misc/120332: Kernel Panic/Crash when adding a certain IP address
warchild at wardeb.no-ip.org
Wed Feb 6 23:20:01 UTC 2008
>Synopsis: Kernel Panic/Crash when adding a certain IP address
>Arrival-Date: Wed Feb 06 23:20:01 UTC 2008
>Originator: Jurgen Weber
>Release: FreeBSD 7.0-RC1
FreeBSD <servername> 7.0-RC1 FreeBSD 7.0-RC1 #0: Mon Dec 24 12:18:24 UTC 2007 root at logan.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
When adding a certain IP address to any of the NIC's in the system it would crash reboot within 2 minuts of booting up. After some investigation and mucking about wiht NIC's I worked out it was a particular IP address. 10.10.10.9.
oot at clashserver /usr/src/sys/i386]# kgdb /boot/kernel/kernel.symbols /var/crash/vmcore.0
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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This GDB was configured as "i386-marcel-freebsd".
Unread portion of the kernel message buffer:
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address = 0x18
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc07851c5
stack pointer = 0x28:0xe6883a48
frame pointer = 0x28:0xe6883a64
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 476 (nfsd)
trap number = 12
panic: page fault
cpuid = 1
Physical memory: 1011 MB
Dumping 157 MB: 142 126 110 94 78 62 46 30 14
#0 doadump () at pcpu.h:195
195 pcpu.h: No such file or directory.
I have a debian system also, which had an fstab entry to mount a directory which was not in exports, this system was untouched thou (eg. I didn't try and mount it).
I could repeat the problem by just going
ifconfig em0 add 10.10.10.9 netmask 255.255.0.0
IP address in question 10.10.10.9/16 network. I used 10.10.10.11 with no problems.
After getting that dump I noticed nfsd was the problem.
NFSD server was active
I hashed out that line in exports and disabled the nfsd.
System is now stable.
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