setting MROUTING option in kernel causes reboot on delete vimage

[Jorn Rikkers]

Hi,

I'm trying to run a multicast simulation with CORE and XORP, using vimage. I've recompiled my kernel with the MROUTING option set. Unfortunately the system crashes after deleting a vimage, even when remove it just after creation. e.g

vimage -c e0_n0
vimage -d e0_n0
# system crash -> reboot

I've used the vimage_7_20090505.tgz source with the folowing build config file

#--------------------------
include    GENERIC
ident        CORE

options    IPSEC
device      crypto
options    VIMAGE
options    IPFIREWALL
options    IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default
options    MROUTING

nooptions    SCTP
#--------------------------

I've tried to determine the cause by looking at the backtrace of the crash, but without success. Could somebody help me with this? See the backtrace below.

thanks,

Jorn Rikkers 


$ sudo kgdb kernel.debug /var/crash/vmcore.6
Password:
GNU gdb 6.1.1 [FreeBSD]
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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.
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This GDB was configured as "i386-marcel-freebsd"...

Unread portion of the kernel message buffer:
<6>eth0: promiscuous mode disabled


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address    = 0x1c74
fault code        = supervisor read, page not present
instruction pointer    = 0x20:0xc091113d
stack pointer            = 0x28:0xe7b9eb20
frame pointer            = 0x28:0xe7b9eb44
code segment        = base 0x0, limit 0xfffff, type 0x1b
            = DPL 0, pres 1, def32 1, gran 1
processor eflags    = interrupt enabled, resume, IOPL = 0
current process        = 3654 (vimage)
trap number        = 12
panic: page fault
cpuid = 0
Uptime: 53m59s
Physical memory: 2034 MB
Dumping 179 MB: 164 148 132 116 100 84 68 52 36 20 4

Reading symbols from /boot/kernel/acpi.ko...Reading symbols from /boot/kernel/acpi.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/acpi.ko
Reading symbols from /boot/kernel/linux.ko...Reading symbols from /boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /usr/local/modules/fuse.ko...done.
Loaded symbols for /usr/local/modules/fuse.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_ether.ko...Reading symbols from /boot/kernel/ng_ether.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_ether.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_eiface.ko...Reading symbols from /boot/kernel/ng_eiface.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_eiface.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
Reading symbols from /boot/kernel/ng_pipe.ko...Reading symbols from /boot/kernel/ng_pipe.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_pipe.ko
#0  doadump () at pcpu.h:196
196        __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) backtrace
#0  doadump () at pcpu.h:196
#1  0xc07e6ca7 in boot (howto=260) at ../../../kern/kern_shutdown.c:418
#2  0xc07e6f79 in panic (fmt=Variable "fmt" is not available.
) at ../../../kern/kern_shutdown.c:574
#3  0xc0ac8a4c in trap_fatal (frame=0xe7b9eae0, eva=7284)
    at ../../../i386/i386/trap.c:939
#4  0xc0ac8cd0 in trap_pfault (frame=0xe7b9eae0, usermode=0, eva=7284)
    at ../../../i386/i386/trap.c:852
#5  0xc0ac967c in trap (frame=0xe7b9eae0) at ../../../i386/i386/trap.c:530
#6  0xc0aadd6b in calltrap () at ../../../i386/i386/exception.s:159
#7  0xc091113d in X_ip6_mrouter_done () at ../../../netinet6/ip6_mroute.c:566
#8  0xc08dfbfd in vnet_mroute_idetach (unused=0x0)
    at ../../../netinet/ip_mroute.c:3150
#9  0xc0802de9 in vnet_mod_destructor (vml=0x0)
    at ../../../kern/kern_vimage.c:850
#10 0xc08041d2 in vi_td_ioctl (cmd=2352769381, vi_req=0xc655a000, 
    td=0xc6d1c240) at ../../../kern/kern_vimage.c:782
#11 0xc0884535 in ifioctl (so=0xc6f06d20, cmd=2352769381, 
    data=0xc655a000 "\002", td=0xc6d1c240) at ../../../net/if.c:2141
#12 0xc08289d2 in soo_ioctl (fp=0xc6f00720, cmd=2352769381, data=0xc655a000, 
    active_cred=0xc6897500, td=0xc6d1c240) at ../../../kern/sys_socket.c:198
#13 0xc0821735 in kern_ioctl (td=0xc6d1c240, fd=3, com=2352769381, 
    data=0xc655a000 "\002") at file.h:269
#14 0xc0821894 in ioctl (td=0xc6d1c240, uap=0xe7b9ecfc)
---Type <return> to continue, or q <return> to quit---
    at ../../../kern/sys_generic.c:571
#15 0xc0ac9025 in syscall (frame=0xe7b9ed38) at ../../../i386/i386/trap.c:1090
#16 0xc0aaddd0 in Xint0x80_syscall () at ../../../i386/i386/exception.s:255
#17 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb) 

 		 	   		  
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