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Date:      Wed, 19 Mar 2008 15:01:12 +0200
From:      "Vladimir V. Kobal" <vlad@prokk.net>
To:        <freebsd-ipfw@freebsd.org>
Subject:   Dummynet causes kernel trap and system freeze
Message-ID:  <DE59CDC8B25D4939AF947F581779816A@base>

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Here is the backtraces for two sequential crashes for kernel compiled with
options         INVARIANTS
options         INVARIANT_SUPPORT

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[GDB will not be able to debug user-mode threads: =
/usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you =
are
welcome to change it and/or distribute copies of it under certain =
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for =
details.
This GDB was configured as "amd64-marcel-freebsd".

Unread portion of the kernel message buffer:


Fatal trap 9: general protection fault while in kernel mode
cpuid =3D 1; apic id =3D 01
instruction pointer=3D 0x8:0xffffffff8034332c
stack pointer        =3D 0x10:0xffffffff9e727b00
frame pointer        =3D 0x10:0xffffff00014e3031
code segment=3D base 0x0, limit 0xfffff, type 0x1b
=3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags=3D interrupt enabled, resume, IOPL =3D 0
current process=3D 29 (dummynet)
trap number=3D 9
panic: general protection fault
cpuid =3D 1
Uptime: 1h7m47s
Physical memory: 952 MB
Dumping 84 MB: 69 53 37 21 5

