Date: Tue, 5 Jul 2011 12:57:20 -0400 From: Arnaud Lacombe <lacombar@gmail.com> To: ports@subnets.ru Cc: net@freebsd.org Subject: Re: Netgraph udp tunneling Message-ID: <CACqU3MUKebhJ3ZXMxDRMAKOXpXp2jiXNYf0Qo91qcbPE%2BKUV2A@mail.gmail.com> In-Reply-To: <4E11A8D3.40102@subnets.ru> References: <4E11A8D3.40102@subnets.ru>
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Hi, 2011/7/4 Alexey V. Panfilov <ports@subnets.ru>: > Hi! > > We've three servers, connected as S1 <-ng_tunnel-> S2 <-ng_tunnel-> S3. > > Over tunnels runs BGP with full-view. > > Sometimes on S2 occures fatal trap with automatic reboot or without reboo= t > at all. It not depends of net loading (mbps or pps). > > If process of save a core was successfull, backtrace always shows that fa= tal > trap occures because of large packet (size around 60Kbyte) was received. > > > Any help are welcome. Thanks. > > ---------------------------------------------------------------------- > > Info about S2: > > smbios.system.maker=3D"IBM" > smbios.system.product=3D"System x3250 M3 -[425232G]-" > hw.model: Intel(R) Core(TM) i3 CPU =A0 =A0 =A0 =A0 530 =A0@ 2.93GHz > hw.physmem: 4207792128 > dev.em.0.%desc: Intel(R) PRO/1000 Network Connection 7.1.9 > dev.em.0.%pnpinfo: vendor=3D0x8086 device=3D0x10d3 subvendor=3D0x1014 > subdevice=3D0x03bd class=3D0x020000 > > NOTE: On S2 used only em0 > > /etc/sysctl.conf: > net.inet.icmp.icmplim=3D50 > net.inet.tcp.blackhole=3D2 > net.inet.udp.blackhole=3D1 > net.inet.icmp.drop_redirect=3D1 > net.inet.icmp.log_redirect=3D0 > net.inet.ip.redirect=3D0 > > Netgraph's tunnels are configured such as it wrote at example > (/usr/share/examples/netgraph/udp.tunnel): > > ngctl mkpeer iface dummy inet > ngctl mkpeer ng0: ksocket inet inet/dgram/udp > ngctl name ng0:inet to_S1 > ngctl msg ng0:inet bind inet/1.1.1.1:60001 > ngctl msg ng0:inet connect inet/5.5.5.5:60001 > ifconfig ng0 10.0.0.1 10.0.0.2 netmask 255.255.255.252 > > ngctl mkpeer iface dummy inet > ngctl mkpeer ng1: ksocket inet inet/dgram/udp > ngctl name ng1:inet to_S3 > ngctl msg ng1:inet bind inet/1.1.1.3:60002 > ngctl msg ng1:inet connect inet/7.7.7.7:60002 > ifconfig ng1 10.0.0.5 10.0.0.6 netmask 255.255.255.252 > > FreeBSD S2.line 8.2-RELEASE-p2 FreeBSD 8.2-RELEASE-p2 #1: Wed Jun 22 > 13:56:26 MSD 2011 =A0 =A0 root@S2.line:/usr/src/sys/amd64/compile/BGP =A0= amd64 > > Hardware and software configurations on S1 and S3 are identical to S2, bu= t > they runs without problem. > > ------------------------------------------------------------------------ > > backtrace: > > Unread portion of the kernel message buffer: > > > Fatal trap 12: page fault while in kernel mode > cpuid =3D 3; apic id =3D 05 > fault virtual address =A0 =3D 0x18 > fault code =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D supervisor read data, page not = present > instruction pointer =A0 =A0 =3D 0x20:0xffffffff803f4a87 > stack pointer =A0 =A0 =A0 =A0 =A0 =3D 0x28:0xffffff811c80a5a0 > frame pointer =A0 =A0 =A0 =A0 =A0 =3D 0x28:0xffffff811c80a600 > code segment =A0 =A0 =A0 =A0 =A0 =A0=3D base 0x0, limit 0xfffff, type 0x1= b > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D DPL 0, pres 1, long 1,= def32 0, gran 1 > processor eflags =A0 =A0 =A0 =A0=3D interrupt enabled, resume, IOPL =3D 0 > current process =A0 =A0 =A0 =A0 =3D 1478 (ng_queue0) > trap number =A0 =A0 =A0 =A0 =A0 =A0 =3D 12 > panic: page fault > cpuid =3D 3 > Uptime: 11d23h7m40s > Physical memory: 4012 MB > Dumping 674 MB: 659 643 627 611 595 579 563 547 531 515 499 483 467 451 4= 35 > 419 403 387 371 355 339 323 307 291 275 259 243 227 211 195 179 163 147 1= 31 > 115 99 83 67 51 35 19 3 > > Reading symbols from /boot/kernel/coretemp.ko...Reading symbols from > /boot/kernel/coretemp.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/coretemp.ko > Reading symbols from /boot/kernel/ng_socket.ko...Reading symbols from > /boot/kernel/ng_socket.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/ng_socket.ko > Reading symbols from /boot/kernel/netgraph.ko...Reading symbols from > /boot/kernel/netgraph.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/netgraph.ko > Reading symbols from /boot/kernel/ng_iface.ko...Reading symbols from > /boot/kernel/ng_iface.