From owner-freebsd-net@freebsd.org Thu Apr 29 17:57:50 2021 Return-Path: Delivered-To: freebsd-net@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 A4BD26321F5 for ; Thu, 29 Apr 2021 17:57:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4FWNWf46NDz4tgk for ; Thu, 29 Apr 2021 17:57:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 8D08C632605; Thu, 29 Apr 2021 17:57:50 +0000 (UTC) Delivered-To: net@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 8CC97632499 for ; Thu, 29 Apr 2021 17:57:50 +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 4FWNWf3VR4z4tLp for ; Thu, 29 Apr 2021 17:57:50 +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 668FA1EE19 for ; Thu, 29 Apr 2021 17:57:50 +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 13THvoi6091341 for ; Thu, 29 Apr 2021 17:57:50 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 13THvosN091340 for net@FreeBSD.org; Thu, 29 Apr 2021 17:57:50 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 255495] udp socket inheritance after fork+exec Date: Thu, 29 Apr 2021 17:57:50 +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: 12.2-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: eugen@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: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cc 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-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Apr 2021 17:57:50 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255495 Bug ID: 255495 Summary: udp socket inheritance after fork+exec Product: Base System Version: 12.2-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: net@FreeBSD.org Reporter: eugen@freebsd.org CC: mav@FreeBSD.org, melifaro@FreeBSD.org I observe the following unexpected behaviour while running both net/frr7 and net/mpd5 within same 12.2-STABLE/amd64 system. After boot, it runs just fin= e: # sockstat | fgrep frr frr staticd 37908 6 dgram -> /var/run/logpriv frr staticd 37908 10 stream -> /var/run/frr/zserv.api frr staticd 37908 11 stream /var/run/frr/staticd.vty frr ospfd 37903 6 dgram -> /var/run/logpriv frr ospfd 37903 10 stream -> /var/run/frr/zserv.api frr ospfd 37903 11 stream /var/run/frr/ospfd.vty frr zebra 37898 6 dgram -> /var/run/logpriv frr zebra 37898 18 stream /var/run/frr/zserv.api frr zebra 37898 21 stream /var/run/frr/zebra.vty frr zebra 37898 23 stream /var/run/frr/zserv.api frr zebra 37898 28 stream /var/run/frr/zserv.api # sockstat | fgrep mpd5 | fgrep udp4 root mpd5 26675 26 udp4 *:1701 *:* That is, mpd5 expects incoming L2TP connections at port udp/1701 and frr7 daemon do not use any UDP sockets, as configured. The mpd5 daemon has ip-down/ip-up scripts that may do "service frr stop" and "service frr start" in come cases, so frr7 daemons may be started as grandchildren of mpd5 process. After that, I observe this: # sockstat | fgrep frr frr staticd 40712 6 dgram -> /var/run/logpriv frr staticd 40712 12 stream -> /var/run/frr/zserv.api frr staticd 40712 13 stream /var/run/frr/staticd.vty frr staticd 40712 26 udp4 *:1701 *:* frr ospfd 40707 6 dgram -> /var/run/logpriv frr ospfd 40707 12 stream -> /var/run/frr/zserv.api frr ospfd 40707 13 stream /var/run/frr/ospfd.vty frr ospfd 40707 26 udp4 *:1701 *:* frr zebra 40702 6 dgram -> /var/run/logpriv frr zebra 40702 24 stream /var/run/frr/zserv.api frr zebra 40702 25 stream /var/run/frr/zebra.vty frr zebra 40702 26 udp4 *:1701 *:* frr zebra 40702 30 stream /var/run/frr/zserv.api frr zebra 40702 35 stream /var/run/frr/zserv.api frr daemons somehow inherit udp4/1501 socket and that is bad for local L2TP service, it is broken now. --=20 You are receiving this mail because: You are the assignee for the bug.=