#0  doadump () at pcpu.h:194
194pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:194
#1  0x8888888888888889 in ?? ()
#2  0xffffffff80246bc4 in boot (howto=3D260) at =
../../../kern/kern_shutdown.c:409
#3  0xffffffff80246fbd in panic (fmt=3D0x104 <Address 0x104 out of =
bounds>)
    at ../../../kern/kern_shutdown.c:563
#4  0xffffffff803d6eb4 in trap_fatal (frame=3D0xffffff0001213000,=20
    eva=3D18446742974215792848) at ../../../amd64/amd64/trap.c:724
#5  0xffffffff803d7953 in trap (frame=3D0xffffffff9e727a50)
    at ../../../amd64/amd64/trap.c:526
#6  0xffffffff803bde7e in calltrap () at =
../../../amd64/amd64/exception.S:169
#7  0xffffffff8034332c in ip_input (m=3D0xffffff0006959300)
    at ../../../netinet/ip_input.c:520
#8  0xffffffff8033709d in dummynet_send (m=3D0xffffff0006959300)
    at ../../../netinet/ip_dummynet.c:858
#9  0xffffffff80337322 in dummynet_task (context=3DVariable "context" is =
not available.
)
    at ../../../netinet/ip_dummynet.c:834
#10 0xffffffff802767a1 in taskqueue_run (queue=3D0xffffff0001231380)
    at ../../../kern/subr_taskqueue.c:255
#11 0xffffffff80276932 in taskqueue_thread_loop (arg=3DVariable "arg" is =
not available.
)
    at ../../../kern/subr_taskqueue.c:374
#12 0xffffffff8022b03e in fork_exit (
    callout=3D0xffffffff802768e0 <taskqueue_thread_loop>,=20
    arg=3D0xffffffff805d3698, frame=3D0xffffffff9e727c80)
    at ../../../kern/kern_fork.c:781
#13 0xffffffff803be24e in fork_trampoline ()
    at ../../../amd64/amd64/exception.S:415
#14 0x0000000000000000 in ?? ()
#15 0x0000000000000000 in ?? ()
#16 0x0000000000000001 in ?? ()
#17 0x0000000000000000 in ?? ()
#18 0x0000000000000000 in ?? ()
#19 0x0000000000000000 in ?? ()
#20 0x0000000000000000 in ?? ()
#21 0x0000000000000000 in ?? ()
#22 0x0000000000000000 in ?? ()
#23 0x0000000000000000 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 0x00000000007a3000 in ?? ()
#39 0xffffffff9e727b80 in ?? ()
#40 0xffffff000110a8d0 in ?? ()
#41 0xffffffff805c5000 in facility_initialized ()
#42 0xffffff000110a8d0 in ?? ()
#43 0xffffff0001060000 in ?? ()
#44 0xffffffff9e727738 in ?? ()
#45 0xffffff0001213000 in ?? ()
#46 0xffffffff80263b8d in sched_switch (td=3D0xffffffff805d3698, =
newtd=3D0x0,=20
    flags=3DVariable "flags" is not available.
) at ../../../kern/sched_4bsd.c:905
#47 0x0000000000000000 in ?? ()
#48 0x0000000000000000 in ?? ()
#49 0x0000000000000000 in ?? ()
#50 0x0000000000000000 in ?? ()
#51 0x0000000000000000 in ?? ()
#52 0x0000000000000000 in ?? ()
#53 0x0000000000000000 in ?? ()
#54 0x0000000000000000 in ?? ()
#55 0x0000000000000000 in ?? ()
#56 0x0000000000000000 in ?? ()
#57 0x0000000000000000 in ?? ()
#58 0x0000000000000000 in ?? ()
#59 0x0000000000000000 in ?? ()
#60 0x0000000000000000 in ?? ()
#61 0x0000000000000000 in ?? ()
#62 0x0000000000000000 in ?? ()
#63 0x0000000000000000 in ?? ()
#64 0x0000000000000000 in ?? ()
#65 0x0000000000000000 in ?? ()
#66 0x0000000000000000 in ?? ()
#67 0x0000000000000000 in ?? ()
#68 0x0000000000000000 in ?? ()
#69 0x0000000000000000 in ?? ()
#70 0x0000000000000000 in ?? ()
#71 0x0000000000000000 in ?? ()
#72 0x0000000000000000 in ?? ()
#73 0x0000000000000000 in ?? ()
#74 0x0000000000000000 in ?? ()
#75 0x0000000000000000 in ?? ()
#76 0x0000000000000000 in ?? ()
#77 0x0000000000000000 in ?? ()
#78 0x0000000000000000 in ?? ()
#79 0x0000000000000000 in ?? ()
#80 0x0000000000000000 in ?? ()
#81 0x0000000000000000 in ?? ()
#82 0x0000000000000000 in ?? ()
#83 0x0000000000000000 in ?? ()
#84 0x0000000000000000 in ?? ()
#85 0x0000000000000000 in ?? ()
#86 0x0000000000000000 in ?? ()
#87 0x0000000000000000 in ?? ()
#88 0x0000000000000000 in ?? ()
#89 0x0000000000000000 in ?? ()
#90 0x0000000000000000 in ?? ()
#91 0x0000000000000000 in ?? ()
#92 0x0000000000000000 in ?? ()
#93 0x0000000000000000 in ?? ()
#94 0x0000000000000000 in ?? ()
#95 0x0000000000000000 in ?? ()
#96 0x0000000000000000 in ?? ()
#97 0x0000000000000000 in ?? ()
#98 0x0000000000000000 in ?? ()
#99 0x0000000000000000 in ?? ()
#100 0x0000000000000000 in ?? ()
#101 0x0000000000000000 in ?? ()
#102 0x0000000000000000 in ?? ()
#103 0x0000000000000000 in ?? ()
#104 0x0000000000000000 in ?? ()
#105 0x0000000000000000 in ?? ()
#106 0x0000000000000000 in ?? ()
#107 0x0000000000000000 in ?? ()
#108 0x0000000000000000 in ?? ()
#109 0x0000000000000000 in ?? ()
#110 0x0000000000000000 in ?? ()
#111 0x0000000000000000 in ?? ()
#112 0x0000000000000000 in ?? ()
#113 0x0000000000000000 in ?? ()
#114 0x0000000000000000 in ?? ()
#115 0x0000000000000000 in ?? ()
#116 0x0000000000000000 in ?? ()
#117 0x0000000000000000 in ?? ()
#118 0x0000000000000000 in ?? ()
Cannot access memory at address 0xffffffff9e728000
(kgdb) bt full
#0  doadump () at pcpu.h:194
No locals.
#1  0x8888888888888889 in ?? ()
No symbol table info available.
#2  0xffffffff80246bc4 in boot (howto=3D260) at =
../../../kern/kern_shutdown.c:409
_ep =3D Variable "_ep" is not available.
(kgdb) 
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	name="backtrace3.txt"
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	filename="backtrace3.txt"

[GDB will not be able to debug user-mode threads: =
/usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you =
are
welcome to change it and/or distribute copies of it under certain =
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for =
details.
This GDB was configured as "amd64-marcel-freebsd".

