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Mon, 8 Dec 2025 13:03:15 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 5B8D3Fw4069309 for net@FreeBSD.org; Mon, 8 Dec 2025 13:03:15 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 291420] [epair] Bad UDP packet checksum with epair(4) and txcsum enabled Date: Mon, 08 Dec 2025 13:03:15 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.3-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: dmitryluhtionov@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D291420 --- Comment #8 from Dmitry Lukhtionov --- On host machine from first jail ``` root@DL360_Gen9_m19:/home/mitya # tcpdump -envv -i bge1 host 193.34.20.8 and proto ICMP tcpdump: listening on bge1, link-type EN10MB (Ethernet), snapshot length 26= 2144 bytes 15:01:51.478254 02:ef:5d:1e:0d:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 26254, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.8 > 193.34.20.5: ICMP echo request, id 50894, seq 0, length 64 15:01:52.478934 02:ef:5d:1e:0d:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 26255, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.8 > 193.34.20.5: ICMP echo request, id 50894, seq 1, length 64 15:01:53.511342 02:ef:5d:1e:0d:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 1919, offset 0, flags [none], proto ICMP (1= ), length 84) 193.34.20.8 > 193.34.20.5: ICMP echo request, id 50894, seq 2, length 64 15:01:54.515891 02:ef:5d:1e:0d:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 51781, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.8 > 193.34.20.5: ICMP echo request, id 50894, seq 3, length 64 15:01:55.426640 02:ef:5d:1e:0d:0b > 88:28:fb:29:a4:6c, ethertype IPv4 (0x08= 00), length 78: (tos 0x0, ttl 64, id 54890, offset 0, flags [none], proto ICMP (= 1), length 64) 193.34.20.8 > 87.120.191.127: ICMP 193.34.20.8 udp port 123 unreachable, length 44 (tos 0x0, ttl 249, id 54321, offset 0, flags [none], proto UDP (17), length 36) 87.120.191.127.36373 > 193.34.20.8.123: [no cksum] NTPv2, Reserved, len= gth 8 Leap indicator: (0) ^C 5 packets captured 7462 packets received by filter 0 packets dropped by kernel ``` from second jail ``` root@DL360_Gen9_m19:/home/mitya # tcpdump -envv -i bge1 host 193.34.20.5 and proto ICMP tcpdump: listening on bge1, link-type EN10MB (Ethernet), snapshot length 26= 2144 bytes 15:02:54.598806 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 55087, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 0, length 64 15:02:55.604780 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 11515, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 1, length 64 15:02:56.607245 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 11516, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 2, length 64 15:02:57.610034 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 11517, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 3, length 64 15:02:58.613346 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 11518, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 4, length 64 15:02:59.613541 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 22118, offset 0, flags [none], proto ICMP (= 1), length 84) 193.34.20.6 > 193.34.20.5: ICMP echo request, id 60110, seq 5, length 64 ^C 6 packets captured 6957 packets received by filter 0 packets dropped by kernel ``` --=20 You are receiving this mail because: You are the assignee for the bug.=