From owner-freebsd-bugs@freebsd.org Tue Dec 29 09:44:33 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 4228A4D6F4E for ; Tue, 29 Dec 2020 09:44:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4D4qJK1D12z3n1n for ; Tue, 29 Dec 2020 09:44:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 29E144D6F4D; Tue, 29 Dec 2020 09:44:33 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 29AA24D6BD9 for ; Tue, 29 Dec 2020 09:44:33 +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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4D4qJK02h2z3n1m for ; Tue, 29 Dec 2020 09:44:33 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) 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 E867D1C8A for ; Tue, 29 Dec 2020 09:44:32 +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 0BT9iW8P007995 for ; Tue, 29 Dec 2020 09:44:32 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 0BT9iWTd007994 for bugs@FreeBSD.org; Tue, 29 Dec 2020 09:44:32 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: bugs@FreeBSD.org Subject: [Bug 252263] [tcp] Should we reject packets with the nonmonotonic timestamp? Date: Tue, 29 Dec 2020 09:44:33 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: yonghaoz1994@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Dec 2020 09:44:33 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D252263 Bug ID: 252263 Summary: [tcp] Should we reject packets with the nonmonotonic timestamp? Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: yonghaoz1994@gmail.com The following packetdrill shows different result of last read between Linux= and FreeBSD ``` 0 socket(..., SOCK_STREAM, IPPROTO_TCP) =3D 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) =3D 0 +0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) =3D 0 +0 bind(3, ..., ...) =3D 0 +0 listen(3, 1) =3D 0 +0 < S 0:0(0) win 1000 +.5 > S. 0:0(0) ack 1 <...> +.1 < . 1:1(0) ack 1 win 1000 +0.1 accept(3, ..., ...) =3D 4 +0 fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK) =3D 0 +0 < . 1:1001(1000) ack 1 win 1000 +0.1 read(4, ..., 1000) =3D 1000 // Linux accept this packet, while FreeBSD reject. // But if we set the TS val to 50, they both reject it. +0 < . 1001:2001(1000) ack 1 win 1000 +0.1 read(4, ..., 1000) =3D 1000 ``` --=20 You are receiving this mail because: You are the assignee for the bug.=