Unread portion of the kernel message buffer:
Slab at 0xffffff0001648f50, freei 12 =3D 0.
panic: Duplicate free of item 0xffffff0001648c00 from zone =
0xffffff003bfdce00(mbuf_packet)

cpuid =3D 1
Uptime: 10s
Physical memory: 952 MB
Dumping 56 MB: 41 25 9

#0  doadump () at pcpu.h:194
194pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:194
#1  0xffffff000105a480 in ?? ()
#2  0xffffffff80246bc4 in boot (howto=3D260) at =
../../../kern/kern_shutdown.c:409
#3  0xffffffff80246fbd in panic (fmt=3D0x104 <Address 0x104 out of =
bounds>)
    at ../../../kern/kern_shutdown.c:563
#4  0xffffffff803a0f28 in uma_dbg_free (zone=3DVariable "zone" is not =
available.
) at ../../../vm/uma_dbg.c:302
#5  0xffffffff8039fa54 in uma_zfree_arg (zone=3D0xffffff003bfdce00,=20
    item=3D0xffffff0001648c00, udata=3D0x0) at =
../../../vm/uma_core.c:2261
#6  0xffffffff80291147 in m_freem (mb=3D0x0) at mbuf.h:510
#7  0xffffffff8033997b in ip_fastforward (m=3D0xffffff0001648c00)
    at ../../../netinet/ip_fastfwd.c:609
#8  0xffffffff802d4ddf in ether_demux (ifp=3D0xffffff000118a800,=20
    m=3D0xffffff0001648c00) at ../../../net/if_ethersubr.c:770
#9  0xffffffff802d50a8 in ether_input (ifp=3D0xffffff000118a800,=20
    m=3D0xffffff0001648c00) at ../../../net/if_ethersubr.c:692
#10 0xffffffff801a133a in em_handle_rxtx (context=3DVariable "context" =
is not available.
)
    at ../../../dev/em/if_em.c:4542
#11 0xffffffff802767a1 in taskqueue_run (queue=3D0xffffff00011f0a80)
    at ../../../kern/subr_taskqueue.c:255
#12 0xffffffff80276932 in taskqueue_thread_loop (arg=3DVariable "arg" is =
not available.
)
    at ../../../kern/subr_taskqueue.c:374
#13 0xffffffff8022b03e in fork_exit (
    callout=3D0xffffffff802768e0 <taskqueue_thread_loop>,=20
    arg=3D0xffffff00011a84d8, frame=3D0xffffffff9e6d3c80)
    at ../../../kern/kern_fork.c:781
#14 0xffffffff803be24e in fork_trampoline ()
    at ../../../amd64/amd64/exception.S:415
#15 0x0000000000000000 in ?? ()
#16 0x0000000000000000 in ?? ()
#17 0x0000000000000001 in ?? ()
#18 0x0000000000000000 in ?? ()
#19 0x0000000000000000 in ?? ()
#20 0x0000000000000000 in ?? ()
#21 0x0000000000000000 in ?? ()
#22 0x0000000000000000 in ?? ()
#23 0x0000000000000000 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 0x00000000007a3000 in ?? ()
#40 0xffffff003bfddd20 in ?? ()
#41 0xffffff00011c3000 in ?? ()
#42 0xffffffff805c5000 in facility_initialized ()
#43 0xffffff00011c3000 in ?? ()
#44 0xffffff0001060680 in ?? ()
#45 0xffffffff9e6d37e8 in ?? ()
#46 0xffffff00011049c0 in ?? ()
#47 0xffffffff80263b8d in sched_switch (td=3D0xffffff00011a84d8, =
newtd=3D0x0,=20
    flags=3DVariable "flags" is not available.
) at ../../../kern/sched_4bsd.c:905
#48 0x0000000000000000 in ?? ()