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/ng_iface.ko > Reading symbols from /boot/kernel/ng_ksocket.ko...Reading symbols from > /boot/kernel/ng_ksocket.ko.symbols...done. > done. > Loaded symbols for /boot/kernel/ng_ksocket.ko > #0 =A0doadump () at pcpu.h:224 > 224 =A0 =A0 pcpu.h: No such file or directory. > =A0 =A0 =A0 =A0in pcpu.h > (kgdb) bt > #0 =A0doadump () at pcpu.h:224 > #1 =A00xffffffff80398d3e in boot (howto=3D260) at > ../../../kern/kern_shutdown.c:419 > #2 =A00xffffffff80399153 in panic (fmt=3D0x0) at > ../../../kern/kern_shutdown.c:592 > #3 =A00xffffffff8056f19d in trap_fatal (frame=3D0xffffff00070828c0, eva= =3DVariable > "eva" is not available. > ) at ../../../amd64/amd64/trap.c:783 > #4 =A00xffffffff8056f55f in trap_pfault (frame=3D0xffffff811c80a4f0, user= mode=3D0) > at ../../../amd64/amd64/trap.c:699 > #5 =A00xffffffff8056f95f in trap (frame=3D0xffffff811c80a4f0) at > ../../../amd64/amd64/trap.c:449 > #6 =A00xffffffff80557ba4 in calltrap () at > ../../../amd64/amd64/exception.S:224 > #7 =A00xffffffff803f4a87 in m_copym (m=3D0x0, off0=3D2980, len=3D1480, wa= it=3D1) at > ../../../kern/uipc_mbuf.c:542 obviously enough, m_copym() does not like to be passed a NULL mbuf :) - Arnaud > #8 =A00xffffffff8047fc07 in ip_fragment (ip=3D0xffffff010e8d0558, > m_frag=3D0xffffff811c80a718, mtu=3DVariable "mtu" is not available. > ) at ../../../netinet/ip_output.c:819 > #9 =A00xffffffff80480d1f in ip_output (m=3D0xffffff010e8d0500, opt=3DVari= able > "opt" is not available. > ) at ../../../netinet/ip_output.c:650 > #10 0xffffffff8047ca00 in ip_forward (m=3D0xffffff010e317600, srcrt=3DVar= iable > "srcrt" is not available. > ) at ../../../netinet/ip_input.c:1521 > #11 0xffffffff8047e1cd in ip_input (m=3D0xffffff010e317600) at > ../../../netinet/ip_input.c:729 > #12 0xffffffff8044eebe in netisr_dispatch_src (proto=3D1, source=3DVariab= le > "source" is not available. > ) at ../../../net/netisr.c:917 > #13 0xffffffff80a2dd76 in ng_linkinfo_type_fields () from > /boot/kernel/netgraph.ko > #14 0xffffffff80a26ae0 in ng_path2noderef (here=3DVariable "here" is not > available. > ) at netgraph.h:463 > #15 0xffffffff80a25bee in ng_worklist_add (node=3D0xffffff016abda168) at > /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base.c:3378 > #16 0xffffffff80a30339 in ng_namehash_mtx () from /boot/kernel/netgraph.k= o > #17 0xffffffff80a26be0 in ng_path2noderef (here=3D0xffffff002dd93c00, > address=3DVariable "address" is not available. > ) at /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base.c:1= 773 > #18 0xffffffff80a27ceb in ng_apply_item (node=3D0x246, > item=3D0xffffff002dd93c70, rw=3D0) at > /usr/src/sys/modules/netgraph/netgraph/../../../netgraph/ng_base.c:2613 > #19 0xffffffff8036ff68 in fork_exit (callout=3D0xffffffff80a27b80 > <ng_apply_item+1920>, arg=3D0x0, frame=3D0xffffff811c80ac40) at > ../../../kern/kern_fork.c:845 > #20 0xffffffff8055806e in fork_trampoline () at > ../../../amd64/amd64/exception.S:565 > #21 0x0000000000000000 in ?? () > #22 0x0000000000000000 in ?? () > #23 0x0000000000000001 in ?? () > #24 0x0000000000000000 in ?? () > #25 0x0000000000000000 in ?? () > #26 0x0000000000000000 in ?? () > #27 0x0000000000000000 in ?? () > #28 0x0000000000000000 in ?? () > #29 0x0000000000000000 in ?? () > #30 0x0000000000000000 in ?? () > #31 0x0000000000000000 in ?? () > #32 0x0000000000000000 in ?? () > #33 0x0000000000000000 in ?? () > #34 0x0000000000000000 in ?? () > #35 0x0000000000000000 in ?? () > #36 0x0000000000000000 in ?? () > #37 0x0000000000000000 in ?? () > #38 0x0000000000000000 in ?? () > #39 0x0000000000000000 in ?? () > #40 0x0000000000000000 in ?? () > #41 0x0000000000000000 in ?? () > #42 0x0000000000000000 in ?? () > #43 0x0000000000000000 in ?? () > #44 0x0000000000000000 in ?? () > #45 0xffffffff807cce40 in affinity () > #46 0x0000000000000000 in ?? () > #47 0x0000000000000000 in ?? () > #48 0xffffff0001efa000 in ?? () > #49 0xffffff811c809c80 in ?? () > #50 0xffffff811c809c28 in ?? () > #51 0xffffff0001d20460 in ?? () > #52 0xffffffff803be5f9 in sched_switch (td=3D0xffffffff80a27b80, newtd=3D= 0x0, > flags=3DVariable "flags" is not available. > ) at ../../../kern/sched_ule.c:1852 > Previous frame inner to this frame (corrupt stack?) > > -- > Simple Lehisnoe ;-) > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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