From nobody Fri Mar 17 15:30:14 2023 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4PdSkH34FGz3yVVM for ; Fri, 17 Mar 2023 15:30:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4PdSkH12Nrz4B72 for ; Fri, 17 Mar 2023 15:30:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1679067015; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=994oAX+iEaq7mx8oZKYJL8NNV8qeC9je+DR96CZCvVE=; b=CWdHOnKm1UdmxgdoDGtCECu1Jw9vjkqvlItBLR1UPNkHNY3eE/25xqp35WkoWd8o+hxmkl 1KVMJyLiik4C5svBzOmUh+/px5cMUTZpceRonw/S335K/PRjcneqEBauKN2/qS1iWI9YkJ IZprIFg7iVu9rZGz543VeU190OHs/KKZ0LwTlCLSKYLnbyONse3kLvAaAtfxXGIQcbGgaw MaAzgLePw47/hramstNn1J2syXL0MU8vKBn9oE8ycDwmN7ao5MXBU9t7UkAF4+1uWtOxRF bUR0v9OcZ8NW4rDYeIM0Ogxx/B11YbADBhq0ighhrDUC0sydN+2rLc/h24GPpw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1679067015; a=rsa-sha256; cv=none; b=VO7wiZU5y5W+axTqOZh1iW6T101OSiAUDx+rmatATEJarrJaQZKpLE3HKTQrIg2oNzrmms E5YKc9kM16UpncFjSjGmPZ7WtZuvDpP0IuAF1OMwQVeKs+EPMmBg5I3NaLQsqCoeXRlXNJ pNT8wotYvzQuP2JxOHEpJDbb0r6C/8s1ccQCxcKbMD8b7B/PCqlOhedo4JZCYmjPpxVZGl KXDd/D6fDC4XhogM/Q09+gKOKV50qZ8sUiP7+3as1KPUIo3ZAe3NsLy/NVOgxHjZDEZG1L edP7hCP7PZJ6gkJpUIrDiO1SizaNYPll9tLmIjdiyD4KRYzEcui+aJ5GQ9PLKw== Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4PdSkH0124zWCb for ; Fri, 17 Mar 2023 15:30:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 32HFUEJx050332 for ; Fri, 17 Mar 2023 15:30:14 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 32HFUEKs050331 for net@FreeBSD.org; Fri, 17 Mar 2023 15:30:14 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 270285] Network issue with very small frames (tcp, padded) Date: Fri, 17 Mar 2023 15:30:14 +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: 12.3-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: tuexen@freebsd.org 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-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D270285 --- Comment #8 from Michael Tuexen --- Please note that the padding is NOT part of the IP packet. Therefore, no no= de should consider at as being part of the IP packet or even the TCP payload. I guess some node is looking at the Ethernet frame length to deduce the IP pa= cket length, instead of looking at the length field in the IP header. Network ca= rds did this wrong in the past and failed hardware checksum checks since they t= ook the padding into consideration where they shouldn't. This doesn't help here, but might give a hint where things can go wrong. --=20 You are receiving this mail because: You are the assignee for the bug.=