From owner-freebsd-bugs@freebsd.org Wed Mar 7 15:10:41 2018 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0B9F6F3539D for ; Wed, 7 Mar 2018 15:10:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9D61779953 for ; Wed, 7 Mar 2018 15:10:40 +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 mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id E1FA4170E6 for ; Wed, 7 Mar 2018 15:10:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w27FAdPJ096436 for ; Wed, 7 Mar 2018 15:10:39 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w27FAdU6096427 for freebsd-bugs@FreeBSD.org; Wed, 7 Mar 2018 15:10:39 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: freebsd-bugs@FreeBSD.org Subject: [Bug 226421] v6 address truncated and socket type shows "tcp46" when IPv4 mapping enabled Date: Wed, 07 Mar 2018 15:10:39 +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: 11.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: dan.mcgregor@usask.ca X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-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 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-bugs@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Mar 2018 15:10:41 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D226421 Bug ID: 226421 Summary: v6 address truncated and socket type shows "tcp46" when IPv4 mapping enabled Product: Base System Version: 11.1-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: dan.mcgregor@usask.ca Created attachment 191279 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D191279&action= =3Dedit Proposed patch to correct IPv6 vs IPv4 check in receive path Since bug 221385's been closed, with net.inet6.ip6.v6only=3D0, a socket lis= tening on an IPv6 address accepts a connection from another IPv6 host, the accepted socket shows type "tcp46" and has its address truncated to the lower 32 bit= s: USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN ADDRESS dan sshd 711 3 tcp46 254.11.122.185:22 0.0.0.2:47615 root sshd 708 3 tcp46 254.11.122.185:22 0.0.0.2:47615 The addresses are the lower 32 bits of the IPv6 addresses in question, 2001:470:1f17:273:2a0:98ff:fe0b:7ab9 and 2001:470:1c:4df::2. The expected result would be: USER COMMAND PID FD PROTO LOCAL ADDRESS FOREIGN ADDRESS dan sshd 40475 3 tcp6 2001:470:30f3:1:ca60:ff:fe5f:c1f3:22 2001:470:30f3:1:922b:34ff:fe5d:d4b3:33558 root sshd 35424 3 tcp6 2001:470:30f3:1:ca60:ff:fe5f:c1f3:22 2001:470:30f3:1:922b:34ff:fe5d:d4b3:33558 This appears to be due to the kernel assuming any socket whose inp_vflag includes IPv4 is an IPv4 socket. The accepted socket inherits that value fr= om the parent socket. It should only have tcp46 for listening sockets, and in accept check that only INP_IPV4 is set. --=20 You are receiving this mail because: You are the assignee for the bug.=