Date: Mon, 08 Dec 2025 13:03:15 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 291420] [epair] Bad UDP packet checksum with epair(4) and txcsum enabled Message-ID: <bug-291420-7501-sFnwc6nNau@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-291420-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-291420-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291420 --- Comment #8 from Dmitry Lukhtionov <dmitryluhtionov@gmail.com> --- 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 262144 bytes 15:01:51.478254 02:ef:5d:1e:0d:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x0800), 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 (0x0800), 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 (0x0800), 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 (0x0800), 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 (0x0800), 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, length 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 262144 bytes 15:02:54.598806 02:15:ec:28:01:0b > c4:34:6b:b8:e4:39, ethertype IPv4 (0x0800), 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 (0x0800), 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 (0x0800), 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 (0x0800), 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 (0x0800), 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 (0x0800), 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 ``` -- You are receiving this mail because: You are the assignee for the bug.help
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