Date: Thu, 29 Apr 2021 17:57:50 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 255495] udp socket inheritance after fork+exec Message-ID: <bug-255495-7501@https.bugs.freebsd.org/bugzilla/>
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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.=
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