From owner-freebsd-standards@freebsd.org Tue Jan 3 12:16:52 2017 Return-Path: Delivered-To: freebsd-standards@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 77410C9D017 for ; Tue, 3 Jan 2017 12:16:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4C5891CDD for ; Tue, 3 Jan 2017 12:16:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v03CGq1W047832 for ; Tue, 3 Jan 2017 12:16:52 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-standards@FreeBSD.org Subject: [Bug 215727] [iscsi] target sends invalid NOP-out and drops connection if initiator doesn't reply Date: Tue, 03 Jan 2017 12:16:52 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: standards X-Bugzilla-Version: 11.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: nareg.sinenian@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-standards@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 attachments.created 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-standards@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Standards compliance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Jan 2017 12:16:52 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215727 Bug ID: 215727 Summary: [iscsi] target sends invalid NOP-out and drops connection if initiator doesn't reply Product: Base System Version: 11.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: standards Assignee: freebsd-standards@FreeBSD.org Reporter: nareg.sinenian@gmail.com Created attachment 178470 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D178470&action= =3Dedit Sample NOP-In sent by the FreeBSD target The target sends NOPs to the initiator and expects a reply. When it doesn't receive a reply, it drops the connection. The problem, however, is that standards-compliant initiator will not respond to the NOP sent by the target because it contains an invalid target transfer tag. See RFC7143 Sec. 10.19.1: If the target is sending a NOP-In as a ping (intending to receive a corresponding NOP-Out), this field is set to a valid value (not the reserved value 0xffffffff). The FreeBSD target sends a NOP-In expecting a reply, but the field is NOT s= et to a valid value. It is instead set to the reserved value of 0xffffffff. I have verified this by examining target traffic. A sample log is attached.= In this case, the target dropped the connection due to a "ping timeout" as observed on the console:=20 WARNING: 10.10.6.5 (iqn.2015-01.com.localhost): connection error; dropping connection WARNING: 10.10.6.5 (iqn.2015-01.com.localhost): no ping reply (NOP-Out) aft= er 5 seconds; dropping connection --=20 You are receiving this mail because: You are the assignee for the bug.=