#49 0x0000000000000000 in ?? ()
#50 0x0000000000000000 in ?? ()
#51 0x0000000000000000 in ?? ()
#52 0x0000000000000000 in ?? ()
#53 0x0000000000000000 in ?? ()
#54 0x0000000000000000 in ?? ()
#55 0x0000000000000000 in ?? ()
#56 0x0000000000000000 in ?? ()
#57 0x0000000000000000 in ?? ()
#58 0x0000000000000000 in ?? ()
#59 0x0000000000000000 in ?? ()
#60 0x0000000000000000 in ?? ()
#61 0x0000000000000000 in ?? ()
#62 0x0000000000000000 in ?? ()
#63 0x0000000000000000 in ?? ()
#64 0x0000000000000000 in ?? ()
#65 0x0000000000000000 in ?? ()
#66 0x0000000000000000 in ?? ()
#67 0x0000000000000000 in ?? ()
#68 0x0000000000000000 in ?? ()
#69 0x0000000000000000 in ?? ()
#70 0x0000000000000000 in ?? ()
#71 0x0000000000000000 in ?? ()
#72 0x0000000000000000 in ?? ()
#73 0x0000000000000000 in ?? ()
#74 0x0000000000000000 in ?? ()
#75 0x0000000000000000 in ?? ()
#76 0x0000000000000000 in ?? ()
#77 0x0000000000000000 in ?? ()
#78 0x0000000000000000 in ?? ()
#79 0x0000000000000000 in ?? ()
#80 0x0000000000000000 in ?? ()
#81 0x0000000000000000 in ?? ()
#82 0x0000000000000000 in ?? ()
#83 0x0000000000000000 in ?? ()
#84 0x0000000000000000 in ?? ()
#85 0x0000000000000000 in ?? ()
#86 0x0000000000000000 in ?? ()
#87 0x0000000000000000 in ?? ()
#88 0x0000000000000000 in ?? ()
#89 0x0000000000000000 in ?? ()
#90 0x0000000000000000 in ?? ()
#91 0x0000000000000000 in ?? ()
#92 0x0000000000000000 in ?? ()
#93 0x0000000000000000 in ?? ()
#94 0x0000000000000000 in ?? ()
#95 0x0000000000000000 in ?? ()
#96 0x0000000000000000 in ?? ()
#97 0x0000000000000000 in ?? ()
#98 0x0000000000000000 in ?? ()
#99 0x0000000000000000 in ?? ()
#100 0x0000000000000000 in ?? ()
#101 0x0000000000000000 in ?? ()
#102 0x0000000000000000 in ?? ()
#103 0x0000000000000000 in ?? ()
#104 0x0000000000000000 in ?? ()
#105 0x0000000000000000 in ?? ()
#106 0x0000000000000000 in ?? ()
#107 0x0000000000000000 in ?? ()
#108 0x0000000000000000 in ?? ()
#109 0x0000000000000000 in ?? ()
#110 0x0000000000000000 in ?? ()
#111 0x0000000000000000 in ?? ()
#112 0x0000000000000000 in ?? ()
#113 0x0000000000000000 in ?? ()
#114 0x0000000000000000 in ?? ()
#115 0x0000000000000000 in ?? ()
#116 0x0000000000000000 in ?? ()
#117 0x0000000000000000 in ?? ()
#118 0x0000000000000000 in ?? ()
#119 0x0000000000000000 in ?? ()
Cannot access memory at address 0xffffffff9e6d4000
(kgdb) bt full
#0  doadump () at pcpu.h:194
No locals.
#1  0xffffff000105a480 in ?? ()
No symbol table info available.
#2  0xffffffff80246bc4 in boot (howto=3D260) at =
../../../kern/kern_shutdown.c:409
_ep =3D Variable "_ep" is not available.
(kgdb) 
------=_NextPart_000_00A2_01C889D2.15AB3B60--




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