ip netns exec h0 /usr/sbin/ping6 -s 1350 -c5 -w5 2001:db8:101::1 PING 2001:db8:101::1(2001:db8:101::1) 1350 data bytes >From 2001:db8:100::64 icmp_seq=1 Packet too big: mtu=1300 --- 2001:db8:101::1 ping statistics --- 1 packets transmitted, 0 received, +1 errors, 100% packet loss, time 0ms Route get 2001:db8:101::1 via 2001:db8:100::64 dev eth0 src 2001:db8:100::1 metric 1024 expires 599sec mtu 1300 pref medium Searching for: 2001:db8:101::1 from :: via 2001:db8:100::64 dev eth0 src 2001:db8:100::1 .* mtu 1300 TEST: IPv6: host 0 to host 1, mtu 1300 [FAIL] So we can get the Packet too big from 2001:db8:100::64 successfully. There is no "from ::" anymore. I plan to fix this issue. But I can't find which commit changed the behavior and the client could receive Packet too big message with correct src address. Do you have any hints? Thanks Hangbin